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1. True/False. Database Resource Manager can define the degree of parallelism for a
Consumer Group. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. Database Resource Manager can define the degree of parallelism
for a Consumer Group.
2. Which of the following are part of the data quality features of Oracle Warehouse
Builder? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Data profiling (*)
Exception reporting
Match-merge (*)
Extraction tools
Incorrecto Incorrect. Data profiling and match-merge are part of the data quality
features of Oracle Warehouse Builder.
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3. True/False. Oracle Exadata Database Machine combines storage and processing.
Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. The Oracle Exadata Database Machine combines storage with
processing.
4. Which of the following can be used transparently by applications, without having
to change the application code? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Oracle OLAP (*)
RAC (*)
Plan stabilization (*)
Materialized views (*)
Incorrecto Incorrect. Materialized views, Oracle OLAP, plan stabilization and RAC
can all be used transparently, without having to make changes to an application.
7/27/2019 Presales Data Warehousing
3/78
5. How many Exadata cells can be stored in a rack? Marcar para Revisin
(1) Puntos
18 (*)
2
32
16
24
Incorrecto Incorrect. You can store up to 18 Exadata cells in a rack.
6. Interval partitioning delivers which of the following benefits? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Improved performance versus range partitions.
Automatic creation of new partitions, based on a length of time. (*)
Automatic transfer of older partitions to reduced cost storage.
The ability to partition data based on a date. (*)
7/27/2019 Presales Data Warehousing
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Correcto Correct. Interval partitioning is based on a date, and can automatically
create new partitions based on a length of time.
7. Which features included in the Oracle Exadata Database Machine contribute toimproved availability? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Redundant switches (*)
RAC (*)
ASM (*)
Redundant power supplies (*)
Incorrecto Incorrect. Redundant power supplies and switches, ASM and RAC allcontribute to the high availability of the Oracle Exadata Oracle Database Machine.
8. Which of the following dimensions is included in most data warehouses? Marcar
para Revisin
(1) Puntos
Cost dimension
Time dimension (*)
Location dimension
7/27/2019 Presales Data Warehousing
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Product dimension
Incorrecto Incorrect. Most data warehouses include a time dimension.
9. Which of the following statements are true about composite partitioning? Marcar
para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Composite partitioning can use different partitioning methods for each level. (*)
Composite partitioning has to use partitioning methods for each level.
Composite partitioning has more than one level of partitions. (*)
Composite partitioning always uses different partitioning methods for each level.
Incorrecto Incorrect. Composite partitioning has more than one level, and can (but
does not have to) use different partitioning methods for each level.
10. For OLTP data, it is a good practice to compress _____. Marcar para Revisin
(1) Puntos
Your largest tables
Some of your B*-tree indexes
7/27/2019 Presales Data Warehousing
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All data and indexes
Some of your bit-mapped indexes
Your largest tables AND some of your B*-tree indexes (*)
Incorrecto Incorrect. It makes sense to compress your largest tables and some of
your B*-tree indexes for an OLTP database.
11. With Database Resource Manager, you can _____. Marcar para Revisin(1) Puntos
(Seleccione todas las respuestas correctas)
Specify the amount of parallelism for a resource group. (*)
Specify the maximum number of concurrent operations for a resource group (*)
Limit access to particular data for a resource group.
Limit resource consumption for a resource group (*)
Incorrecto Incorrect. With Database Resource Manager you can specify the
maximum number of concurrent operations and the amount of parallelism for aresource group, as well as limit the resource consumption for a resource group.
12. Exadata Storage Servers improve performance in which ways? Marcar para
Revisin
7/27/2019 Presales Data Warehousing
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(1) Puntos
(Seleccione todas las respuestas correctas)
Reducing the amount of rows returned to the server (*)
More efficient memory usage
Reducing the amount of I/O performed
Moving some intelligence to smart scans in the Exadata cells (*)
Correcto Correct. Exadata improves performance by offloading CPU funtions to the
cells and reducing the amount of data returned to the server.
13. The Oracle Warehouse Builder Repository can _____. Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Import metadata from Oracle tools (*)
Synchronize access for multiple users (*)
Lock objects in repository (*)
Import metadata from ERWin (*)
7/27/2019 Presales Data Warehousing
8/78
Incorrecto Incorrect, the Oracle Warehouse Builder repository can import meta data
from Oracle tools and ERWin, among other tools, synchronize multi-user access to
metadata and lock objects in the repository.
14. How can you use data mining with Oracle Warehouse Builder? Marcar para
Revisin
(1) Puntos
To eliminate ETL logging
To identify records to extract
To increase write performance
As a standard transform operation (*)
Correcto Correct. You can use data mining with Oracle Warehouse Builder s a
standard transform operation.
15. Advanced Compression compresses data _____. Marcar para Revisin
(1) Puntos
On subsequent UPDATEs
On initial load (*)
On subsequent INSERTs
On subsequent UPDATEs and INSERTs
7/27/2019 Presales Data Warehousing
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Incorrecto Incorrect. Advanced Compression compresses data when it is initially
loaded, and compresses INSERTs and UPDATEs in batch.
16. Which of the following qualities come with REF partitions? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
With REF partitions, changes to partitioning in the master table are automatically
reflected in related table. (*)
With REF partitions, changes in a master table are not reflected in related tables.
With REF partitions, the sub-partitions are automatically created in a related table
(*)
Incorrecto Incorrect. With REF partitioning, related tables are partitioned to matchthe master table, and subsequent changes in the master table are reflected in the
related tables.
17. What is Oracle's market share in the data warehousing market? Marcar para
Revisin
(1) Puntos
22%
15%
10%
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41% (*)
Incorrecto Incorrect. Oracle's market share for data warehousing is 41%.
18. Compression can be applied to which of the following? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Tables (*)
Indexes (*)
Partitions (*)
Views
Incorrecto Incorrect. You can apply compression to tables, indexes or partitions.
19. True/False. You can use Oracle Data Mining on unstructured data. Marcar para
Revisin
(1) Puntos
Verdadero (*)
Falso
7/27/2019 Presales Data Warehousing
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Incorrecto Incorrect. You can use Oracle Data Mining on unstructured data.
20. Exadata uses smart scans, which are _____. Marcar para Revisin
(1) Puntos
Done in Exadata cells. (*)
Exadata doesn't use smart scans.
Done by the CPU.
Done in memory.
Correcto Correct. Exadata smart scans are done in Exadata cells.
21. What are Oracle Data Integrator templates used for? Marcar para Revisin
(1) Puntos
As reports to monitor ETL activity
To define how to transform data (*)
To optimize data exports
To model SAP applications
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Incorrecto Incorrect. Oracle Data Integrator templates are used to define how to
transform data.
22. SQL Access Advisor can give what type of advice? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Materialized view advice (*)
Partition advice (*)
Compression advice
Index advice (*)
Data Masking
Incorrecto Incorrect. SQL Access Advisor can give advice on partitioning, index
usage and materialized views.
23. Which is the fastest way to load data into an Oracle data warehouse? Marcar
para Revisin
(1) Puntos
Data Pump
SQL*Loader
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External table using CREATE TABLE AS . . . SELECT (*)
Direct Path loading
Incorrecto Incorrect. Using an external table and CTAS is the fastest way to load
data.
24. Which of the following can be used as meta-data clients for Oracle Warehouse
Builder meta-data? Marcar para Revisin
(1) Puntos
Meta-data browser
Custom Java applications
Meta-data browser and OWB GUI
Meta-data browser, OWB GUI and Custom Java applications (*)
OWB GUI
Incorrecto Incorrect. The meta-data browser, OWB GUI and custom Java
applications can be used as meta-data clients for Oracle Warehouse Builder meta-data.
25. Which of the following things can Oracle Data Mining do? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
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Predict customer behaviour (*)
Associate factors with a business issue (*)
Reduce the amount of data used in a data warehouse
Determine associations within a population (*)
Incorrecto Incorrect. Oracle Data Mining can be used to predict customer behaviour,
associate factors with a business issue, or determine associations within a populationto use for future marketing and sales actions.
26. Which of the following statements are true about Oracle OLAP? Marcar para
Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Oracle OLAP uses standard Oracle security. (*)
Oracle OLAP runs in the Oracle database. (*)
Meta data for Oracle OLAP is in a compatible data dictionary.
Oracle OLAP can be used with RAC. (*)
Incorrecto Incorrect. Oracle OLAP runs in the Oracle database and uses standard
Oracle security. Oracle OLAP can be used with RAC, but Oracle OLAP stores its meta
data in the Oracle data dictionary itself.
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27. Which of the following databases are supported by Oracle Data Integrator?
Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Oracle Database (*)
DB2 (*)
Netezza (*)
Teradata (*)
Incorrecto Incorrect. Oracle Database, DB2, Teradata and Netezza are supported by
Oracle Data Integrator.
28. True/False. Adaptive parallelism is ON by default. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. Adaptive parallelism is on by default, based on the
PARALLEL_ADPATIVE_MULTI_USER parameter, which is TRUE by default.
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29. What are some of the benefits provided by ASM? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Performance of raw partitions (*)
Easier to manage than file systems (*)
Automatic striping and mirroring (*)
Low cost option for Oracle database.
Incorrecto Incorrect. ASM is easier to manage than file systems, provides the
performance of raw partitions, and automatically implements striping and mirroring, all
with no extra cost.
30. How many Exadata cells can be used in a grid? Marcar para Revisin
(1) Puntos
128
10
No practical limit (*)
18
36
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Correcto Correct. There is no practical limit to the number of Exadata cells that can
be in a grid.
31. True/False. Oracle Warehouse Builder allows you to graphically map data flows.Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Incorrecto Incorrect. Oracle Warehouse Builder allows you to graphically map data
flows.
32. What type of data is held in the result cache? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Results from PL/SQL function (*)
Aggregate data.
SQL results (*)
Index data
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Incorrecto Incorrect. The result cache holds both SQL results and the results from
PL/SQL functions.
33. True/False. When you use compressed RMAN backups for recovery, you have togo through an extra step of decompression. Marcar para Revisin
(1) Puntos
Verdadero
Falso (*)
Incorrecto Incorrect. You do not have to go through an extra step of decompression
when you use compressed RMAN backups for recovery.
34. Which of the following types of organization are common to data warehouses?
Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Third normal form schema
Snowflake schema (*)
Star schema (*)
Fourth normal form schema
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Incorrecto Incorrect. Star schemas and snowflake schemas are common to data
warehouses.
35. Oracle Data Mining can take advantage of which of the following qualities of theOracle database? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Enterprise Manager (*)
Parallelism (*)
Security (*)
RAC (*)
Incorrecto Incorrect. Data mining can take advantage of standard Oracle features,such as parallelism, RAC, Enterprise Manager and security.
36. How does partitioning help improve availability? Marcar para Revisin
(1) Puntos
Provides resilient failover based on partitions AND reduces maintenance windows by
allowing maintenance on individual partitions.
Provides resilient failover based on partitions AND reduces liklihood of an individual
partition becoming unavailable.
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Provides resilient failover based on partitions.
Reduces maintenance windows by allowing maintenance on individual partitions. (*)
Reduces liklihood of an individual partition becoming unavailable.
Incorrecto Incorrect. By reducing the maintenance window, partitioning can
contribute to the availability of the overall system.
37. Which of the following scenarios would benefit most from using the SQL resultcache? Marcar para Revisin
(1) Puntos
Queries with long run times and small result sets. (*)
All data warehouse style queries.
Queries that are used infrequently.
Queries that work on data which changes frequently.
Incorrecto Incorrect. The SQL result cache will usually benefit long running queries
that return small result sets, and are run frequently on fairly static data.
38. Partitioning can improve performance due to which of the following reasons?
Marcar para Revisin
(1) Puntos
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Partition-wise joins.
Partitioning doesn't improve performance.
Partition pruning by the optimizer.
Partition pruning and partition-wise joins. (*)
Incorrecto Incorrect. Both partition pruning and partition-wise joins improve the
performance of queries with partitioning.
39. Which of the following are best practices for designing a well-performing data
warehouse with Oracle? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Partition your tables appropriately to produce partition wise joins (*)
Create a star schema design (*)
Create a bit-mapped index on foreign key columns in the fact table (*)
Incorrecto Incorrect. Using partitions and star schemas appropriately and includinga bit-mapped index on the fact table all contribute to good performance.
40. What is the minimum recommended amount of memory per CPU core for a data
warehouse? Marcar para Revisin
7/27/2019 Presales Data Warehousing
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(1) Puntos
8 GB
4 GB (*)
2 GB
16 GB
Incorrecto Incorrect. The minimum recommended memory per core is 4 GB.
41. Which of the following maintenance operations can be performed on a partition?
Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Backed up (*)
Taken online or off line (*)
Truncated
Merged (*)
Incorrecto Inorrect. Individual partitions can be taken on or off line, backed up, or
merged with other partitions.
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42. Which of the following require application changes to obtain benefits? Marcar
para Revisin
(1) Puntos
Compression
Partitioning, Materialized views and Compression
You don't have to change any applications to benefit from partitioning, materialized
views or compression (*)
Partitioning
Materialized views
Incorrecto Incorrect. You don't have to change any applications to benefit from
partitioning, materialized views or compression.
43. Oracle Data Mining, compared to SAS, provides which of the following
advantages? Marcar para Revisin
(1) Puntos
Reduced data movement, reduced data duplication and reuse of existing security (*)
Reduced data movement
Reduced data movement, reduced data duplication
Reduced data duplication
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Reuse of existing security
Incorrecto Incorrect. With Oracle Data Mining, you do not have to move data to a
duplicate environment, and you can automatically use the security of the Oracle
Database.
44. How many Knowledge Modules come with Oracle Data Integrator? Marcar para
Revisin
(1) Puntos
100
25
120 (*)
50
200
Incorrecto Incorrect. 120 Knowledge Modules come with Oracle Data Integrator.
45. True/False. Queries have to specify the use of the Database Result Cache to use
it. Marcar para Revisin
(1) Puntos
Verdadero
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Falso (*)
Correcto Correct. The Database Result Cache is used transparently.
46. True/False. Oracle Data Integrator allows you to monitor ETL sessions in real time.
Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Incorrecto Incorrect. Oracle Data Integrator allows you to monitor ETL sessions in
real time.
47. How can you implement near real-time data integration with Oracle DataIntegrator? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
By mining Oracle UNDO segments
By connecting to publish and subscribe JMS message services (*)
By accessing Change Data Capture records from logs (*)
By reading operating system logs
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Incorrecto Incorrect. You can implement near real-time data integration with Oracle
Data Integrator by capturing Change Data Capture records from logs or by connecting
to publish and subscribe JMS message services.
48. Which of the following statements about a data warehouse is NOT true? Marcar
para Revisin
(1) Puntos
A data warehouse consolidates data from multiple sources.
A data warehouse is primarily read only.
A data warehouse is used for trend analysis.
A data warehouse is used for tactical purposes. (*)
Incorrecto Incorrect. A data warehouse is primarily used for strategic purposes.
49. Which of the following are Knowledge Modules that come with Oracle Data
Integrator? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Siebel (*)
MS Excel (*)
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SAP/R3 (*)
SQL Server Triggers (*)
MS Access
Incorrecto Incorrect. SAP/R3, SQL Server Triggers, MS Excel and Siebel are
Knowledge Modules that come with Oracle Data Integrator.
50. Which of the following contributes to the improved performance of the Oracle
Exadata Database Machine? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Proprietary high speed CPUs
Exadata Storage Server (*)
InfiniBand switches (*)
Correcto Correct. The InfiniBand switches allow for greater data flow, while the
Exadata Storage Server reduces the amount of data sent for processing.
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1. Which of the following qualities come with REF partitions? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
With REF partitions, changes in a master table are not reflected in related tables.
With REF partitions, the sub-partitions are automatically created in a related table
(*)
With REF partitions, changes to partitioning in the master table are automatically
reflected in related table. (*)
Incorrecto Incorrect. With REF partitioning, related tables are partitioned to match
the master table, and subsequent changes in the master table are reflected in the
related tables.
2. How many Exadata cells can be used in a grid? Marcar para Revisin
(1) Puntos
10
128
36
No practical limit (*)
18
7/27/2019 Presales Data Warehousing
29/78
Correcto Correct. There is no practical limit to the number of Exadata cells that can
be in a grid.
3. True/False. Queries have to specify the use of the Database Result Cache to use it.
Marcar para Revisin
(1) Puntos
Verdadero
Falso (*)
Correcto Correct. The Database Result Cache is used transparently.
4. What are some of the benefits provided by ASM? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Easier to manage than file systems (*)
Automatic striping and mirroring (*)
Performance of raw partitions (*)
Low cost option for Oracle database.
7/27/2019 Presales Data Warehousing
30/78
Correcto Correct. ASM is easier to manage than file systems, provides the
performance of raw partitions, and automatically implements striping and mirroring, all
with no extra cost.
5. How can you implement near real-time data integration with Oracle Data
Integrator? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
By reading operating system logs
By accessing Change Data Capture records from logs (*)
By mining Oracle UNDO segments
By connecting to publish and subscribe JMS message services (*)
Correcto Correct. You can implement near real-time data integration with Oracle
Data Integrator by capturing Change Data Capture records from logs or by connecting
to publish and subscribe JMS message services.
6. Which of the following can be used transparently by applications, without having to
change the application code? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Materialized views (*)
RAC (*)
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Plan stabilization (*)
Oracle OLAP (*)
Correcto Correct. Materialized views, Oracle OLAP, plan stabilization and RAC can all
be used transparently, without having to make changes to an application.
7. How does compression affect resource utilization? Marcar para Revisin
(1) Puntos
Reduces amount of CPU and disk.
Increases amount of CPU and disk
Reduces amount of disk, increases CPU for loading (*)
Increases amount of disk, reduces CPU for loading.
Incorrecto Incorrect. Using compression can increase the amount of CPU needed
when loading the data, but reduces the amount of disk space used.
8. Which of the following are advantages provided by partitioning? Marcar paraRevisin
(1) Puntos
(Seleccione todas las respuestas correctas)
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Provides added flexibility for maintenance operations. (*)
Reduces storage requirements for tables.
Helps to improve the benefits of parallelism. (*)
Improves performance by reducing I/O. (*)
Incorrecto Incorrect. Partitioning improves performance by reducing I/O,
accelerates the benefits of parallelism and provides added flexibility for maintenance
operations.
9. Oracle Data Mining can take advantage of which of the following qualities of the
Oracle database? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Parallelism (*)
Enterprise Manager (*)
RAC (*)
Security (*)
Correcto Correct. Data mining can take advantage of standard Oracle features, such
as parallelism, RAC, Enterprise Manager and security.
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10. Which of the following maintenance operations can be performed on a partition?
Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Merged (*)
Backed up (*)
Truncated
Taken online or off line (*)
Correcto Correct. Individual partitions can be taken on or off line, backed up, or
merged with other partitions.
11. The Database Result Cache can _____. Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Cache results from queries (*)
Cache returns from PL/SQL functions (*)
Cache PL/SQL code
Cache query execution plans
7/27/2019 Presales Data Warehousing
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Incorrecto Incorrect. The Query Result Cache caches results from queries and
returns from PL/SQL functions.
12. What is Oracle's market share in the data warehousing market? Marcar para
Revisin
(1) Puntos
10%
22%
41% (*)
15%
Incorrecto Incorrect. Oracle's market share for data warehousing is 41%.
13. How many Exadata cells can be stored in a rack? Marcar para Revisin
(1) Puntos
32
16
18 (*)
2
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24
Correcto Correct. You can store up to 18 Exadata cells in a rack.
14. Which of the following types of organization are common to data warehouses?
Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Fourth normal form schema
Third normal form schema
Star schema (*)
Snowflake schema (*)
Correcto Correct. Star schemas and snowflake schemas are common to data
warehouses.
15. True/False. You can use Oracle Data Mining on unstructured data. Marcar para
Revisin
(1) Puntos
Verdadero (*)
Falso
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Correcto Correct. You can use Oracle Data Mining on unstructured data.
16. Advanced Compression compresses data _____. Marcar para Revisin
(1) Puntos
On subsequent INSERTs
On initial load (*)
On subsequent UPDATEs
On subsequent UPDATEs and INSERTs
Correcto Correct. Advanced Compression compresses data when it is initially loaded,
and compresses INSERTs and UPDATEs in batch.
17. Interval partitioning delivers which of the following benefits? Marcar para
Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Improved performance versus range partitions.
Automatic creation of new partitions, based on a length of time. (*)
Automatic transfer of older partitions to reduced cost storage.
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The ability to partition data based on a date. (*)
Correcto Correct. Interval partitioning is based on a date, and can automatically
create new partitions based on a length of time.
18. The Oracle Warehouse Builder Repository can _____. Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Synchronize access for multiple users (*)
Import metadata from ERWin (*)
Lock objects in repository (*)
Import metadata from Oracle tools (*)
Correcto Correct. The Oracle Warehouse Builder repository can import meta data
from Oracle tools and ERWin, among other tools, synchronize multi-user access to
metadata and lock objects in the repository.
19. For OLTP data, it is a good practice to compress _____. Marcar para Revisin
(1) Puntos
Some of your B*-tree indexes
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Your largest tables
Some of your bit-mapped indexes
All data and indexes
Your largest tables AND some of your B*-tree indexes (*)
Correcto Correct. It makes sense to compress your largest tables and some of your
B*-tree indexes for an OLTP database.
20. SQL Access Advisor can give what type of advice? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Materialized view advice (*)
Index advice (*)
Compression advice
Data Masking
Partition advice (*)
Correcto Correct. SQL Access Advisor can give advice on partitioning, index usage
and materialized views.
21. Which of the following products use Oracle Data Mining? Marcar para Revisin
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(1) Puntos
(Seleccione todas las respuestas correctas)
Oracle Real Application Clusters
Oracle Sales Prospector (*)
Oracle CRM
Oracle Retail Data Model (*)
Incorrecto Incorrect. Oracle Sales Prospector and Oracle Retail Data Model both use
Oracle Data Mining.
22. True/False. Oracle Exadata Database Machine combines storage and processing.
Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. The Oracle Exadata Database Machine combines storage withprocessing.
23. Which features included in the Oracle Exadata Database Machine contribute to
improved availability? Marcar para Revisin
7/27/2019 Presales Data Warehousing
40/78
(1) Puntos
(Seleccione todas las respuestas correctas)
ASM (*)
RAC (*)
Redundant power supplies (*)
Redundant switches (*)
Correcto Correct. Redundant power supplies and switches, ASM and RAC all
contribute to the high availability of the Oracle Exadata Oracle Database Machine.
24. Bitmap join indexes produce which of the following benefits? Marcar para
Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Reduced space for index (*)
The ability to use multiple fact tables (*)
Lower memory usage
Faster performance (*)
7/27/2019 Presales Data Warehousing
41/78
Incorrecto Incorrect, bitmap join indexes produce faster performance, use less
space for the index and allow the use of multiple fact tables.
25. True/False. When you use compressed RMAN backups for recovery, you have togo through an extra step of decompression. Marcar para Revisin
(1) Puntos
Verdadero
Falso (*)
Correcto Correct. You do not have to go through an extra step of decompression
when you use compressed RMAN backups for recovery.
26. For data warehousing, you can use RAC in which of the following ways? Marcar
para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
To distribute workload to some of the nodes. (*)
To distribute workload across all nodes. (*)
To provide high availability for all operations. (*)
To provide parallel query servers across nodes. (*)
7/27/2019 Presales Data Warehousing
42/78
Incorrecto Incorrect. You can use RAC with a data warehouse to distribute workload
to all or some of the nodes in a cluster, to use parallel query services across the nodes,
and to provide standard high availability to data warehouse applications.
27. You can improve implementation speed by using which of the following
alternatives? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Customized systems
Oracle Exadata Database Machine (*)
Component hardware
Optimized Warehouse Configurations (*)
Incorrecto Incorrect. Both Optimized Warehouse Configurations and the Oracle
Exadata Database Machine can reduce the time needed to implement a data
warehouse.
28. True/False. Materialized views can be used by queries written before the
materialized view was created. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
7/27/2019 Presales Data Warehousing
43/78
Correcto Correct. Query rewrite allows any query to use a materialized view.
29. What is the minimum recommended amount of memory per CPU core for a data
warehouse? Marcar para Revisin
(1) Puntos
16 GB
2 GB
8 GB
4 GB (*)
Correcto Correct. The minimum recommended memory per core is 4 GB.
30. True/False. Adaptive parallelism is ON by default. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. Adaptive parallelism is on by default, based on the
PARALLEL_ADPATIVE_MULTI_USER parameter, which is TRUE by default.
7/27/2019 Presales Data Warehousing
44/78
31. Which of the following can be used as meta-data clients for Oracle Warehouse
Builder meta-data? Marcar para Revisin
(1) Puntos
Meta-data browser, OWB GUI and Custom Java applications (*)
OWB GUI
Custom Java applications
Meta-data browser and OWB GUI
Meta-data browser
Incorrecto Incorrect. The meta-data browser, OWB GUI and custom Java
applications can be used as meta-data clients for Oracle Warehouse Builder meta-data.
32. Oracle Data Mining, compared to SAS, provides which of the followingadvantages? Marcar para Revisin
(1) Puntos
Reduced data duplication
Reuse of existing security
Reduced data movement, reduced data duplication
Reduced data movement, reduced data duplication and reuse of existing security (*)
Reduced data movement
7/27/2019 Presales Data Warehousing
45/78
Correcto Correct. With Oracle Data Mining, you do not have to move data to a
duplicate environment, and you can automatically use the security of the Oracle
Database.
33. SecureFiles reduces storage costs by _____. Marcar para Revisin
(1) Puntos
Automatic deduplication of data
Automatic deduplication of data AND compression (*)
Compression
Storing images at a lower resolution
Storing images at a lower resolution AND compression
Incorrecto Incorrect. SecureFiles uses compression and deduplication to reduce
storage.
34. What are Oracle Data Integrator templates used for? Marcar para Revisin
(1) Puntos
To optimize data exports
As reports to monitor ETL activity
7/27/2019 Presales Data Warehousing
46/78
To model SAP applications
To define how to transform data (*)
Correcto Correct. Oracle Data Integrator templates are used to define how to
transform data.
35. True/False. The SQL optimizer is aware of Oracle OLAP cubes. Marcar para
Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. The SQL optimizer is aware of Oracle OLAP cubes.
36. Which of the following things can Oracle Data Mining do? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Predict customer behaviour (*)
Determine associations within a population (*)
Reduce the amount of data used in a data warehouse
Associate factors with a business issue (*)
7/27/2019 Presales Data Warehousing
47/78
Correcto Correct. Oracle Data Mining can be used to predict customer behaviour,
associate factors with a business issue, or determine associations within a population
to use for future marketing and sales actions.
37. Which of the following databases are supported by Oracle Data Integrator?
Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Netezza (*)
Teradata (*)
Oracle Database (*)
DB2 (*)
Correcto Correct. Oracle Database, DB2, Teradata and Netezza are supported by
Oracle Data Integrator.
38. True/False. There is a GUI interface to Oracle Data Mining functionality. Marcar
para Revisin
(1) Puntos
Verdadero (*)
Falso
7/27/2019 Presales Data Warehousing
48/78
Incorrecto Incorrect. There is a GUI interface to Oracle Data Mining.
39. Which of the following statements about a data warehouse is NOT true? Marcar
para Revisin
(1) Puntos
A data warehouse consolidates data from multiple sources.
A data warehouse is used for tactical purposes. (*)
A data warehouse is used for trend analysis.
A data warehouse is primarily read only.
Incorrecto Incorrect. A data warehouse is primarily used for strategic purposes.
40. How many Knowledge Modules come with Oracle Data Integrator? Marcar para
Revisin
(1) Puntos
120 (*)
25
100
50
7/27/2019 Presales Data Warehousing
49/78
200
Correcto Correct. 120 Knowledge Modules come with Oracle Data Integrator.
41. Data Guard compresses data _____. Marcar para Revisin
(1) Puntos
When using physical standby
When catching up after a network failure (*)
When using logical standby
Always
Incorrecto Incorrect. Data Guard only compresses data sent over the network whenrecovering from a gap caused by a network failure.
42. SecureFiles allows _____. Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Random writes to SecureFiles (*)
Multiple levels of compression (*)
7/27/2019 Presales Data Warehousing
50/78
Partition-specified compression (*)
Bit level security
Incorrecto Incorrect. SecureFiles allows random writes to SecureFiles, multiple
levels of compression and the ability to specify compression at the partition level.
43. Exadata uses smart scans, which are _____. Marcar para Revisin
(1) Puntos
Done in memory.
Exadata doesn't use smart scans.
Done by the CPU.
Done in Exadata cells. (*)
Correcto Correct. Exadata smart scans are done in Exadata cells.
44. Which of the following require application changes to obtain benefits? Marcar
para Revisin
(1) Puntos
Materialized views
Partitioning, Materialized views and Compression
7/27/2019 Presales Data Warehousing
51/78
Partitioning
Compression
You don't have to change any applications to benefit from partitioning, materialized
views or compression (*)
Correcto Correct. You don't have to change any applications to benefit from
partitioning, materialized views or compression.
45. True/False. Oracle Data Integrator allows you to monitor ETL sessions in real
time. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. Oracle Data Integrator allows you to monitor ETL sessions in real
time.
46. Why does partitioning help parallelism with RAC? Marcar para Revisin
(1) Puntos
Partitioning allows you to do partition-wise joins, which reduces inter-nodeinterconnect traffic. (*)
Partitioning allows you to split data storage across nodes.
Partitioning reduces storage requirments.
7/27/2019 Presales Data Warehousing
52/78
Incorrecto Incorrect. Partitioning allows you to do partition-wise joins, which
reduces inter-node interconnect traffic.
47. True/False. You can perform 'what-if' analysis of potential changes with Oracle
Warehouse Builder. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Incorrecto Incorrect. You can perform 'what-if' analysis of potential changes with
Oracle Warehouse Builder.
48. Which of the following are best practices for designing a well-performing datawarehouse with Oracle? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Create a bit-mapped index on foreign key columns in the fact table (*)
Create a star schema design (*)
Partition your tables appropriately to produce partition wise joins (*)
7/27/2019 Presales Data Warehousing
53/78
Correcto Correct. Using partitions and star schemas appropriately and including a
bit-mapped index on the fact table all contribute to good performance.
49. What are some of the advantages of using Oracle Data Integration? Marcar paraRevisin
(1) Puntos
(Seleccione todas las respuestas correctas)
It offers high availability at no additional costs
Takes advantage of the database optimizer (*)
No additional servers needed to implement ETL (*)
Can scale efficiently (*)
Incorrecto Incorrect. Some of the advantages of using Oracle Data Integration areno additional servers needed to implement ETL, ODI takes advantage of the database
optimizer and ODI can scale efficiently.
50. Which of the following control structures can be defined as part of a data flow
with Oracle Data Integrator? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Loops (*)
GOTOs
7/27/2019 Presales Data Warehousing
54/78
Conditions (*)
Error handling (*)
Correcto Correct. Loops, conditions and error handling can be defined as part of a
data flow with Oracle Data Integrator.
7/27/2019 Presales Data Warehousing
55/78
1. Materialized views can be based on _____. Marcar para Revisin
(1) Puntos
Oracle tables, Oracle OLAP cubes AND Oracle PL/SQL results
Oracle PL/SQL results
Oracle tables
Oracle tables AND Oracle OLAP cubes (*)
Oracle OLAP cubes
Incorrecto Incorrect. Materialized views can be based on Oracle tables or OLAP
cubes.
2. How can you use data mining with Oracle Warehouse Builder? Marcar para
Revisin
(1) Puntos
As a standard transform operation (*)
To identify records to extract
To increase write performance
To eliminate ETL logging
7/27/2019 Presales Data Warehousing
56/78
Correcto Correct. You can use data mining with Oracle Warehouse Builder s a
standard transform operation.
3. Which features included in the Oracle Exadata Database Machine contribute toimproved availability? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
ASM (*)
Redundant switches (*)
Redundant power supplies (*)
RAC (*)
Correcto Correct. Redundant power supplies and switches, ASM and RAC allcontribute to the high availability of the Oracle Exadata Oracle Database Machine.
4. What are some of the benefits provided by ASM? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Automatic striping and mirroring (*)
Low cost option for Oracle database.
7/27/2019 Presales Data Warehousing
57/78
Performance of raw partitions (*)
Easier to manage than file systems (*)
Correcto Correct. ASM is easier to manage than file systems, provides the
performance of raw partitions, and automatically implements striping and mirroring, all
with no extra cost.
5. How can you implement near real-time data integration with Oracle Data
Integrator? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
By mining Oracle UNDO segments
By accessing Change Data Capture records from logs (*)
By connecting to publish and subscribe JMS message services (*)
By reading operating system logs
Correcto Correct. You can implement near real-time data integration with Oracle
Data Integrator by capturing Change Data Capture records from logs or by connecting
to publish and subscribe JMS message services.
6. Which of the following are part of the data quality features of Oracle Warehouse
Builder? Marcar para Revisin
(1) Puntos
7/27/2019 Presales Data Warehousing
58/78
(Seleccione todas las respuestas correctas)
Exception reporting
Data profiling (*)
Match-merge (*)
Extraction tools
Correcto Correct. Data profiling and match-merge are part of the data qualityfeatures of Oracle Warehouse Builder.
7. With Database Resource Manager, you can _____. Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Specify the amount of parallelism for a resource group. (*)
Specify the maximum number of concurrent operations for a resource group (*)
Limit access to particular data for a resource group.
Limit resource consumption for a resource group (*)
Correcto Correct. With Database Resource Manager you can specify the maximum
number of concurrent operations and the amount of parallelism for a resource group,
as well as limit the resource consumption for a resource group.
7/27/2019 Presales Data Warehousing
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8. What is the minimum recommended amount of memory per CPU core for a data
warehouse? Marcar para Revisin
(1) Puntos
16 GB
4 GB (*)
8 GB
2 GB
Correcto Correct. The minimum recommended memory per core is 4 GB.
9. Which of the following can be used transparently by applications, without having
to change the application code? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Materialized views (*)
Oracle OLAP (*)
RAC (*)
Plan stabilization (*)
7/27/2019 Presales Data Warehousing
60/78
Correcto Correct. Materialized views, Oracle OLAP, plan stabilization and RAC can all
be used transparently, without having to make changes to an application.
10. Exadata improves performance by _____. Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Increasing the size of the pipes. (*)
Increasing the amount of data required to flow through pipes.
Decreasing the size of the pipes.
Reducing the amount of data required to flow through pipes. (*)
Reducing constraint caused by data flow through pipes. (*)
Incorrecto Inorrect. Exadata gives you more pipes, bigger pipes and reduces the
amount of data flowing through those pipes to deliver increased performance.
11. Advanced Compression compresses data _____. Marcar para Revisin
(1) Puntos
On initial load (*)
On subsequent UPDATEs
On subsequent UPDATEs and INSERTs
7/27/2019 Presales Data Warehousing
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On subsequent INSERTs
Correcto Correct. Advanced Compression compresses data when it is initially loaded,
and compresses INSERTs and UPDATEs in batch.
12. Exadata uses smart scans, which are _____. Marcar para Revisin
(1) Puntos
Done by the CPU.
Done in memory.
Done in Exadata cells. (*)
Exadata doesn't use smart scans.
Correcto Correct. Exadata smart scans are done in Exadata cells.
13. True/False. Oracle Data Integrator allows you to monitor ETL sessions in real
time. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
7/27/2019 Presales Data Warehousing
62/78
Correcto Correct. Oracle Data Integrator allows you to monitor ETL sessions in real
time.
14. Oracle Data Mining can take advantage of which of the following qualities of theOracle database? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
RAC (*)
Parallelism (*)
Security (*)
Enterprise Manager (*)
Correcto Correct. Data mining can take advantage of standard Oracle features, suchas parallelism, RAC, Enterprise Manager and security.
15. Oracle Data Mining, compared to SAS, provides which of the following
advantages? Marcar para Revisin
(1) Puntos
Reduced data movement, reduced data duplication and reuse of existing security (*)
Reuse of existing security
Reduced data movement
7/27/2019 Presales Data Warehousing
63/78
Reduced data duplication
Reduced data movement, reduced data duplication
Incorrecto Incorrect. With Oracle Data Mining, you do not have to move data to a
duplicate environment, and you can automatically use the security of the Oracle
Database.
16. For data warehousing, you can use RAC in which of the following ways? Marcar
para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
To provide parallel query servers across nodes. (*)
To distribute workload across all nodes. (*)
To provide high availability for all operations. (*)
To distribute workload to some of the nodes. (*)
Correcto Correct. You can use RAC with a data warehouse to distribute workload to
all or some of the nodes in a cluster, to use parallel query services across the nodes,
and to provide standard high availability to data warehouse applications.
17. How many Exadata cells can be stored in a rack? Marcar para Revisin
(1) Puntos
7/27/2019 Presales Data Warehousing
64/78
32
24
2
16
18 (*)
Correcto Correct. You can store up to 18 Exadata cells in a rack.
18. Which of the following dimensions is included in most data warehouses? Marcar
para Revisin
(1) Puntos
Location dimension
Product dimension
Cost dimension
Time dimension (*)
Correcto Correct. Most data warehouses include a time dimension.
19. The Database Result Cache can _____. Marcar para Revisin
7/27/2019 Presales Data Warehousing
65/78
(1) Puntos
(Seleccione todas las respuestas correctas)
Cache query execution plans
Cache returns from PL/SQL functions (*)
Cache PL/SQL code
Cache results from queries (*)
Incorrecto Incorrect. The Query Result Cache caches results from queries and
returns from PL/SQL functions.
20. Which of the following control structures can be defined as part of a data flow
with Oracle Data Integrator? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
GOTOs
Loops (*)
Error handling (*)
Conditions (*)
7/27/2019 Presales Data Warehousing
66/78
Correcto Correct. Loops, conditions and error handling can be defined as part of a
data flow with Oracle Data Integrator.
26. True/False. The SQL optimizer is aware of Oracle OLAP cubes. Marcar para
Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. The SQL optimizer is aware of Oracle OLAP cubes.
27. Which of the following statements are true about Oracle OLAP? Marcar para
Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Oracle OLAP runs in the Oracle database. (*)
Oracle OLAP can be used with RAC. (*)
Oracle OLAP uses standard Oracle security. (*)
Meta data for Oracle OLAP is in a compatible data dictionary.
Correcto Correct. Oracle OLAP runs in the Oracle database and uses standard Oracle
security. Oracle OLAP can be used with RAC, but Oracle OLAP stores its meta data in
the Oracle data dictionary itself.
7/27/2019 Presales Data Warehousing
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28. Interval partitioning delivers which of the following benefits? Marcar para
Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Automatic transfer of older partitions to reduced cost storage.
Improved performance versus range partitions.
The ability to partition data based on a date. (*)
Automatic creation of new partitions, based on a length of time. (*)
Correcto Correct. Interval partitioning is based on a date, and can automatically
create new partitions based on a length of time.
29. The Oracle Warehouse Builder Repository can _____. Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Import metadata from Oracle tools (*)
Import metadata from ERWin (*)
Synchronize access for multiple users (*)
7/27/2019 Presales Data Warehousing
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Lock objects in repository (*)
Correcto Correct. The Oracle Warehouse Builder repository can import meta data
from Oracle tools and ERWin, among other tools, synchronize multi-user access tometadata and lock objects in the repository.
30. True/False. You can perform 'what-if' analysis of potential changes with Oracle
Warehouse Builder. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. You can perform 'what-if' analysis of potential changes with Oracle
Warehouse Builder.
31. How many Knowledge Modules come with Oracle Data Integrator? Marcar para
Revisin
(1) Puntos
120 (*)
200
100
25
50
7/27/2019 Presales Data Warehousing
69/78
Correcto Correct. 120 Knowledge Modules come with Oracle Data Integrator.
32. True/False. Partitions should be used to load new data into data warehouse
tables. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Incorrecto Incorrect. The EXCHANGE PARTITION command can be used to load data
into a data warehouse table.
