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Oracle9i program with pl/sql Sample Questions:

1. 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 USER_ERRORS
B) SHOW FUNCTION_ERROR
C) SHOW ALL_ERRORS
D) SHOW ERRORS

2. Examine this code:
CREATE OR REPLACE PROCEDURE audit_emp
(p_id IN emp_empno%TYPE)
IS
v_id NUMBER;
PROCEDURE log_exec
IS
BEGIN
INSERT INTO log_table (user_id, log_delete)
VALUES (USER, SYSDATE);
END log_exec;
v_name VARCHAR2(20);
BEGIN
DELETE FROM emp
WHERE empno = p_id;
log_exec;
SELECT ename, empno
INTO v_name, v_id
FROM emp
WHERE empno = p_id;
END audit_emp;
Why does this code cause an error when compiled?

A) Variable v_name should be declared before declaring the LOG_EXEC procedure.
B) Procedure LOG_EXEC should be declared before any identifiers.
C) An insert statement is not allowed in a subprogram declaration.
D) The LOG_EXEC procedure should be invoked as EXECUTE log_exec with the AUDIT_EMP procedure.

3. Which statement is true about removing packages?

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

4. You need to create a trigger on the EMP table that monitors every row that is changed and places this information into the AUDIT_TABLE.What type of trigger do you create?

A) FOR EACH ROW trigger on the EMP table.
B) Statement-level trigger on the AUDIT_TABLE table.
C) FOR EACH ROW trigger on the AUDIT_TABLE table.
D) Statement-level trigger on the EMP table.
E) FOR EACH ROW statement-level trigger on the EMPtable.

5. Which code successfully calculates tax?

A) CREATE OR REPLACE FUNCTION calctax (p_no NUMBER)
RETURN NUMBER IS
v_sal NUMBER;
tax NUMBER;
BEGIN SELECT sal INTO v_sal FROM emp WHERE empno = p_no; tax := v_sal * 0.05; END
B) CREATE OR REPLACE PROCEDURE calctax (p_no IN NUMBER)
RETURN tax IS
v_sal NUMBER;
tax Number;
BEGIN
SELECT sal INTO v_sal
FROM emp
WHERE empno = p_no;
tax := v_sal * 0.05;
END;
C) CREATE OR REPLACE FUNCTION calctax (p_no NUMBER) IS
v_sal NUMBER;
tax NUMBER;
BEGIN
SELECT sal INTO v_sal
FROM emp
WHERE empno = p_no;
tax := v_sal * 0.05;
RETURN (tax);
END;
D) CREATE OR REPLACE FUNCTION calctax (p_no NUMBER)
RETURN NUMBER IS
v_sal NUMBER;
BEGIN
SELECT sal INTO v_sal
FROM emp
WHERE empno = p_no;
RETURN (v_sal * 0.05);
END;

Solutions: