PL/SQL Online Quiz

Q 1 - Which of the following is not true about the execution section of a PL/SQL block?

A - It should have more than one executable line of code.

B - It may have just a NULL command to indicate that nothing should be executed.

C - The statements must always end with a semicolon.

D - The section may contain SQL commands, logical control commands, assignment commands, as well as other commands.

Q 2 - Which of the following is not true about large object data types and in PL/SQL?

A - BFILE is used to store large binary objects in operating system files outside the database.

B - BLOB is used to store character data in the database.

C - CLOB is used to store large blocks of character data in the database.

D - NCLOB is used to store large blocks of NCHAR data in the database.

Q 3 - What will be the output of the following code snippet?

DECLARE
   a number(3) := 100;
   b number(3) := 200;
BEGIN
   IF( a = 100 ) THEN
      IF( b <> 200 ) THEN
         dbms_output.put_line(b);
      END IF;
   END IF;
   dbms_output.put_line(a);
END;

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

B - 200

C - 200

     100

D - 100

Q 4 - Which of the following is true about the PL/SQL data structure VARRAY?

A - It also has a maximum size that cannot be changed.

B - A VARRAY type is created with the CREATE VARRAY statement, at the schema level.

C - Maximum size of a VARRAY can be changed using the ALTER TYPE statement.

D - Maximum size of a VARRAY can be changed using the ALTER VARRAY statement.

Q 5 - Which of the following is a way of passing parameters to PL/SQL subprograms?

A - Positional notation

B - Named notation

C - Mixed notation

D - All of the above.

Q 6 - Which of the following code will open a cursor named cur_employee?

A - OPEN cur_employee;

B - OPEN CURSOR cur_employee;

C - FETCH cur_employee;

D - FETCH CURSOR cur_employee;

Q 7 - Which of the following is not a benefit of a database trigger?

A - Enforcing referential integrity

B - Event logging and storing information on table access

C - Allowing invalid transactions

D - Generating some derived column values automatically

Q 8 - Which of the following is not true about PL/SQL collections?

A - A collection is an ordered group of elements having the same data type.

B - A collection is an ordered group of elements having different data type.

C - Each element is identified by a unique subscript that represents its position in the collection.

D - Nested tables and Varrays are types of PL/SQL collections.

Q 9 - The collection method LIMIT

A - Returns the last (largest) index numbers in a collection that uses integer subscripts.

B - Returns the number of elements that a collection currently contains.

C - Checks the Maximum Size of a Collection.

D - None of the above.

Q 10 - Which of the following is not true about the comparison methods?

A - These are used for comparing objects.

B - The Map method is a function implemented in such a way that its value doesn’t depend upon the value of the attributes.

C - The Order methods implement some internal logic for comparing two objects.

D - None of the above.