33. Which of the following things can Oracle Data Mining do? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Reduce the amount of data used in a data warehouse
Determine associations within a population (*)
Associate factors with a business issue (*)
Predict customer behaviour (*)
7/27/2019 Presales Data Warehousing
70/78
Correcto Correct. Oracle Data Mining can be used to predict customer behaviour,
associate factors with a business issue, or determine associations within a population
to use for future marketing and sales actions.
34. True/False. Oracle Exadata Database Machine combines storage and processing.
Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. The Oracle Exadata Database Machine combines storage with
processing.
35. With Advanced Compression, you can compress _____. Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Backup data (*)
Unstructured data (*)
Structured data (*)
Network Transport (*)
Meta data
7/27/2019 Presales Data Warehousing
71/78
Incorrecto Incorrect. Advanced Compression can compress structured, unstructured
and backup data, as well as network traffic.
36. What are some of the advantages of using Oracle Data Integration? Marcar para
Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
It offers high availability at no additional costs
Can scale efficiently (*)
Takes advantage of the database optimizer (*)
No additional servers needed to implement ETL (*)
Correcto Correct. Some of the advantages of using Oracle Data Integration are no
additional servers needed to implement ETL, ODI takes advantage of the database
optimizer and ODI can scale efficiently.
37. Compression can be applied to which of the following? Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Partitions (*)
7/27/2019 Presales Data Warehousing
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Tables (*)
Indexes (*)
Views
Correcto Correct. You can apply compression to tables, indexes or partitions.
38. What is Oracle's market share in the data warehousing market? Marcar para
Revisin(1) Puntos
15%
41% (*)
10%
22%
Correcto Correct. Oracle's market share for data warehousing is 41%.
39. Which of the following is true of a data warehouse? Marcar para Revisin
(1) Puntos
Data warehouse queries are simpler than OLTP queries.
7/27/2019 Presales Data Warehousing
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The data warehouse is refreshed frequently in real time.
A data warehouse typically contains large amounts of data. (*)
Queries against a data warehouse do not include summarized information.
Incorrecto Incorrect. A data warehouse typically contains large amounts of data.
40. Exadata Storage Servers improve performance in which ways? Marcar para
Revisin(1) Puntos
(Seleccione todas las respuestas correctas)
More efficient memory usage
Moving some intelligence to smart scans in the Exadata cells (*)
Reducing the amount of I/O performed
Reducing the amount of rows returned to the server (*)
Incorrecto Incorrect. Exadata improves performance by offloading CPU funtions to
the cells and reducing the amount of data returned to the server.
41. Which of the following contributes to the improved performance of the Oracle
Exadata Database Machine? Marcar para Revisin
(1) Puntos
7/27/2019 Presales Data Warehousing
74/78
(Seleccione todas las respuestas correctas)
Proprietary high speed CPUs
InfiniBand switches (*)
Exadata Storage Server (*)
Correcto Correct. The InfiniBand switches allow for greater data flow, while the
Exadata Storage Server reduces the amount of data sent for processing.
42. True/False. Oracle Warehouse Builder allows you to graphically map data flows.
Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. Oracle Warehouse Builder allows you to graphically map data
flows.
43. Partitioning can improve performance due to which of the following reasons?
Marcar para Revisin
(1) Puntos
Partition-wise joins.
7/27/2019 Presales Data Warehousing
75/78
Partitioning doesn't improve performance.
Partition pruning by the optimizer.
Partition pruning and partition-wise joins. (*)
Correcto Correct. Both partition pruning and partition-wise joins improve the
performance of queries with partitioning.
44. For OLTP data, it is a good practice to compress _____. Marcar para Revisin(1) Puntos
Some of your B*-tree indexes
Some of your bit-mapped indexes
Your largest tables
All data and indexes
Your largest tables AND some of your B*-tree indexes (*)
Correcto Correct. It makes sense to compress your largest tables and some of your
B*-tree indexes for an OLTP database.
45. Which of the following factors contribute to the performance of Oracle OLAP?
Marcar para Revisin
(1) Puntos
7/27/2019 Presales Data Warehousing
76/78
(Seleccione todas las respuestas correctas)
More efficent CPU operations
Offset addressing (*)
Dense arrays (*)
Incorrecto Incorrect. Both offset addressing (which allows fast access), and dense
arrays (which reduces I/O) deliver optimal performance for Oracle OLAP.
46. True/False. Adaptive parallelism is ON by default. Marcar para Revisin
(1) Puntos
Verdadero (*)
Falso
Correcto Correct. Adaptive parallelism is on by default, based on the
PARALLEL_ADPATIVE_MULTI_USER parameter, which is TRUE by default.
47. Which of the following index types is particularly useful for data warehousing?
Marcar para Revisin
(1) Puntos
Invisible indexes
B*-tree indexes
7/27/2019 Presales Data Warehousing
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Reverse indexes
Bitmap indexes (*)
Correcto Correct, bitmap indexes are particularly useful for data warehouses.
48. Which of the following statements about a data warehouse is NOT true? Marcar
para Revisin
(1) Puntos
A data warehouse is used for trend analysis.
A data warehouse consolidates data from multiple sources.
A data warehouse is primarily read only.
A data warehouse is used for tactical purposes. (*)
Correcto Correct. A data warehouse is primarily used for strategic purposes.
49. SecureFiles allows _____. Marcar para Revisin
(1) Puntos
(Seleccione todas las respuestas correctas)
Bit level security
7/27/2019 Presales Data Warehousing
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Multiple levels of compression (*)
Partition-specified compression (*)
Random writes to SecureFiles (*)
Incorrecto Incorrect. SecureFiles allows random writes to SecureFiles, multiple
levels of compression and the ability to specify compression at the partition level.
50. Which is the fastest way to load data into an Oracle data warehouse? Marcar
para Revisin
(1) Puntos
SQL*Loader
Direct Path loading
External table using CREATE TABLE AS . . . SELECT (*)
Data Pump
Incorrecto Incorrect. Using an external table and CTAS is the fastest way to load
data.
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