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1z0-160 oracle

Number: 1z0-160Passing Score: 800Time Limit: 120 min



Exam A

QUESTION 1You want to perform database recovery with the most recent backup.

Which command would you execute?


A. dbaascli rec –args –latest

B. dbaascli orec –args -latest

C. dbaascli rec –args -last

D. dbaascli orec –args -last

Correct Answer: BSection: (none)Explanation

Explanation/Reference:dbaascli orec latest command restores the most recent backup and performs complete recovery.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/dbaascli.html

QUESTION 2You are migrating an Oracle Database 11.2.0.4 on-premise database to an Oracle Database Cloud Service (Database as a Service) that provides a pre-createdOracle Database 12.1.0.2 database.

What four migration methods can be used?

A. conventional export/import

B. Transportable Tablespace (TTS) with RMAN conversion

C. Transportable Tablespace (TTS) by using Oracle Data Pump

D. SQL *Loader

E. RMAN image restore

F. Data Pump Transportable Database (TDB) export/import


Correct Answer: BCDFSection: (none)Explanation

Explanation/Reference:You load data into an Oracle database on Oracle Database Cloud Service using the same tools you would use for an Oracle database on another system.

* (D) Using SQL*Loader to Load Data into the Database* Using Oracle Data Pump Import to Load Data into the Database* (BC) Using Transportable Tablespaces to Load Data into the DatabaseThere are two ways to transport a tablespace:Manually, involving issuing commands to SQL*Plus, RMAN, and Data Pump.Using the Transport Tablespaces Wizard in Enterprise Manager

* Using Pluggable Databases (PDBs) to Load Data into the Database* Using Oracle Public Cloud Data Transfer Services to Move Large Data Sets* (F) Full transportable export/import, is available to make migration to Oracle Database 12c faster, easier, and more efficient than ever before. Full transportableexport is available starting with Oracle Database 11g Release 2 (11.2.0.3).

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/load-data-db.htmlhttps://docs.oracle.com/cd/B28359_01/server.111/b28310/tspaces013.htm#ADMIN11395http://www.oracle.com/technetwork/database/enterprise-edition/full-transportable-wp-12c-1973971.pdf

QUESTION 3You created a Database as a Service (DBaaS) instance. This action also created a virtual machine and configured it for the DBaaS instance. It also created twouser accounts. One of the users is oracle.

What three functions can the oracle user perform?

A. Grant privileges and roles to database users.

B. Create database users.

C. Back up and recover databases.

D. Create tablespaces.

E. Reboot a VM.

F. Use the sudo command to perform root user access operations.

Correct Answer: ABCSection: (none)Explanation


Explanation/Reference:oracle is the Oracle Database administrator account you use to access the system and perform non-root database administration tasks. A home directory, /home/oracle, is created for this user. This user cannot use the sudo command to perform operations that require root-user access. Additionally, by default you cannotconnect as this user to the compute node using SSH. You can add the public key to the user’s $HOME/.ssh/authorized_keys file to grant persistent SSH access, oryou can connect as the opc user and then use the sudo -s command to start a root-user command shell, followed by an su - oracle command to switch to theoracle user.

Incorrect Answers:F: root is the root administrator for the system. You do not have direct access to this account. To perform operations that require root-user access, use the sudocommand as the opc, not the oracle, user.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/linux-user-accounts-rac.htmlhttp://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/dbaas/obe_dbaas_administering_your_database_cloud_service/obe_dbaas_administering_your_database_cloud_service.html

QUESTION 4Where is the Oracle Database Cloud software for monitoring and backup installed?

A. The Oracle Database Cloud software is located in the Database Automatic Diagnostic Repository (ADR).

B. The installation is done at /var/opt/oracle/dbaascli and /var/opt/oracle/bkup_api.

C. The location must be set during installation as user-defined locations for the installation to start.

D. The location is based on Oracle Flex Architecture, which is similar to non-DBaaS systems.


Explanation/Reference:When a database deployment is created using the Oracle Database Cloud Service service level, software is installed in the following locations.

* bkup_api utility /var/opt/oracle/bkup_api* dbaascli utility /var/opt/oracle/dbaascli* Oracle REST Data Services /u01/app/oracle/product/apex_listener* Oracle Database$ORACLE_HOME:

Oracle Database 12c: /u01/app/oracle/product/12.1.0/dbhome_1Oracle Database 11g: /u01/app/oracle/product/11.2.0/dbhome_1

Note: Using the dbaascli utility, you can perform operations like:Changing the password of the SYS userChecking the status of the Oracle Data Guard configuration


Switchover and failover in an Oracle Data Guard configurationPatching the database deploymentDatabase recoveryRotating the master encryption key

References: Using Oracle Database Cloud Service (February 2017), A-4https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/using-oracle-database-cloud-service.pdf

QUESTION 5Oracle provides additional web-based tools for monitoring Database as a Service (DBaaS) instances. One of the tools is DBaaS Monitor Console.

Which user would you have to log in as to use this tool?

A. dbsnmp

B. sys

C. dbaas_monitor

D. sysman

Correct Answer: CSection: (none)Explanation

Explanation/Reference:To access Oracle DBaaS Monitor when the HTTPS port is unblocked:1. Open the Oracle Database Cloud Service console.2. From the menu for the deployment, select Open DBaaS Monitor Console.

A window prompting you for your user name and password is displayed.3. Enter dbaas_monitor as the user name and the password specified during the database deployment creation process, and then click OK.

References: Using Oracle Database Cloud Service (February 2017), 10-2https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/using-oracle-database-cloud-service.pdf

QUESTION 6How would you connect from your local machine to the database instance on the DBaaS server by using SQL*Net?

A. You start an SSH process on your local machine to communicate to a tunnel created on the DBaaS server.

B. You must use port 1521 and the TCPS communication protocol.

C. You can use only the SSH connection that is defined on port 22 that is configured by default during DBaaS instance installation.

D. You must use Transparent Data Encryption (TDE) to secure connections to the DBaaS database instance when using SQL*Net connections from your localmachine to DBaaS database instances.



Explanation/Reference:To confirm remote access to the database through the SQL*Net security rule, create a connection to the database in Oracle SQL Developer. When creating theconnection, fill out the fields as follows:

Username: enter SYSTEM.Password: enter Pa55_WoRd.Hostname: enter the Public IP address of the compute node associated with the database deployment. To find out this address, display details of the service asdescribed in Viewing Detailed Information for a Database DeploymentPort: enter 1521.SID: enter ORCL.

After entering values, click Test to test the connection.

Note: TCPS is TCP/IP with SSL.


QUESTION 7How do you enable a default connection between Database as a Service (DBaaS) instances?

A. by creating network groups and adding the instances that you want to communicate to that group

B. by creating dedicated communication keys and setting them to be used only for your DBaaS instance-to-instance communication

C. by creating nothing for communication between the DBaaS instances because all instances are interconnected by default

D. by installing and configuring the NETMGR utility for your DBaaS environment, and then using it to set up the required communication channels


Explanation/Reference:Before your DBaaS database was created, you or a coworker generated a private and public SSH key pair, perhaps using PuTTY Key Generator.The public key was specified when your database instance was created; a copy of that public key was stored in the VM hosting your database.When you define in PuTTY an SSH connection to the VM hosting your database, you will specify a copy of the private key stored on your local PC. When youinitiate a PuTTY connection, the VM compares the private key to the matching public key stored in the VM. The VM permits the connection when the private andpublic key match as a valid key pair.

References: http://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/dbaas/obe_dbaas_connecting_to_an_instance/


obe_dbaas_connecting_to_an_instance.html

QUESTION 8You are on the Database Cloud Service Instance View page.

Which three consoles can you open?

A. OPC Console

B. GlassFish Administration Console

C. Storage Container Console

D. Application Express Console

E. User Console

F. Database Express Manager Console

Correct Answer: DEFSection: (none)Explanation

Explanation/Reference:DF: The menu for each deployment that provides the following options:

Open DBaaS Monitor Console — Open the Oracle Cloud Database Monitor for the deployment.Open Application Express Console — Open the Oracle Application Express home page for the deployment.Open EM Console — Open the database console, either Enterprise Manager Database Express 12c or Enterprise Manager 11g Database Control.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/service-console-services-page.html

QUESTION 9What are two ways to enable a port on your DBaaS VM server for access to your DBaaS instance?


A. Use your public and private key pairs to define a list of preferred ports that get enabled during your DBaaS instance installation.

B. Create a tunnel for port forwarding by using SSH.

C. Configure all remote connections through port 22 that is assigned by default for SSH connections.

D. Ask Oracle DBaaS Support to open the required ports.


E. Use the DBaaS Compute Cloud Service Console to open ports to a set of IP addresses.

Correct Answer: BCSection: (none)Explanation

Explanation/Reference:C: SSH is a cryptographic network protocol that uses two keys, one public and one private, to provide secure communication between two networked computers.Port 22 is the standard TCP/IP port that is assigned to SSH servers.

B: To access network protocols and services on a compute node by using a port other than port 22, you must either:- Enable network access to the port You can use the Oracle Database Cloud Service console to enable access to a port on a compute node.- Create an SSH tunnel to the port Creating an SSH tunnel enables you to access a specific compute node port by using an SSH connection as the transport mechanism. To create the tunnel, youmust have the SSH private key file that matches the public key specified during the database deployment creation process.


QUESTION 10A key pair is required to create a DBaaS instance.

What can the key pair be used for?

A. They key pair is used to start up, shut down, and manage EM Express availability.

B. The keys are used to control the encryption that is used by DBaaS database instances: the first is for network encryption and the second is for databaseencryption.

C. The keys replace password use. DBaaS instance use only key pairs; password authentication is not enable for SSH default connections.

D. Communication between instances in a DBaaS account is controlled by network access rules and network groups.


Explanation/Reference:Before you create a Database Cloud Service instance you can choose to create a Secure Shell (SSH) public/private key pair. The SSH keys are used to facilitatesecure access to the compute nodes that support your database deployments.



QUESTION 11Which statement is true about Database Schema Service and Database as a Service in Oracle Public Cloud?

A. Database Schema Service requires no database administrators to administer the database.

B. Database as a Service (DBaaS) requires no database administrators to administer the database.

C. Database as a Service (DBaaS) provides complete database instances with shared control between the subscriber DBA and Oracle Support.

D. Database Schema Service provides database schemas with shared control between the subscriber DBA and Oracle Support.


Explanation/Reference:

QUESTION 12You want to make sure that your database administrators have a convenient way to monitor your DBaaS instance. To do so, you need to enable the Oracle DBaaSMonitor.

How would you enable the Oracle DBaaS Monitor?

A. Use the enable_dbaas_monitor command.

B. Create an SSH tunnel to port 443.

C. Disable the ora_p2_httpssl security rule in Oracle Compute Cloud Service Console.

D. Use the Oracle GlassFish Server Administration Console.

E. Add ODBM access to each DBA’s user profile.


Explanation/Reference:To access Oracle DBaaS Monitor when the HTTPS port is blocked, you must create an SSH tunnel to port 443 on the compute node hosting the DBaaS Monitor.

Note: How you access Oracle DBaaS Monitor depends on whether the HTTPS port (443) has been unblocked. When a Database Cloud Service deployment is firstcreated, the HTTPS port is blocked to ensure network security

Incorrect Answers:C: You should enable the ora_p2_httpssl security rule, not disable it.


When a database deployment is created, the following Oracle Compute Cloud Service security rules are created, but set to a disabled status:* ora_p2_httpssl, which controls access to port 443, the port used for HTTPS connections, including Oracle REST Data Services, Oracle Application Express, andOracle DBaaS Monitor...etc.

To enable access to a compute node port, you enable the appropriate security rule.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/access-dbaas-monitor.html

QUESTION 13You are monitoring resource usage on your Database Cloud Service.

What two resource usage metrics can you find on the Instance Overview page?

A. number of days left on your subscription

B. number of processes allocated

C. I/O from reads and writes

D. memory

E. storage

F. number of current users

Correct Answer: DESection: (none)Explanation

Explanation/Reference:The Overview page includes graphs that plot the data values for the top metrics for the past 7 days. The type of data collected and shown depends on the type ofservice. For example, for Oracle Database Cloud Service, the graphs show Storage Used and Maximum Storage Used.

QUESTION 14You are preparing the storage volume for use in an instance.

Which two tasks must you perform?

A. Point to a mount point that has existing files and directories.

B. Connect to the DBaaS instance to which you attached the storage volume by using ssh or PuTTY as the opc user.

C. Create a mount point on your instance.

D. Connect to the DBaaS instance to which you attached the storage volume by using ssh or PuTTY as the oracle user.


Correct Answer: ACSection: (none)Explanation

Explanation/Reference:To add temporary storage to a database deployment:1. Use the Create Storage Volume wizard in the Compute Cloud Service console to create a storage volume.2. Attach the storage volume to the Compute Cloud Service instance on which the compute node is running. When you attach the storage volume, it is assigned adisk number. Note down this disk number for later use.3. Connect as the opc user to the compute node.4. Start a root-user command shell$ sudo -s #5. Confirm the addition of the storage volume by using the ls command:# ls /dev/xvd*6. Create a single, primary partition that occupies the entire storage volume by using the fdisk command.7. Create a file system on the partition by using the mkfs command.8. Create a directory to use as the mount point for the partition by using the mkdir command.9. Mount the partition on the directory you just created by using the mount command.10. Set the ownership and permissions of the mount-point directory appropriately by using the chown and chmod commands.11. Exit the root-user command shell.


QUESTION 15You want to perform an on-demand backup.

Which two statements are true?

A. Connect to the instance’s VM as the opc user.

B. Connect to the instance’s VM as the oracle user.

C. Disable the backup configuration (crontab).

D. Enable the backup configuration (crontab).

Correct Answer: ADSection: (none)Explanation

Explanation/Reference:A: Creating an On-Demand Backup by Using the bkup_api UtilityYou can use the bkup_api utility to create an on-demand backup of a database deployment hosting a single-instance database or an Oracle Data Guard


configuration.1. Connect as the opc user to the compute node. In a Data Guard configuration, connect to the compute node hosting the primary database.2. Start a root-user command shell:$ sudo -s #3. You can choose to have the backup follow the current retention policy, or you can choose to create a long-term backup that persists until you delete it:• To create a backup that follows the current retention policy, enter the following bkup_api command:# /var/opt/oracle/bkup_api/bkup_api bkup_start• To create a long-term backup, enter the following bkup_api command:# /var/opt/oracle/bkup_api/bkup_api bkup_start --keep1. Exit the root-user command shell and disconnect from the compute node:# exit$ exit

D: If some activity you want to perform requires you to temporarily disable regularly scheduled backups, you can do so by removing the scheduling information fromthe system-wide /etc/crontab file.


QUESTION 16You get complaints from users of several different applications that performance has degraded over time.

These applications run in this configuration:1. There are three different databases and database instances.2. Two of the poorly performing applications run in the same Pluggable Database (PDB) in an Oracle 12c multitenant Container Database (CDB) with four PDBs.3. One of the poorly performing applications runs in a different PDB in the same CDB.4. One of the poorly performing applications runs in an Oracle 12c non-CDB, which also hosts other applications.5. You have the Oracle Resource Manager configured for the CDB, all PDBs, and the non-CDB.6. Each application has a separate consumer group associated with the sessions that are running that application.

A check of wait events for the sessions belonging to these applications shows that the sessions are waiting longer and that there are more sessions from otherapplications in the same database instance.

You wish to avoid scaling up your Database as a Service (DBaaS) instance in Oracle Cloud.

Which three should you check and possibly reconfigure to avoid the need to scale up the DBaaS instance?

A. Check the shares allocated only to the consumer group in the non-CDB that is used by the poorly performing application.

B. Check the shares allocated to all consumer groups in the non-CDB.

C. Check the CDB plan to configure the shares allocated to all PDBs, including the PDB that contains the two poorly performing applications.

D. Check the PDB plan for the PDB that is hosting the two poorly performing applications.


E. Check the CDB plan only to configure the shares allocated to the PDB that contains the two poorly performing applications.

F. Check the PDB plan for all the PDBs in the CDB, including the PDB that is hosting the two poorly performing applications.

Correct Answer: ADESection: (none)Explanation

Explanation/Reference:References: https://docs.oracle.com/database/121/ADMIN/cdb_dbrm_em.htm

QUESTION 17Which are two of the tasks that must be performed to enable SQL*NET access for your DBaaS database instance over SSL?

A. You must open a port on the virtual machine (VM) that is hosting the instance.

B. You use Net Manager (NETMGR) to configure a database alias and set the connect string.

C. You use Oracle Connection Manager to configure the required network settings.

D. You must configure SSL support on the instance.

Correct Answer: ABSection: (none)Explanation

Explanation/Reference:SQL*Net is Oracle's remote data access protocol that enables client-server and server-server communications across networks.An Oracle client connects to the server using the port address of the listener, which is normally defined as TCP port 1521 during Oracle installation.

Oracle Net Manager is a utility used for configuring SQL*Net.


References: http://www.orafaq.com/wiki/Net_Manager

QUESTION 18You have an Oracle Database 12c on-premise non-CDB database that is running on the AIX platform.

Which two methods can be used to migrate the on-premise database to a database that is running in a Database as a Service (DBaaS) instance on Oracle Cloud?



A. Remote Cloning

B. Transporting Tablespaces by using RMAN convert

C. Data Pump

D. Transporting Tablespaces by using RMAN “backup from platform”

E. scp file copy


Explanation/Reference:You can migrate Oracle Database 12c non-CDB databases from on-premises to Oracle Database 12c databases in Oracle Database Cloud using several differentmethods including:

* Data Pump Conventional Export/ImportThis method can be used regardless of the endian format and database character set of the on-premises database.

* Remote Cloning (non-CDB)

This method can be used only if the on-premises platform is little endian, the on-premises database release is 12.1.0.2 or higher, and the on-premises databaseand Database Cloud Service database have compatible database character sets and national character sets.

You can use the remote cloning method to copy an Oracle Database 12c non-CDB on-premises database to your Oracle Database 12c database in the cloud.

* RMAN CONVERT Transportable Tablespace with Data PumpThis method can be used only if the database character sets of your on-premises database and Oracle Database Cloud Service database are compatible.

* RMAN Cross-Platform Transportable Tablespace Backup Sets

This method can be used only if the database character sets of your on-premises database and Oracle Database Cloud Service database are compatible.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/mig-12c-non-cdb-12c.html

QUESTION 19


Your Database as a Service (DBaaS) instance hosts a multitenant container database (CDB) with four pluggable database (PDB) tenants.

Users of an application in one PDB and users of another application in another PDB complain of poor performance.

Investigation shows that the application sessions are not using excessive CPU nor are they requesting an unusual amount of I/O.

Which two steps should you perform to resolve this problem?

A. Add storage to the DBaaS instance.

B. Add CPU to the DBaaS instance.

C. Examine the shares of resources allocated to each PDB within the CDB.

D. Examine the shares of resources allocated to each consumer group within all four PDBs.

E. Examine the shares of resources allocated to each consumer group within the PDBs that contain the two applications.

F. Add memory to the DBaaS instance.

Correct Answer: EFSection: (none)Explanation


QUESTION 20Which two can be increased to scale up the compute shape of a Database as a Service (DBaaS) instance in Oracle Cloud?

A. Add more memory to the DBaaS instance by using the Scale up button on the DBaaS Instance Overview page.

B. Add more storage to the DBaaS instance by using the Scale up button on the DBaaS Instance Overview page.

C. Add more network adaptors (NICs) to the storage network used by the DBaaS instance by using the Scale Up button on the DBaaS Instance Overview page.

D. Add more network adaptors (NICs) to the public access network used by the DBaaS Instance by using the Scale Up button on the DBaaS Instance Overviewpage.

E. Add more CPUs to the DBaaS instance by using the Scale Up button on the DBaaS Instance.

Correct Answer: AESection: (none)Explanation

Explanation/Reference:Occasionally, the need to scale arises from some change made to the database or backup configuration after it was created. For example, if the decision to use theIn-Memory Database option was made after database creation, you might need to scale up the compute shape to one of the high-memory options, such as scalingfrom "OC4 - 2 OCPU, 15 GB RAM" to "OC2M - 2 OCPU, 30 GB RAM".


Note: To scale the compute shape for a database deployment:

1) View the overview page for the database deployment:a) Open the Oracle Database Cloud Service console.b) Click the name of the deployment you want to scale.The Oracle Database Cloud Service Overview page is displayed.1. 2. Choose the scaling command.The Scale Up/Down Service overlay is displayed. Note that the overlay includes information about the current compute shape.2. Select a new compute shape.3. Click Yes, Scale Up/Down Service to scale the database deployment.The scaling operation begins. The database deployment is in Maintenance status and unavailable while the scaling operation is in progress.

References: https://docs.oracle.com/cloud-machine/latest/dbcs_dbaas/CSDBI/GUID-457D283C-D890-4B4F-B65C-26D05B4C80CC.htm#CSDBI3339

QUESTION 21You are configuring network connections to your database instance.

What does each network group represent?

A. It is used to allow unrestricted communication among some of your DBaaS instances by using a set of defined policies and access rules.

B. It is used to define load balancing and failover configurations between RAC database instances.

C. It is used to define network connections to the Pluggable Databases (PDBs) within a Container Database.

D. It is used to manage the connections between your external application servers (application servers that you currently use in your business environment) andyour DBaaS instances.

Correct Answer: ASection: (none)Explanation

Explanation/Reference:Network groups provide a method for VMs to be grouped together for communications and firewall rules. You can define network groups to allow VMs within agroup to communicate with each other, while also preventing those VMs from communicating outside the group.

Note:Access rule. Access rules define the permitted paths of communication for VMs that are within a network group. You can define an access rule to enable a specificpath of communication between two network groups, or between a network group and a specified list of IP addresses.

References: http://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/dbaas/OU/IntroDBaaS/ConfiguringNetworkSettings/ConfiguringNetworkSettings.html#section2s2


QUESTION 22Which two statements are true about the Database as a Service (DBaaS) instances and Oracle database instances that are provided by Oracle Public Cloud?

A. A DBaaS instance Virtual Image always provides a pre-created Oracle database.

B. An Oracle database instance that is provided as part of DBaaS runs a different executable than would be run with the same version and release of OracleDatabase on private premises.

C. A DBaaS instance Virtual Image always provides a Linux virtual machine.

D. A DBaaS instance Virtual Image requires customers to install their preferred version on the Oracle database software.

E. Multiple Oracle database instances can run in a DBaaS instance on Oracle Public Cloud.

Correct Answer: CESection: (none)Explanation

Explanation/Reference:C: A During DBaaS instance Virtual Image installation a Linux instance is created and a tarball is dropped into a staging area. The database is not provisioned. Thefile system is not prepared. The network ports are not configured and enabled. True, the virtual instance creation only takes a few minutes but all we are doing isprovisioning a Linux instance and copying a tarball into a directory.

E: Oracle Database Cloud Service enables Database Containerization. Oracle Database 12c includes the Oracle Multitenant option for managing PluggableDatabases.

Incorrect Answers:A: When you create a database deployment on Oracle Database Cloud Service using the Virtual Image service level, Oracle Database is not automaticallyinstalled, nor is a database created. You must perform these steps manually after the deployment is created.

B: Oracle Database Cloud Service provides dedicated database instances with Oracle Database 11g, 12.1 and 12.2, with your choice of Standard, Enterprise, HighPerformance, or Extreme Performance packaging.

D: To create a database on a deployment using the Virtual Image service level, you perform these tasks:1. Create storage volumes for the Oracle Database software and for the database files, and then format and mount them.2. Stage the Oracle Database software on the mount point you created for it.3. Create a database and start the database instance.4. Start the listener for the database instance.5. Create Oracle Compute Cloud Service security rules to permit access to services of the database from outside the Oracle Cloud.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/create-db-virtual-image-deployment.html#CSDBI-GUID-29290A81-8798-4988-848E-77A1BE0CF08Ahttps://cloud.oracle.com/database/enterprise/features

QUESTION 23


You are creating a new Database as a Service (DBaaS) instance.

Which statement is true about connections that are created by default?

A. A default network connection is created to your application server.

B. A default network connection is created to the other instances that you have created.

C. No default connections are created to other DBaaS instances or to any external servers.

D. All network connections are pre-created within DBaaS.



QUESTION 24You get complaints from users of several different applications that performance has degraded over time.

These applications run in this configuration:1. There is one database and database instance, which is an Oracle 12c multitenant Container Database (CDB) with five Pluggable Databases (PDBs).2. One of the poorly performing applications run in one of the PDBs.3. One of the poorly performing applications runs in a different PDB in the same CDB.4. You have the Oracle Resource Manager configured for the CDB only.5. Each PDB has all sessions in one consumer group.

A check of wait events for the sessions belonging to these applications shows that the sessions are waiting longer and that there are more sessions from otherapplications in the same database instance.

You wish to avoid scaling up your Database as a Service (DBaaS) instance in Oracle Cloud.

Which four should you check and possibly reconfigure to avoid the need to scale up the DBaaS instance?

A. Modify the users that are using each application so that their sessions are associated with the correct consumer group in the PDB that is hosting theirapplication.

B. Check the CDB plan to configure the shares allocated to all PDBs, including the PDBs that contain the two poorly performing applications.

C. Check the CDB plan only to configure the shares allocated to the PDBs that contain the two poorly performing applications.

D. Create separate consumer groups for the sessions for all applications in the PDB plans for the PDBs that are hosting the two poorly performing applications.

E. Check the PDB plan for all the PDBs in the CDB, including the PDB that is hosting the two poorly performing applications.

F. Create a PDB plan for each PDB in the CDB that has poorly performing applications.


G. Create a separate CDB plan for each PDB that has poorly performing applications.

Correct Answer: ABDFSection: (none)Explanation


QUESTION 25What are two things can you do on the My Services Dashboard page?


A. You can customize the metric icon for each valid service.

B. You can add a data center and identity domain to your Cloud account.

C. You can activate services for the current data center and identity domain.

D. You can check the overall status of your active services for the current data center and identity domain.

Correct Answer: CDSection: (none)Explanation

Explanation/Reference:The My Services Dashboard shows information limited to one identity domain in your account.

References: Using Oracle Database Cloud Service (February 2017), page 8-26https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/using-oracle-database-cloud-service.pdf

QUESTION 26The first step to connecting to Oracle Cloud is generating an SSH key pair.

To generate a key pair on a Unix or Linux machine, you would run the ssh-keygen utility.

What should be the number of bits in the key that must be created?


A. 1014

B. 2024

C. 2048

D. 1234


Explanation/Reference:To generate an SSH key pair on UNIX and UNIX-like platforms using the ssh-keygen utility:1. Navigate to your home directory:

$ cd $HOME2. Run the ssh-keygen utility, providing as filename your choice of file name for the private key:$ ssh-keygen -b 2048 -t rsa -f filenameThe ssh-keygen utility prompts you for a passphrase for the private key.

4. Enter a passphrase for the private key, or press Enter to create a private key without a passphraseEtc.


QUESTION 27Which three will be supported after migrating an on-premises database to a Database as a Service (DBaaS) instance on Oracle Cloud?

A. increased security of application roles

B. reduction in operational costs

C. ability to increase capacity on demand

D. provisioning of application testing

E. centralization of database management

Correct Answer: CDESection: (none)Explanation

Explanation/Reference:References: https://www.oracle.com/database/solutions/private-dbaas.html

QUESTION 28Which three statements are true about SSH tunnels in a Database as a Service (DBaaS) Cloud configuration?


A. A separate SSH tunnel is required for each port that is required for the environment.

B. The SSH tunnel should include all required ports for the environment.

C. The available protocols include ssh-2 DSA.

D. The default protocol is ssh-1 RSA.

E. The SSH tunnel is opened automatically by the Cloud Services VPN and remains open.

F. The SSH tunnel must be opened manually and must remain open.

Correct Answer: ACFSection: (none)Explanation

Explanation/Reference:C:


Incorrect Asnwes:B: You can only specify the source port, and the destination port.D: The default protocol is ssh-2 RSA-

References: http://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/javaservice/JCS/JCS_SSH/create_sshkey.htmlhttps://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/create-ssh-tunnel.html

QUESTION 29Which three statements are true about the service levels provided by Database as a Service (DBaaS)?

A. The Virtual Image service level provides a pre-created database.

B. The Virtual Image service level provides tools for backups and patching.

C. The automated service provides a pre-installed virtual machine image.

D. The automated service provides a pre-created database.

E. The cloud tooling within the automated service level provides a tool for point-in-time database recovery.

Correct Answer: BDESection: (none)Explanation

Explanation/Reference:Incorrect Answers:A: When you create a database deployment on Oracle Database Cloud Service using the Virtual Image service level, Oracle Database is not automaticallyinstalled, nor is a database created.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/create-db-virtual-image-deployment.html

QUESTION 30You created a Database as a Service (DBaaS) instance. This action also created a virtual machine and configured it for the DBaaS instance. It also created twouser accounts. One of the users is opc.

Which three functions can the opc user perform?

A. dropping the database instance

B. any root-user operation

C. database tuning

D. database backup and recovery

E. administrative operations in the virtual machine

F. operations that requires root-user access


Correct Answer: DEFSection: (none)Explanation

Explanation/Reference:Opc is the system administrator account you use to connect to the compute node using SSH. This user can use the sudo command to perform operations thatrequire root-user access.

Connect as the user opc to perform operations that require root access to the compute node, such as backing up or patching; this user can use the sudo commandto gain root access to the compute node.

Incorrect Answers:B: The root user is the root administrator for the system. You do not have direct access to this account. To perform operations that require root-user access, usethe sudo command as the opc user.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/linux-user-accounts-rac.htmlUsing Oracle Database Cloud Service (February 2017), page 5-3https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/using-oracle-database-cloud-service.pdf

QUESTION 31You want to migrate an Oracle Database 11.2.0.2 on-premises database to the Oracle Database 11g database of the Database as a Service (DBaaS) instance onOracle Cloud. A subset of the data that you want to transfer includes data stored in LONG data type columns.

All required data is contained in a dedicated tablespace. The tablespace is 100 GB in size and has 20% free space.

The client wants the data migrated in the shortest possible time to minimize impact on end users.

Select the most appropriate migration method to meet this requirement.

A. Data Pump TDB

B. Data Pump TTS

C. SQL*Loader Direct Path

D. conventional export/import

E. Remote Cloning


Explanation/Reference:The Data Pump Transportable Tablespace can be used only if the on-premises platform is little endian, and the database character sets of your on-premises


database and Oracle Database Cloud Service database are compatible.

The Transportable Tablespace method is generally much faster than a conventional export/import of the same data because the data files containing all of theactual data are simply copied to the destination location.

Incorrect Answers:C: Data Pump TDB is not supported in this scenario.D: The data pump conventional export/import method is simple to implement, provides the broadest cross-platform support and enables you to physically re-organize your target database; however, the time and resources required for export and import may rule out this approach for situations with large databases orlimited timeframes.E: Remote cloning is not supported in this scenario.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/mig-11g-11g.html

QUESTION 32You are using access rules to control network traffic among your DBaaS instances.

Which statement is true about access rules?


A. They are used only for configuring external server access to DBaaS and do not impact how network groups communicate.

B. They define a specific communication path, which consists of a source, destination, and protocol-port combination over which communication is allowed.

C. They are used to map an external user to a database user to allow the user to communicate with and access the database.

D. They are used to encrypt communication between DBaaS instances.


Explanation/Reference:On the Access Rule you can define the following:

SourceHosts from which traffic is allowed. Possible values are DB, PUBLIC-INTERNET, or a custom value in the form of an IP address.DestinationSecurity list to which traffic is allowed. This will be DB, the ora_db security list for the deployment.Ports


Port or range of ports for the rule.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/service-console-access-rules-page.html

QUESTION 33Identify the access that is initially available to connect to your Database as a Service (DBaaS) environment.

A. telnet on port 23

B. SSH on port 22

C. SSL/TLS on port 443

D. Cloud Control on port 7799

E. Enterprise Manager on port 1158


Explanation/Reference:By default, network access to the deployment is restricted to SSH connections on port 22.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/network-access-vi.html

QUESTION 34Which two problems indicate that you should consider scaling up your Database as a Service (DBaaS) instance that hosts an Oracle Database 12c multitenantcontainer database (CDB) with four pluggable databases (PDBs)?

A. shortage of CPU for two PDBs in the CDB

B. shortage of I/O bandwidth for the parallel queries that are issued by the CDB instance

C. shortage of memory for the DBaaS instance

D. shortage of memory in the Shared Pool of the CDB

E. shortage of CPU for the DBaaS instance

Correct Answer: CESection: (none)Explanation

Explanation/Reference:References: https://docs.oracle.com/cloud-machine/latest/dbcs_dbaas/CSDBI/GUID-457D283C-D890-4B4F-B65C-26D05B4C80CC.htm#CSDBI3339

QUESTION 35


You wish to perform database recovery and restore the most recent backup.

Which two steps will you perform?

A. Disable the scheduled backup configuration.

B. Disable the scheduled recovery configuration.

C. Perform the restore with the dbaascli orec --args –latest command.

D. Perform the restore with the dbaascli orec –-args –last command.

E. Perform the restore with the dbaascli orec –-args –stop -last command.

F. Perform the restore with the dbaascli orec –-args –close –last command.


Explanation/Reference:A: Note: If some activity you want to perform requires you to temporarily disable regularlyscheduled backups, you can do so by removing the scheduling information from thesystem-wide /etc/crontab file.

C: You can use the dbaascli utility to restore from the most recent backup and performcomplete recovery on a database deployment hosting a single-instance database:1. Connect as the opc user to the compute node.2. Start a root-user command shell:

$ sudo -s#

3. Restore the most recent backup and perform complete recovery using the orec subcommand of the dbaascli utility:# dbaascli orec --args -latestThe restore and recover process performs these steps:Shuts down the databaseExtracts and restores configuration filesPrepares for recoveryPerforms the recoveryRestarts the database instance after recovery

1. Exit the root-user command shell:# exit$



QUESTION 36How do you access “none default ports” on your DBaaS VM server?

A. Review a file called portlist.ini in your installation directory to acquire the list of “none default ports” that are assigned to your VM server.

B. You file a service request with your DBaaS support team to have the “none default ports” opened for use.

C. You create an SSH tunnel to the “none default port”.

D. All communication to DBaaS services must be configured only by using the default ports that are assigned to your VM server during the installation of yourDBaaS instances.


Explanation/Reference:To enable access to a compute node port, you enable the appropriate security rule. When you enable one of the predefined security rules, the given port on thecompute node is opened to the public internet. To enable access to a different port, or restrict access to a port, you must create a security rule.

Note: When a database deployment is created, the following Oracle Compute Cloud Service security rules are created, but set to a disabled status.ora_p2_dbconsole, which controls access to port 1158, the port used by Enterprise Manager 11g Database Control.ora_p2_dbexpress, which controls access to port 5500, the port used by Enterprise Manager Database Express 12c.ora_p2_dblistener, which controls access to the port used by SQL*Net.ora_p2_http, which controls access to port 80, the port used for HTTP connections.ora_p2_httpssl, which controls access to port 443, the port used for HTTPS connections, including Oracle REST Data Services, Oracle Application Express, andOracle DBaaS Monitor.

References: References: Using Oracle Database Cloud Service (February 2017), page 3-7https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/using-oracle-database-cloud-service.pdf

QUESTION 37Which statement is true about Database Schema Service and Database as a Service in Oracle Public Cloud?

A. Database as a Service (DBaaS) requires no database administrators to administer the database.

B. Database Schema Service requires a database administrator to administer the schemas.

C. Database as a Service (DBaaS) provides complete dedicated database instances with full administrative control for a subscriber.

D. Database Schema Service provides database schemas with full administrative control for a subscriber.

Correct Answer: DSection: (none)Explanation


Explanation/Reference:Database Schema Service is an individual service within the Oracle Cloud. Data within an individual Database Schema Service is completely separated from datain all other services in the Oracle Cloud.Database Schema Service administrators can define users for the services that they administer.

References:https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/service-roles-and-users.htmlhttps://docs.oracle.com/cloud/latest/dbcs_schema/CSDBU/GUID-EE7B1EC2-38D5-4CE8-8C0F-6DED51776AF1.htm#CSDBU210

QUESTION 38You created your Database as a Service (DBaaS) database instance. Predefined network access rules are also created.

Which two predefined network access rules are created when you created the DBaaS database instance?

A. The ora_p2_ssh access rule for the public-internet network group is created to communicate with the ora_db predefined network group over SSH.

B. The ora_db_public access rules to manage database access through the default port 1521 and the ora_db_admin access rules for SSH connection viaSQL*Net through port 5500 are created.

C. The ora_access db access rule for SSH connection via PuTTY is created to configure network rules and ora_access_console for HTTPS access toOracle Cloud Services Console.

D. No access rules are created by default and users must manually configure all access rules.

E. The ora_p2_dblistener access rule for the public-internet network group (any host on the Internet) is created to communicate with the ora_db predefinednetwork group over SQL*Net.


Explanation/Reference:When a database deployment is created, the following Oracle Compute Cloud Service security rules are created, but set to a disabled status.

ora_p2_dbconsole, which controls access to port 1158, the port used by Enterprise Manager 11g Database Control.ora_p2_dbexpress, which controls access to port 5500, the port used by Enterprise Manager Database Express 12c.ora_p2_dblistener, which controls access to the port used by SQL*Net.ora_p2_http, which controls access to port 80, the port used for HTTP connections.ora_p2_httpssl, which controls access to port 443, the port used for HTTPS connections, including Oracle REST Data Services, Oracle Application Express, andOracle DBaaS Monitor.

References: References: Using Oracle Database Cloud Service (February 2017), page A-5https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/using-oracle-database-cloud-service.pdf

QUESTION 39You want to apply a patch to your Oracle Database Cloud – Database as a Service.


What command will you execute to patch your database instance?

A. dbaascli dbpatchm --run -config

B. dbaascli dbpatchm --run -setup

C. dbaascli dbpatchm --run -apply

D. dbaascli dbpatchm --run -patch


Explanation/Reference:Options of the command: dbaascli dbpatchmapply – applies the patch.clonedb – applies a patch to a test deployment.list_patches – displays a list of available patches.list_tools – checks whether any cloud tooling updates are available.prereq – checks the prerequisites of a patch.rollback – rolls back the last deployment patch.switchback – restores database software to a prior state.toolsinst – downloads

References: References: Using Oracle Database Cloud Service (February 2017), page D-1https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/using-oracle-database-cloud-service.pdf

QUESTION 40You want to control network traffic among your DBaaS instances.

Which two statements are true about network groups?

A. By default, the DBaaS instances in a network group are accessible from hosts outside the network group.

B. You can add a DBaaS instance to a network group, but this enables communication only within this network group.

C. You can add a DBaaS instance to a network group, thus enabling communication with all other DBaaS instances both inside and outside the network group.

D. You can create a network group to enable unrestricted communication among your DBaaS instances.

E. DBaaS prevents network groups from having unrestricted communication among DBaaS instances.

Correct Answer: BESection: (none)Explanation


Explanation/Reference:Network groups provide a method for VMs to be grouped together for communications and firewall rules. You can define network groups to allow VMs within agroup to communicate with each other, while also preventing those VMs from communicating outside the group.

Note:Access rule. Access rules define the permitted paths of communication for VMs that are within a network group. You can define an access rule to enable a specificpath of communication between two network groups, or between a network group and a specified list of IP addresses.

References: http://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/dbaas/OU/IntroDBaaS/ConfiguringNetworkSettings/ConfiguringNetworkSettings.html#section2s2

QUESTION 41You use GUI tools on the Virtual Machine to create and administer the Database as a Service (DBaaS) databases.

You wish to use the Oracle Database Configuration Assistant (DBCA) to create a database instance. To run DBCA, you will need to use an SSH connection.

You need to perform several steps to establish this connection in DBCA and to create the database.

What are two of these steps?


A. Connect to the DBaaS instance with the SSH terminal session as the oracle user.

B. Configure a PuTTY or SSH session to perform X11 forwarding.

C. Install an Xterminal program if required.

D. Update the tnsnames.ora file with the name of the service to which you want to connect.

Correct Answer: ABSection: (none)Explanation

Explanation/Reference:Example: To create a database into your Oracle Database Cloud Service1. You have created a PuTTY definition for connecting through an SSH tunnel to your Database Cloud Service (DBaaS) instance. Now open this definition toconnect to the VM.


2. Because this is not the first time you are connecting to the VM, the SSH utility does not prompt you to confirm the public key. If it were the first time, the SSHutility would have prompted you to confirm the public key. You would have confirmed by clicking Yes.

3. You can now launch DBCA either in silent mode or in graphical mode.


References: http://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/dbaas/OU/IntroDBaaS/UsingDBATools/UsingDBATools.html

QUESTION 42Which two must be true when you migrate an Oracle Database 12.1.0.2 non-CDB to a database that is running in a Database as a Service (DBaaS) instance onOracle Cloud by using the Remote Cloning method?

A. The non-CDB may be opened in READ WRITE mode as long as ARCHIVELOG is enabled.

B. The database link owner must have the CREATE PDB system privilege.

C. The source platform must have the same endian format.

D. The non-CDB must be in archivelog mode.

E. The non-CDB must be opened in READ ONLY mode.

F. The database link owner must have the CREATE PLUGGABLE DB system privilege.

Correct Answer: EFSection: (none)Explanation

Explanation/Reference:To migrate an Oracle Database 12c non-CDB database to a Database Cloud Service database deployment using the remote cloning method, you perform thesetasks:1. On the on-premises database host, invoke SQL*Plus and set the on-premises database to READ ONLY mode.2. On the Database Cloud Service compute node, invoke SQL*Plus and create a database link that enables a connection to the on-premises database.3. On the Database Cloud Service compute node, execute the CREATE PLUGGABLE DATABASEcommand to clone the on-premises non-CDB database.4. On the Database Cloud Service compute node, execute the $ORACLE_HOME/rdbms/admin/noncdb_to_pdb.sql script.5. On the Database Cloud Service compute node, open the new PDB by executing the ALTER PLUGGABLE DATABASE OPEN command.6. Optionally, on the on-premises database host invoke SQL*Plus and set the on-premises database back to READ WRITE mode.

You can use this method only if the on-premises platform is little endian, the on-premises database release is 12.1.0.2 or higher, and the on-premises databaseand Database Cloud Service database have compatible database character sets and national character sets.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/mig-remote-cloning-non-cdb.html

QUESTION 43Which two tasks can you perform on the Database Cloud Service Instance View page?

A. You can add pluggable databases (PDBs) to the database.

B. You can decrease the storage of an instance.

C. You can see patching information.

D. You can create new users to access an instance.


E. You can scale up to increase the shape of the current instance.

Correct Answer: CDSection: (none)Explanation

Explanation/Reference:References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/service-console-services-page.html

QUESTION 44Which three are ways to scale a Database as a Service (DBaaS) instance that is hosting three Oracle 12c databases?

A. Add additional virtual network interfaces (VNICs) to the DBaaS instance.

B. Increase the MEMORY_TARGET parameter value in each database instance that is running on the DBaaS instance.

C. Increase the CPU_COUNT parameter value in each database instance that is running on the DBaaS instance.

D. Increase the number of CPUs allocated to the DBaaS instance.

E. Add storage to the DBaaS instance.

F. Use the Oracle Database 12c In-Memory database option in each database instance that is running on the DBaaS instance.

G. Increase the memory allocated to the DBaaS instance.

Correct Answer: DEGSection: (none)Explanation


QUESTION 45You are migrating an Oracle Database 11.2.0.2 on-premise database to an Oracle Database Cloud Service (Database as a Service) that provides a pre-createdOracle Database 11.2.0.4 database.

Which two migration methods are possible?

A. Data Pump Transportable Database (TDB) export/import

B. Remote Cloning

C. Data Pump Transportable Tablespace (TTS) export/import

D. RMAN Transportable Tablespace (TTS)

Correct Answer: CD


Section: (none)Explanation

Explanation/Reference:You can migrate an on-premises source database to the database deployment on Oracle Database Cloud Service using the Data Pump Transportable Tablespace(TTS) method.You can migrate an on-premises source database to a database deployment on Oracle Database Cloud Service using the RMAN Transportable Tablespace (TTS)with Data Pump method.

Incorrect Answers:A: Data Pump Transportable Database is not possible.B: Remote cloning is not possible.

References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/mig-11g-11g.html

QUESTION 46Which two statements are true about the sequence of steps that are performed when creating a Database as a Service (DBaaS) instance in Oracle Public Cloud?

A. A Secure Shell (SSH) key is provided by Oracle for accessing the DBaaS environment as the first step in creating a DBaaS instance.

B. The billing frequency depends on the Oracle database software edition that is selected for the DBaaS instance.

C. The public SSH key is provided when configuring the database in the DBaaS instance.

D. Storage configuration must be selected for the DBaaS instance.

E. The database that is configured may be an Oracle 11g database.


Explanation/Reference:E: Onwizard Software Release page page to select the Oracle Database software release that you want to run on your instance.


Note: When you create a database instance, you use the Create Database Cloud Service wizard, which steps you through the process of making the choices thatproduce a service instance tailored to your needs. These choices include:

Service LevelBilling FrequencyOracle Database Release VersionOracle Database EditionComputing PowerDatabase StorageBackup and Recovery Configuration

Incorrect Answers:B: Use the Subscription Type page, of the Create Database Cloud Service wizard, to select the service level and billing frequency.


D: Storage is not configured. You configure the Instance, the Database, and Backup and recovery.

References: http://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/dbaas/obe_dbaas_creating_an_instance/obe_dbaas_creating_an_instance.html


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