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Oracle9i program with pl/sql Sample Questions:

1. Which two program declarations are correct for a stored program unit? (Choose two)

A) CREATE OR REPLACE FUNCTION tax_amt
(p_id NUMBER)
RETURN NUMBER(10,2)
B) CREATE OR REPLACE FUNCTION tax_amt
(p_id NUMBER)
RETURN NUMBER
C) CREATE OR REPLACE PROCEDURE tax_amt
(p_id NUMBER)
RETURN NUMBER
D) CREATE OR REPLACE PROCEDURE tax_amt
(p_id NUMBER, p_amount OUT NUMBER)
E) CREATE OR REPLACE PROCEDURE tax_amt
(p_id NUMBER, p_amount OUT NUMBER(10, 2))

2. Which code can you use to ensure that the salary is not increased by more than 10% at a time nor is it ever decreased?

A) CREATE OR REPLACE TRIGGER check_sal
BEFORE UPDATE OF sal ON emp
FOR EACH ROW
WHEN (new.sal < old.sal OR
new.sal > old.sal * 1.1)
BEGIN
RAISE_APPLICATION_ERROR ( - 20508, 'Do not decrease
salary not increase by more than 10%');
END;
B) CREATE OR REPLACE TRIGGER check_sal
AFTER UPDATE OR sal ON emp
WHEN (new.sal < old.sal OR
-new.sal > old.sal * 1.1)
BEGIN
RAISE_APPLICATION_ERROR ( - 20508, 'Do not decrease
salary not increase by more than 10%');
END;
C) CREATE OR REPLACE TRIGGER check_sal
BEFORE UPDATE OF sal ON emp
WHEN (new.sal < old.sal OR
new.sal > old.sal * 1.1)
BEGIN
RAISE_APPLICATION_ERROR ( - 20508, 'Do not decrease
salary not increase by more than 10%');
END;
D) ALTER TABLE emp ADD
CONSTRAINT ck_sal CHECK (sal BETWEEN sal AND sal*1.1);

3. Which two statements are true about LOBs? (Choose two.)

A) The Oracle9i server performs implicit conversions between CLOBs and VARCHAR2 data types
B) All LOBs have read and write access
C) BFILES are stored in the database
D) The Oracle9i server performs implicit conversions between BLOBs and NUMBER data types
E) NCLOB represents a multi-byte character object

4. Which statement is true?

A) Stored functions do not permit calculations that involve database links in a distributed environment.
B) Stored functions can increase the efficiency of queries by performing functions in the query rather than in the application.
C) Stored functions cannot manipulate new types of data, such as longitude and latitude.
D) Stored functions can be called from the SELECT and WHERE clauses only.

5. You need to remove the database triggerBUSINESS_HOUR.Which command do you use to remove the trigger in the SQL *Plus environment?

A) DELETE FROM USER_TRIGGERS
WHERE TRIGGER_NAME = 'BUSINESS_HOUR';
B) ALTER TRIGGER business_hour REMOVE;
C) DELETE TRIGGER business_hour;
D) DROP TRIGGER business_hour;
E) REMOVE TRIGGER business_hour;

Solutions: