PL/SQL Online Quiz

Answer : C

Q 2 - Which of the following is true about scalar data types in PL/SQL?

A - They hold single values with no internal components.

B - Examples of scalar data types are NUMBER, DATE, or BOOLEAN.

C - PL/SQL provides subtypes of data types.

Answer : D

Q 3 - What is the output of the following code?

DECLARE
   grade char(1) := 'B';
BEGIN
   case 
      when grade = 'A' then dbms_output.put_line('Excellent');
      when grade = 'B' then dbms_output.put_line('Very good');
      when grade = 'C' then dbms_output.put_line('Well done');
      when grade = 'D' then dbms_output.put_line('You passed');
      when grade = 'F' then dbms_output.put_line('Better try again');
      else dbms_output.put_line('No such grade');
   end case;
END;

A - It has syntax error, so there will not be any output.

B - B

C - Very good

D - No such grade

Answer : C

Q 4 - Consider the following code snippet: how many times the loop will run?

DECLARE
   a number(2);
BEGIN
   FOR a in 10 .. 20 LOOP
       END LOOP;
END;

Answer : A

Q 5 - Which of the following is true about PL/SQL cursors?

A - Explicit cursors are automatically created by Oracle.

B - Implicit cursors are programmer defined cursors.

C - The most recent implicit cursor is called the SQL cursor, and has the attributes like %FOUND, %ISOPEN, %NOTFOUND, and %ROWCOUNT.

D - All of the above.

Answer : C

Q 6 - Which of the following code will successfully declare an exception named emp_exception1 in a PL/SQL block?

A - EXCEPTION emp_exception1;

B - emp_exception1 EXCEPTION;

C - CREATE EXCEPTION emp_exception1;

D - CREATE emp_exception1 AS EXCEPTION;

Answer : B

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;

The optional [FOR EACH ROW] clause specifies

A - A table with index.

B - A table with primary key.

C - A row level trigger.

D - A table with a unique key.