plsql _final2

Test: Final Exam Semester 2

Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer.

Final Exam Semester 2

1. We want to store a complete copy of the DEPARTMENTS table (all the rows and all the columns) in a single PL/SQL variable. Which of the following kinds of variable could we use? Mark for Review (1) Points

An INDEX BY table

A record

An INDEX BY table of records (*)

A CLOB

An explicit cursor

Correct

2. Which of the following successfully declares an INDEX BY table named DEPT_NAMES_TAB, which could be used to store all the department names from the DEPARTMENTS table? Mark for Review (1) Points

DECLARE TYPE t_dnames IS TABLE OF departments.department_name%TYPE INDEX BY INTEGER; dept_names_tab t_dnames;

DECLARE TYPE t_dnames IS TABLE OF departments.department_name%TYPE INDEX BY BINARY_INTEGER; dept_names_tab t_dnames;

(*)

DECLARE TYPE t_dnames IS TABLE OF departments.department_name%TYPE INDEX BY PLS_INTEGER; dept_names_tab t_dnames%TYPE;

DECLARE TYPE t_dnames IS TABLE OF department_name INDEX BY BINARY_INTEGER; dept_names_tab t_dnames;

Correct

3. An INDEX BY table of records can store a maximum of 255 records. True or False? Mark for Review (1) Points

True

False (*)

Correct

4. You have created several directory objects in the database, as pointers to operating system directories which contain BFILEs. Which data dictionary view would you query to see these directories? Mark for Review (1) Points

USER_DIRECTORIES

USER_BFILES

ALL_DIRECTORIES (*)

USER_EXTERNAL_FILES

ALL_BFILES

Correct

5. The database administrator has created a directory as follows: CREATE DIRECTORY filesdir AS 'C:\BFILEDIR';

How would the DBA allow all database users to query the BFILEs in this directory? Mark for Review (1) Points

GRANT READ ON filesdir TO PUBLIC;

GRANT READ ON DIRECTORY filesdir TO PUBLIC; (*)

GRANT SELECT ON filesdir TO PUBLIC;

GRANT QUERY ON DIRECTORY filesdir TO PUBLIC;

GRANT READ ON 'C:\BFILEDIR' TO PUBLIC;

Correct

of 4Test: Final Exam Semester 2



6. The BIGEMP table contains a RESUME column of datatype BFILE, which has been populated with locator values. The following code reads a BFILE locator value into a variable, then checks whether the BFILE itself exists in the operating system directory. If the file is present, the code opens the file and reads its contents. What should be coded at Point A?

DECLARE v_locator BFILE;BEGIN SELECT resume INTO v_locator FROM bigemp WHERE employee_id = 100; -- Point A DBMS_LOB.FILEOPEN(v_locator); DBMS_LOB.READ(v_locator, ....); .... DBMS_LOB.FILECLOSE(v_locator); END IF; END; Mark for Review (1) Points

IF BFILENAME(v_locator) EXISTS THEN

IF DBMS_LOB.FILEEXISTS(v_locator) = 1 THEN (*)

IF DBMS_LOB.FILEEXISTS(v_locator) THEN

IF DBMS_LOB.FILEEXISTS THEN

IF BFILEEXISTS(v_locator) THEN

Correct

7. Which of the following best describes the difference between BLOB and BFILE data? Mark for Review (1) Points

A BLOB can contain text data while a BFILE cannot.

BLOB data is stored inside the database, while BFILE data is outside the database in separate operating system files. (*)

The maximum size of a BLOB is 2GB; a BFILE can be up to 128TB if needed.

A table can contain several BLOB columns but only one BFILE column.

There is no difference between a BLOB and a BFILE.

Correct

8. BLOB, JPEG, BFILE and MP3 are all LOB column datatypes. True or False? Mark for Review (1) Points

True

False (*)

Incorrect. Refer to Section 11.

9. CLOB and BLOB are internal LOB datatypes, while BFILE is an external LOB datatype. True or False? Mark for Review (1) Points

True (*)

False

Correct

10. A LONG column can be converted to CLOB using a single ALTER TABLE command. True or False? Mark for Review (1) Points

True (*)

False

Correct

Page 2 of 4Test: Final Exam Semester 2



11. You need to add a new column to the EMPLOYEES table. This column will store each employee's favourite movie. A movie can be up to 4GB in size and the movies will be stored inside the database for better security. Which datatype must you use for this column? Mark for Review (1) Points

CLOB

BLOB (*)

LONG RAW

BFILE

LONG

Correct

12. A procedure includes the following code:

CURSOR loc_curs IS SELECT location_id, city, country_id FROM locations;

Which of the following changes to the LOCATIONS table will allow the procedure to be recompiled successfully without editing its code? (Choose two.) Mark for Review (1) Points

(Choose all correct answers)

RENAME locations TO new_locations;

ALTER TABLE locations ADD (climate VARCHAR2(30)); (*)

ALTER TABLE locations DROP COLUMN city;

ALTER TABLE locations DROP COLUMN postal_code; (*)

Correct

13. Examine the following code:

CREATE VIEW ed_view AS SELECT * FROM employees NATURAL JOIN departments; CREATE PROCEDURE ed_proc IS CURSOR ed_curs IS SELECT * FROM ed_view;

Which of the following statements about dependencies are true? (Choose two.) Mark for Review (1) Points


ED_PROC is indirectly dependent on DEPARTMENTS (*)

EMPLOYEES is referenced by ED_VIEW (*)

ED_CURS is directly dependent on ED_VIEW

ED_PROC is referenced by ED_VIEW

ED_PROC is directly dependent on EMPLOYEES


14. User BOB wants to know which objects reference his DEPARTMENTS table. Which of the following must he execute to populate the DEPTREE_TEMPTAB table? Mark for Review (1) Points

BEGIN utldtree('DEPARTMENTS'); END;

BEGIN deptree_fill('TABLE','BOB','DEPARTMENTS'); END;

(*)

BEGIN deptree_fill('TABLE','DEPARTMENTS'); END;

BEGIN ideptree('TABLE','BOB','DEPARTMENTS'); END;

Correct

15. Which of the following is NOT created when the utldtree.sql script is run? Mark for Review (1) Points

The DEPTREE view

The DEPTREE_FILL procedure

The USER_DEPENDENCIES view (*)

The DEPTREE_TEMPTAB table

Correct




16. Examine the following code:

CREATE FUNCTION deptfunc RETURN NUMBER IS v_count NUMBER(6); BEGIN SELECT COUNT(*) INTO v_count FROM departments; RETURN v_count; END;

Which of the following will display the dependency between DEPTFUNC and DEPARTMENTS? Mark for Review (1) Points

SELECT name, type FROM user_dependencies WHERE name IN ('DEPTFUNC','DEPARTMENTS');

SELECT name, type, referenced_name, referenced_type FROM user_dependencies WHERE referenced_name = 'DEPARTMENTS' AND referenced_type = 'TABLE';

(*)

SELECT name, type, referenced_name, referenced_type FROM user_dependencies WHERE name = 'DEPARTMENTS' AND type = 'TABLE';

SELECT object_name, object_type FROM user_objects WHERE object_name IN ('DEPARTMENTS','DEPTFUNC') AND referenced = 'YES';


17. A single procedure can be both a referenced object and a dependent object. True or False? Mark for Review (1) Points

True (*)

False


18. When a table is dropped, all PL/SQL subprograms that reference the table are automatically dropped. True or False? Mark for Review (1) Points

True

False (*)

Correct

19. Which of the following will declare a composite PL/SQL data type named COMPO_TYPE, containing two fields named FIELD1 and FIELD2? Mark for Review (1) Points

DECLARE compo_type (field1 NUMBER, field2 VARCHAR2(30));

DECLARE TYPE compo_type IS (field1 NUMBER, field2 VARCHAR2(30));

DECLARE TYPE compo_type IS RECORD (field1 NUMBER, field2 VARCHAR2(30));

(*)

DECLARE compo_type IS RECORD (field1 NUMBER, field2 VARCHAR2(30));

Correct

20. A PL/SQL package named MYPACK declares a record type named MYTYPE as a public variable in the package specification. Which of the following anonymous blocks successfully declares a local variable of datatype MYTYPE? Mark for Review (1) Points

DECLARE v_myrec IS RECORD mypack.mytype; BEGIN ...

DECLARE

v_myrec mypack.mytype; BEGIN ...

(*)

DECLARE v_myrec mytype; BEGIN ...

DECLARE v_myrec IS RECORD (mypack.mytype); BEGIN ...

Correct



Final Exam Semester 2 1. The following code declares an INDEX BY table and populates it with employees' salaries, using the employee_id as the BINARY_INTEGER index of the table: DECLARE TYPE t_emp_sals IS TABLE OF employees.salary%TYPE INDEX BY BINARY_INTEGER; emp_sals_tab t_emp_sals; BEGIN FOR v_emprec IN (SELECT employee_id, salary FROM employees) LOOP -- Line A END LOOP; END;

What must be coded at Line A? Mark for Review (1) Points emp_sals_tab(employee_id) := v_emprec.salary; t_emp_sals(v_emprec.employee_id) := v_emprec.salary; emp_sals_tab(v_emprec.employee_id) := v_emprec.salary; (*) emp_sals_tab(i) := v_emprec.salary; Incorrect. Refer to Section 11.

2. Which of the following successfully declares an INDEX BY table named DEPT_NAMES_TAB, which could be used to store all the department names from the DEPARTMENTS table? Mark for Review (1) Points DECLARE TYPE t_dnames IS TABLE OF departments.department_name%TYPE INDEX BY INTEGER; dept_names_tab t_dnames; DECLARE TYPE t_dnames IS TABLE OF departments.department_name%TYPE INDEX BY BINARY_INTEGER; dept_names_tab t_dnames; (*) DECLARE TYPE t_dnames IS TABLE OF departments.department_name%TYPE INDEX BY PLS_INTEGER; dept_names_tab t_dnames%TYPE; DECLARE TYPE t_dnames IS TABLE OF department_name INDEX BY BINARY_INTEGER; dept_names_tab t_dnames; Correct 3. Which of the following PL/SQL data structures can store a collection? (Choose two.) Mark for Review (1) Points (Choose all correct answers) An INDEX BY table (*) A record %ROWTYPE An INDEX BY table of records (*) A BLOB Incorrect. Refer to Section 11. 4. BFILEs are stored outside the database and can be queried and updated by using procedures in DBMS_LOB. True or False? Mark for Review (1) Points

True False (*) Incorrect. Refer to Section 11. 5. The BIGEMP table contains a RESUME column of datatype BFILE, which has been populated with locator values. The following code reads a BFILE locator value into a variable, then checks whether the BFILE itself exists in the operating system directory. If the file is present, the code opens the file and reads its contents. What should be coded at Point A? DECLARE v_locator BFILE;BEGIN SELECT resume INTO v_locator FROM bigemp WHERE employee_id = 100; -- Point A DBMS_LOB.FILEOPEN(v_locator); DBMS_LOB.READ(v_locator, ....); .... DBMS_LOB.FILECLOSE(v_locator); END IF; END;

Mark for Review (1) Points IF BFILENAME(v_locator) EXISTS THEN IF DBMS_LOB.FILEEXISTS(v_locator) = 1 THEN (*) IF DBMS_LOB.FILEEXISTS(v_locator) THEN IF DBMS_LOB.FILEEXISTS THEN IF BFILEEXISTS(v_locator) THEN Incorrect. Refer to Section 11.

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Final Exam Semester 2 6. You have created several directory objects in the database, as pointers to operating system directories which contain BFILEs. Which data dictionary view would you query to see these directories? Mark for Review (1) Points USER_DIRECTORIES

USER_BFILES ALL_DIRECTORIES (*) USER_EXTERNAL_FILES ALL_BFILES Incorrect. Refer to Section 11. 7. When a table is dropped, all PL/SQL subprograms that reference the table are automatically dropped. True or False? Mark for Review (1) Points True False (*) Correct 8. Which of the following is NOT created when the utldtree.sql script is run? Mark for Review (1) Points The DEPTREE view The DEPTREE_FILL procedure The USER_DEPENDENCIES view (*) The DEPTREE_TEMPTAB table Incorrect. Refer to Section 12. 9. Which of the following techniques will make it more likely that an invalidated PL/SQL subprogram will recompile successfully? (Choose two.) Mark for Review (1) Points (Choose all correct answers) Declaring record structures using %ROWTYPE (*) Using a cursor FOR loop instead of opening and closing the cursor explicitly SELECTing a list of column-names instead of using SELECT * Including a column list with INSERT statements (*) Incorrect. Refer to Section 12.

10. User BOB wants to know which objects reference his DEPARTMENTS table. Which of the following must he execute to populate the DEPTREE_TEMPTAB table? Mark for Review (1) Points BEGIN utldtree('DEPARTMENTS'); END; BEGIN deptree_fill('TABLE','BOB','DEPARTMENTS'); END;(*) BEGIN deptree_fill('TABLE','DEPARTMENTS'); END; BEGIN ideptree('TABLE','BOB','DEPARTMENTS'); END; Correct

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Final Exam Semester 2 11. A single procedure can be both a referenced object and a dependent object. True or False? Mark for Review (1) Points True (*) False Correct

12. The PL/SQL variable V_LAST_NAME is used to store fetched values of the LAST_NAME column of the EMPLOYEES table. To minimize dependency failures, the variable should be declared as:v_last_name VARCHAR2(25);

True or False? Mark for Review (1) Points True False (*) Correct 13. Which of the following will display dependency information which has been generated by executing the DEPTREE_FILL procedure? (Choose two.) Mark for Review (1) Points (Choose all correct answers) The USER_DEPENDENCIES view The DEPTREE view (*) The UTLDTREE script The DISPLAY_DEPTREE view The IDEPTREE view (*) Incorrect. Refer to Section 12. 14. Which of the following best describes the difference between BLOB and BFILE data? Mark for Review (1) Points A BLOB can contain text data while a BFILE cannot. BLOB data is stored inside the database, while BFILE data is outside the database in separate operating system files. (*) The maximum size of a BLOB is 2GB; a BFILE can be up to 128TB if needed. A table can contain several BLOB columns but only one BFILE column. There is no difference between a BLOB and a BFILE. Incorrect. Refer to Section 11. 15. Table NEWEMP contains a PHOTO_ID column of datatype LONG RAW. Which of the following will convert this column to a suitable new LOB datatype? Mark for Review

(1) Points ALTER TABLE newemp COLUMN (photo_id BLOB); ALTER TABLE newemp MODIFY (photo_id BFILE); ALTER TABLE newemp MODIFY (photo_id BLOB); (*) ALTER TABLE newemp DROP COLUMN (photo_id); ALTER TABLE newemp ADD (photo_id BLOB); ALTER TABLE newemp COLUMN (photo_id LONG RAW); Incorrect. Refer to Section 11.

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Final Exam Semester 2 16. A LONG column can be converted to CLOB using a single ALTER TABLE command. True or False? Mark for Review (1) Points True (*) False Correct 17. CLOB and BLOB are internal LOB datatypes, while BFILE is an external LOB datatype. True or False? Mark for Review (1) Points True (*) False

Incorrect. Refer to Section 11. 18. You need to store very large amounts of text data in a table column inside the database. Which datatype should you use for this column? Mark for Review (1) Points CLOB (*) BLOB LONG VARCHAR2(4000) None of the above Incorrect. Refer to Section 11. 19. A PL/SQL package named MYPACK declares a record type named MYTYPE as a public variable in the package specification. Which of the following anonymous blocks successfully declares a local variable of datatype MYTYPE? Mark for Review (1) Points DECLARE v_myrec IS RECORD mypack.mytype; BEGIN ... DECLARE v_myrec mypack.mytype; BEGIN ... (*) DECLARE v_myrec mytype; BEGIN ... DECLARE v_myrec IS RECORD (mypack.mytype); BEGIN ... Incorrect. Refer to Section 11. 20. Which of the following will declare a composite PL/SQL data type named COMPO_TYPE, containing two fields named FIELD1 and FIELD2? Mark for Review (1) Points DECLARE compo_type (field1 NUMBER,

field2 VARCHAR2(30)); DECLARE TYPE compo_type IS (field1 NUMBER, field2 VARCHAR2(30)); DECLARE TYPE compo_type IS RECORD (field1 NUMBER, field2 VARCHAR2(30)); (*) DECLARE compo_type IS RECORD (field1 NUMBER, field2 VARCHAR2(30)); Correct

Page 4 of 4

Test: Final Exam Semester 2Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer.


1. The database administrator has created a directory as follows:CREATE DIRECTORY filesdir AS 'C:\BFILEDIR';

How would the DBA allow all database users to query the BFILEs in this directory?

Mark for Review (1) Points

GRANT READ ON filesdir TO PUBLIC;

GRANT READ ON DIRECTORY filesdir TO PUBLIC; (*)

GRANT SELECT ON filesdir TO PUBLIC;

GRANT QUERY ON DIRECTORY filesdir TO PUBLIC;

GRANT READ ON 'C:\BFILEDIR' TO PUBLIC;

Correct Correct

2. You have created several directory objects in the database, as pointers to operating system directories which contain BFILEs. Which data dictionary view would you query to see these directories? Mark for Review (1) Points

USER_DIRECTORIES

USER_BFILES

ALL_DIRECTORIES (*)

USER_EXTERNAL_FILES

ALL_BFILES

Correct Correct

3. The BIGEMP table contains a RESUME column of datatype BFILE, which has been populated with locator values. The following code reads a BFILE locator value into a variable, then checks whether the BFILE itself exists in the operating system directory. If the file is present, the code opens the file and reads its contents. What should be coded at Point A?

DECLARE v_locator BFILE;BEGIN SELECT resume INTO v_locator FROM bigemp WHERE employee_id = 100; -- Point A DBMS_LOB.FILEOPEN(v_locator); DBMS_LOB.READ(v_locator, ....); .... DBMS_LOB.FILECLOSE(v_locator); END IF;END;


IF BFILENAME(v_locator) EXISTS THEN

IF DBMS_LOB.FILEEXISTS(v_locator) = 1 THEN (*)

IF DBMS_LOB.FILEEXISTS(v_locator) THEN

IF DBMS_LOB.FILEEXISTS THEN

IF BFILEEXISTS(v_locator) THEN

Incorrect Incorrect. Refer to Section 11.

4. We want to store a complete copy of the DEPARTMENTS table (all the rows and all the columns) in a single PL/SQL variable. Which of the following kinds of variable could we use? Mark for Review (1) Points

An INDEX BY table

A record


A CLOB

An explicit cursor

Correct Correct

5. Which of the following PL/SQL data structures can store a collection? (Choose two.) Mark for Review (1) Points


An INDEX BY table (*)

A record

%ROWTYPE


A BLOB

Correct Correct 6. An INDEX BY table of records can store a maximum of 255 records. True or False? Mark for Review

(1) Points

True

False (*)


7. You need to add a new column to the EMPLOYEES table. This column will store each employee's favourite movie. A movie can be up to 4GB in size and the movies will be stored inside the database for better security. Which datatype must you use for this column? Mark for Review (1) Points

CLOB

BLOB (*)

LONG RAW

BFILE

LONG

Correct Correct

8. The JOB_APPLICANTS table contains two columns:(applicant_id NUMBER PRIMARY KEY,resume CLOB)

For applicant_id 100, we want to modify the value of the RESUME column value from "I worked for Oracle" to "I worked for Oracle for five years".

Which of the following will do this successfully? (Choose two.)Mark for Review

(1) Points


UPDATE job_applicantsSET SUBSTR(resume, 21,14) = 'for five years'WHERE candidate_id = 100;

UPDATE job_applicants

SET resume = 'I worked for Oracle for five years'WHERE candidate_id = 100;

(*)

DECLARE v_locator CLOB;BEGIN v_locator := 'I worked for Oracle for five years'; UPDATE job_applicants SET resume = DBMS_LOB.WRITE(v_locator) WHERE candidate_id = 100;END;

DECLARE v_lobloc CLOB;BEGIN SELECT resume INTO v_lobloc FROM job_applicants WHERE applicant_id = 100; DBMS_LOB.WRITE(v_lobloc,14,21,'for five years');END;

(*)


9. Which of the following best describes the difference between BLOB and BFILE data? Mark for Review (1) Points

A BLOB can contain text data while a BFILE cannot.

BLOB data is stored inside the database, while BFILE data is outside the database in separate operating system files. (*)

The maximum size of a BLOB is 2GB; a BFILE can be up to 128TB if needed.

A table can contain several BLOB columns but only one BFILE column.

There is no difference between a BLOB and a BFILE.

Correct Correct

10. Which of the following methods can be used to query CLOB data values? (Choose two.) Mark for Review (1) Points


SELECT (*)

DBMS_LOB.PUT

DBMS_LOB.GETLENGTH

DBMS_LOB.READ (*)

Correct Correct 11. CLOB and BLOB are internal LOB datatypes, while BFILE is an external LOB datatype. True or False? Mark for Review (1) Points

True (*)

False

Correct Correct

12. A procedure includes the following code:

CURSOR loc_curs IS SELECT location_id, city, country_id FROM locations;

Which of the following changes to the LOCATIONS table will allow the procedure to be recompiled successfully without editing its code? (Choose two.)



RENAME locations TO new_locations;

ALTER TABLE locations ADD (climate VARCHAR2(30)); (*)

ALTER TABLE locations DROP COLUMN city;

ALTER TABLE locations DROP COLUMN postal_code; (*)


13. Package EMPPACK contains a public procedure GET_EMP, which contains a reference to the EMPLOYEES table. Procedure CALL_EMP invokes EMPPACK.GET_EMP. The following SQL statement is executed:

ALTER TABLE employees ADD (gender CHAR(1));

Which one of the following statements is true?Mark for Review

(1) Points

The specification and body of EMPPACK are invalidated, but CALL_EMP remains valid.

The body of EMPPACK is invalidated, but the specification remains valid. (*)

EMPPACK.GET_EMP is invalidated, but other procedures in EMPPACK remain valid.

Nothing is invalidated because the PL/SQL code does not reference the GENDER column.


14. Which of the following will display dependency information which has been generated by executing the DEPTREE_FILL procedure? (Choose two.) Mark for Review (1) Points


The USER_DEPENDENCIES view

The DEPTREE view (*)

The UTLDTREE script

The DISPLAY_DEPTREE view

The IDEPTREE view (*)


15. Which of the following will display the number of invalid package bodies in your schema? Mark for Review

(1) Points

SELECT COUNT(*) FROM user_objectsWHERE object_type = 'PACKAGE BODY'AND status = 'INVALID';

(*)

SELECT COUNT(*) FROM user_dependenciesWHERE type = 'PACKAGE BODY'AND status = 'INVALID';

SELECT COUNT(*) FROM user_packagesWHERE status = 'INVALID';

SELECT COUNT(*) FROM user_objectsWHERE object_type LIKE 'PACKAGE%'AND status = 'INVALID';

Incorrect Incorrect. Refer to Section 12. 16. When a table is dropped, all PL/SQL subprograms that reference the table are automatically dropped. True or False? Mark for Review (1) Points

True

False (*)

Correct Correct

17. A single procedure can be both a referenced object and a dependent object. True or False? Mark for Review (1) Points

True (*)

False

Correct Correct

18. The PL/SQL variable V_LAST_NAME is used to store fetched values of the LAST_NAME column of the EMPLOYEES table. To minimize dependency failures, the variable should be declared as:

v_last_name VARCHAR2(25);

True or False?Mark for Review

(1) Points

True

False (*)


19. Which of the following will declare a composite PL/SQL data type named COMPO_TYPE, containing two fields named FIELD1 and FIELD2? Mark for Review (1) Points

DECLARE compo_type (field1 NUMBER, field2 VARCHAR2(30));

DECLARE TYPE compo_type IS (field1 NUMBER, field2 VARCHAR2(30));

DECLARE TYPE compo_type IS RECORD (field1 NUMBER, field2 VARCHAR2(30));

(*)

DECLARE compo_type IS RECORD (field1 NUMBER, field2 VARCHAR2(30));

Correct Correct

20. A PL/SQL package named MYPACK declares a record type named MYTYPE as a public variable in the package specification. Which of the following anonymous blocks successfully declares a local variable of datatype MYTYPE? Mark for Review (1) Points

DECLARE v_myrec IS RECORD mypack.mytype;BEGIN ...

DECLARE v_myrec mypack.mytype;BEGIN ...

(*)

DECLARE v_myrec mytype;BEGIN ...

DECLARE v_myrec IS RECORD (mypack.mytype);BEGIN ...




Final Exam Semester 2 1. Which of the following statements about BFILEs are NOT true? (Choose two.) Mark for Review (1) Points (Choose all correct answers) They are stored outside the database. We can read BFILE data using the DBMS_LOB package. We can grant SELECT object privilege on them. (*)

We can read BFILE data in a SELECT statement. (*) The database contains a locator which points to the external BFILE. Correct 2. The BIGEMP table contains a RESUME column of datatype BFILE, which has been populated with locator values. The following code reads a BFILE locator value into a variable, then checks whether the BFILE itself exists in the operating system directory. If the file is present, the code opens the file and reads its contents. What should be coded at Point A? DECLARE v_locator BFILE;BEGIN SELECT resume INTO v_locator FROM bigemp WHERE employee_id = 100; -- Point A DBMS_LOB.FILEOPEN(v_locator); DBMS_LOB.READ(v_locator, ....); .... DBMS_LOB.FILECLOSE(v_locator); END IF; END;

Mark for Review (1) Points IF BFILENAME(v_locator) EXISTS THEN IF DBMS_LOB.FILEEXISTS(v_locator) = 1 THEN (*) IF DBMS_LOB.FILEEXISTS(v_locator) THEN IF DBMS_LOB.FILEEXISTS THEN IF BFILEEXISTS(v_locator) THEN Correct 3. BFILEs are stored outside the database and can be queried and updated by using procedures in DBMS_LOB. True or False? Mark for Review (1) Points True False (*) Correct 4. Package ED_PACK has declared a record type named ED_TYPE in the package specification. Which of the following anonymous blocks successfully declares a variable whose datatype is ED_TYPE? Mark for Review (1) Points DECLARE

v_ed_rec IS RECORD ed_pack.ed_type; BEGIN ... DECLARE v_ed_rec ed_pack.ed_type; BEGIN ... (*) DECLARE v_ed_rec ed_pack.ed_type%ROWTYPE; BEGIN... DECLARE v_ed_rec ed_pack.ed_type%TYPE; BEGIN ... None of the above. Variables of datatype ED_TYPE can be declared only within ED_PACK, not in separate subprograms or anonymous blocks. Incorrect. Refer to Section 11. 5. A PL/SQL package named MYPACK declares a record type named MYTYPE as a public variable in the package specification. Which of the following anonymous blocks successfully declares a local variable of datatype MYTYPE? Mark for Review (1) Points DECLARE v_myrec IS RECORD mypack.mytype; BEGIN ... DECLARE v_myrec mypack.mytype; BEGIN ... (*) DECLARE v_myrec mytype; BEGIN ... DECLARE v_myrec IS RECORD (mypack.mytype); BEGIN ... Correct

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Final Exam Semester 2 6. Function FETCH_EMP references the EMPLOYEES table. The table is modified by: ALTER TABLE employees ADD (resume CLOB); When will the ORACLE server try to recompile FETCH_EMP automatically? Mark for Review (1) Points When the command ALTER FUNCTION fetch_emp COMPILE; is executed The next time a user session invokes FETCH_EMP (*) When the RESUME column is dropped from the EMPLOYEES table When FETCH_EMP is dropped and recreated Incorrect. Refer to Section 12. 7. Which of the following techniques will make it more likely that an invalidated PL/SQL subprogram will recompile successfully? (Choose two.) Mark for Review (1) Points (Choose all correct answers) Declaring record structures using %ROWTYPE (*) Using a cursor FOR loop instead of opening and closing the cursor explicitly SELECTing a list of column-names instead of using SELECT * Including a column list with INSERT statements (*) Correct 8. Which of the following will display dependency information which has been generated by executing the DEPTREE_FILL procedure? (Choose two.) Mark for Review (1) Points (Choose all correct answers)

The USER_DEPENDENCIES view The DEPTREE view (*) The UTLDTREE script The DISPLAY_DEPTREE view The IDEPTREE view (*) Correct 9. Package EMPPACK contains a public procedure GET_EMP, which contains a reference to the EMPLOYEES table. Procedure CALL_EMP invokes EMPPACK.GET_EMP. The following SQL statement is executed: ALTER TABLE employees ADD (gender CHAR(1));

Which one of the following statements is true? Mark for Review (1) Points The specification and body of EMPPACK are invalidated, but CALL_EMP remains valid. The body of EMPPACK is invalidated, but the specification remains valid. (*) EMPPACK.GET_EMP is invalidated, but other procedures in EMPPACK remain valid. Nothing is invalidated because the PL/SQL code does not reference the GENDER column. Incorrect. Refer to Section 12. 10. A procedure includes the following code: CURSOR loc_curs IS SELECT location_id, city, country_id FROM locations;

Which of the following changes to the LOCATIONS table will allow the procedure to be recompiled successfully without editing its code? (Choose two.) Mark for Review (1) Points (Choose all correct answers) RENAME locations TO new_locations; ALTER TABLE locations ADD (climate VARCHAR2(30)); (*) ALTER TABLE locations DROP COLUMN city; ALTER TABLE locations DROP COLUMN postal_code; (*) Correct

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Final Exam Semester 2 11. Which of the following is NOT created when the utldtree.sql script is run? Mark for Review (1) Points The DEPTREE view The DEPTREE_FILL procedure The USER_DEPENDENCIES view (*) The DEPTREE_TEMPTAB table Correct 12. Examine the following code: CREATE VIEW ed_view AS SELECT * FROM employees NATURAL JOIN departments; CREATE PROCEDURE ed_proc IS CURSOR ed_curs IS SELECT * FROM ed_view;

Which of the following statements about dependencies are true? (Choose two.) Mark for Review (1) Points (Choose all correct answers) ED_PROC is indirectly dependent on DEPARTMENTS (*) EMPLOYEES is referenced by ED_VIEW (*) ED_CURS is directly dependent on ED_VIEW ED_PROC is referenced by ED_VIEW ED_PROC is directly dependent on EMPLOYEES Correct

13. Which of the following methods can be used to query CLOB data values? (Choose two.) Mark for Review (1) Points (Choose all correct answers) SELECT (*) DBMS_LOB.PUT DBMS_LOB.GETLENGTH DBMS_LOB.READ (*) Correct 14. CLOB and BLOB are internal LOB datatypes, while BFILE is an external LOB datatype. True or False? Mark for Review (1) Points True (*) False Correct 15. A LONG column can be converted to CLOB using a single ALTER TABLE command. True or False? Mark for Review (1) Points True (*) False Correct

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Final Exam Semester 2 16. BLOB, JPEG, BFILE and MP3 are all LOB column datatypes. True or False? Mark for Review

(1) Points True False (*) Correct 17. You need to add a new column to the EMPLOYEES table. This column will store each employee's favourite movie. A movie can be up to 4GB in size and the movies will be stored inside the database for better security. Which datatype must you use for this column? Mark for Review (1) Points CLOB BLOB (*) LONG RAW BFILE LONG Correct 18. We want to store a complete copy of the DEPARTMENTS table (all the rows and all the columns) in a single PL/SQL variable. Which of the following kinds of variable could we use? Mark for Review (1) Points An INDEX BY table A record An INDEX BY table of records (*) A CLOB An explicit cursor Correct 19. The following code declares an INDEX BY table and populates it with employees' salaries, using the employee_id as the BINARY_INTEGER index of the table: DECLARE TYPE t_emp_sals IS TABLE OF employees.salary%TYPE INDEX BY BINARY_INTEGER; emp_sals_tab t_emp_sals; BEGIN FOR v_emprec IN (SELECT employee_id, salary FROM employees) LOOP -- Line A END LOOP;

END;

What must be coded at Line A? Mark for Review (1) Points emp_sals_tab(employee_id) := v_emprec.salary; t_emp_sals(v_emprec.employee_id) := v_emprec.salary; emp_sals_tab(v_emprec.employee_id) := v_emprec.salary; (*) emp_sals_tab(i) := v_emprec.salary; Correct 20. An INDEX BY table of records can store a maximum of 255 records. True or False? Mark for Review (1) Points True False (*) Correct

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