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Oracle9i program with pl/sql Sample Questions:

1. Examine this code:
CREATE OR REPLACE PROCEDURE audit_action (p_who VARCHAR2) AS BEGIN INSERT INTO audit(schema_user) VALUES(p_who); END audit_action; /
CREATE OR REPLACE TRIGGER watch_it AFTER LOGON ON DATABASE CALL audit_action(ora_login_user) / What does this trigger do?

A) The trigger invoked the procedure audit_action each time a user logs on to his/her schema and adds the username to the audit table.
B) The trigger marks the user as logged on to the database before an audit statement is issued.
C) The trigger records an audit trail when a user makes changes to the database.
D) The trigger invokes the procedure audit_action each time a user logs on to the database and adds the username to the audit table.

2. Examine this code:
CREATE OR REPLACE PACKAGE metric_converter
IS
c_height CONSTRAINT NUMBER := 2.54;
c_weight CONSTRAINT NUMBER := .454;
FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER;
FUNCTION calc_weight (p_weight_in_pounds NUMBER)
RETURN NUMBER;
END;
/
CREATE OR REPLACE PACKAGE BODY metric_converter
IS
FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_height_in_inches * c_height;
END calc_height;
FUNCTION calc_weight (p_weight_in_pounds NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_weight_in_pounds * c_weight
END calc_weight
END metric_converter;
/
CREATE OR REPLACE FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_height_in_inches * metric_converter.c_height;
END calc_height;
/
Which statement is true?

A) If you remove the stand alone stored function CALC_HEIGHT, then the METRIC_CONVERTER package body and the package specification are removed.
B) The stand alone function CALC_HEIGHT cannot be created because its name is used in a packaged function.
C) If you remove the package specification, then the package body is removed.
D) If you remove the package body, then the package specification and the stand alone stored function CALC_HEIGHT are removed.
E) If you remove the package body, then the package specification is removed.
F) If you remove the package specification, then the package body and the stand alone stored function CALC_HEIGHT are removed.

3. Procedure PROCESS_EMP references the table EMP.
Procedure UPDATE_EMP updates rows if table EMP through procedure PROCESS_EMP.
There is a remote procedure QUERY_EMP that queries the EMP table through the local
procedure PROCESS_EMP.
The dependency mode is set to TIMESTAMP in this session.
Which two statements are true? (Choose two)

A) If internal logic of procedure PROCESS_EMP is modified and successfully recompiles, QUERY_EMP gets invalidated and will recompile when invoked for the second time.
B) If internal logic of procedure PROCESS_EMP is modified and successfully recompiles, UPDATE_EMP gets invalidated and will recompile when invoked for the first time.
C) If the signature of procedure PROCESS_EMP is modified and successfully recompiles, the EMP table is invalidated.
D) If the signature of procedure PROCESS_EMP is modified and successfully recompiles, UPDATE_EMP gets invalidated and will recompile when invoked for the first time.
E) If internal logic of procedure PROCESS_EMP is modified and successfully recompiles, QUERY_EMP gets invalidated and will recompile when invoked for the first time.

4. When creating a function in SQL *Plus, you receive this message:
"Warning: Function created with compilation errors."
Which command can you issue to see the actual error message?

A) SHOW FUNCTION_ERROR
B) SHOW ALL_ERRORS
C) SHOW USER_ERRORS
D) SHOW ERRORS

5. When using a packaged function in a query, what is true?

A) The packaged function can execute an INSERT, UPDATEM or DELETE statement against the table that is being queried if the pragma RESTRICT REFERENCE is used.
B) The packaged function cannot execute an INSERT, UPDATE, or DELETE statement against the table that is being queried.
C) The COMMIT and ROLLBACK commands are allowed in the packaged function.
D) The packaged function can execute and INSERT, UPDATE, or DELETE statement against the table that is being queried if it is used in a subquery.
E) You can not use packaged functions in a query statement.

Solutions: