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Oracle9i program with pl/sql Sample Questions:

1. What is true about stored procedures?

A) A stored procedure uses the DELCLARE keyword in the procedure specification to declare formal parameters.
B) A stored procedure is named PL/SQL block with at least one parameter declaration in the procedure specification.
C) A stored procedure uses the DECLARE keyword in the procedure body to declare formal parameters.
D) A stored procedure must have at least one executable statement in the procedure body.

2. Which statements are true? (Choose all that apply)

A) If errors occur during the compilation of a trigger you can use the SHOW ERRORS command within iSQL *Plus to see the compilation errors.
B) If errors occur during the compilation of a trigger, the trigger is still created.
C) If errors occur during the compilation of a trigger you can go into SQL *Plus and query the USER_ERRORS data dictionary view to see compilation errors.
D) If errors occur during the compilation of a trigger you can go into SQL *Plus and query the USER_TRIGGERS data dictionary view to see the compilation errors.

3. Examine this package:
CREATE OR REPLACE PACKAGE manage_emps
IS
tax_rate CONSTANT NUMBER(5,2) := .28;
v_id NUMBER;
PROCEDURE insert_emp (p_deptno NUMBER, p_sal NUMBER);
PROCEDURE delete_emp;
PROCEDURE update_emp;
FUNCTION calc_tax (p_sal NUMBER)
RETURN NUMBER;
END manage_emps;
/
CREATE OR REPLACE PACKAGE BODY manage_emps
IS
PROCEDURE update_sal
(p_raise_amt NUMBER)
IS
BEGIN UPDATE emp SET sal = (sal * p_raise_emt) + sal WHERE empno = v_id; END; PROCEDURE insert_emp (p_deptno NUMBER, p_sal NUMBER) IS BEGIN INSERT INTO emp(empno, deptno, sal) VALYES(v_id, p_depntno, p_sal); END insert_emp; PROCEDURE delete_emp IS BEGIN DELETE FROM emp WHERE empno = v_id; END delete_emp; PROCEDURE update_emp IS v_sal NUMBER(10, 2); v_raise NUMBER(10, 2); BEGIN SELECT sal INTO v_sal FROM emp WHERE empno = v_id; IF v_sal < 500 THEN v_raise := .05; ELSIP v_sal < 1000 THEN v_raise := .07; ELSE v_raise := .04; END IF; update_sal(v_raise); END update_emp; FUNCTION calc_tax (p_sal NUMBER) RETURN NUMBER IS BEGIN RETURN p_sal * tax_rate;
END calc_tax;
END manage_emps;
/
How many public procedures are in the MANAGE_EMPS package?

A) Three
B) Two
C) Four
D) One
E) Five

4. Which statement is true about removing packages?

A) Removing the package body removes the specification too
B) You must remove the package body first
C) You must remove both the package body and the specification separately
D) Removing a package specification removes the body too
E) Removing a package specification removes all stand alone stored functions named in the specification

5. You have an AFTER UPDATE row-level on the table EMP. The trigger queries the EMP table and inserts the updating user's information into the AUDIT_TABLE.
What happens when the user updates rows on the EMP table?

A) The trigger fires successfully. The update on the EMP table occurs, and data is inserted into theAUDIT_TABLE table.
B) A compile time error occurs.
C) A runtime error occurs. The update on the EMP table does not take place, but the insert into the AUDIT_TABLE occurs.
D) A runtime error occurs. The effect of trigger body is rolled back, but the update on the EMP table takes place.
E) A runtime error occurs. The effect of trigger body and the triggering statement are rolled back.

Solutions: