PL/SQL Online Quiz


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Following quiz provides Multiple Choice Questions (MCQs) related to PL/SQL. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 2 - What will be the output of the following code snippet?

DECLARE
   a number (2) := 21;
   b number (2) := 10;
BEGIN
   
   IF ( a <= b ) THEN
      dbms_output.put_line(a);
   END IF;

   IF ( b >= a ) THEN
      dbms_output.put_line(a);
   END IF;
   
   IF ( a <> b ) THEN
      dbms_output.put_line(b);
   
   END IF;

END;

A - 2

B - 21

C - 10

D - 21, 10

Answer : C

Q 5 - What will be printed by the following PL/SQL block?

DECLARE
   a number;
PROCEDURE squareNum(x IN OUT number) IS
BEGIN
  x := x * x;
END; 
BEGIN
   a:= 5;
   squareNum(a);
   dbms_output.put_line(a);
END;

A - 5

B - 10

C - 25

D - 0

Answer : C

Q 7 - Observe the syntax given below −

CREATE [OR REPLACE ] TRIGGER trigger_name 
{BEFORE | AFTER | INSTEAD OF } 
{INSERT [OR] | UPDATE [OR] | DELETE} 
[OF col_name] 
ON table_name 
[REFERENCING OLD AS o NEW AS n] 
[FOR EACH ROW] 
WHEN (condition)  
DECLARE
   Declaration-statements
BEGIN 
   Executable-statements
EXCEPTION
   Exception-handling-statements
END;

Which of the following holds true for the WHEN clause?

A - This provides a condition for rows for which the trigger would fire and this clause is valid only for row level triggers.

B - This provides a condition for rows for which the trigger would fire and this clause is valid only for table level triggers.

C - This provides a condition for rows for which the trigger would fire and this clause is valid only for view based triggers.

D - All of the above.

Answer : A

Q 8 - Any subprogram not in the package specification but coded in the package body is called a

A - Public object.

B - Private object.

C - None of the above.

D - Both of the above.

Answer : B


plsql_questions_answers.htm

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