MCQ quiz on DBMS multiple choice questions and answers on DBMS MCQ questions quiz on DBMS objectives questions with answer test pdf.

DBMS MCQ Questions and Answers Quiz

1. A relational database developer refers to a record as

  1. a criteria.
  2. a relation.
  3. a tuple.
  4. an attribute.

2. Which of the following is correct:

  1. a SQL query automatically eliminates duplicates.
  2. SQL permits attribute names to be repeated in the same relation.
  3. a SQL query will not work if there are no indexes on the relations
  4. None of these

3. Cartesian product in relational algebra is

  1. a Unary operator.
  2. a Binary operator.
  3. a Ternary operator.
  4. not defined.

4. The result of the UNION operation between R1 and R2 is a relation that includes

  1. all the tuples of R1
  2. all the tuples of R2
  3. all the tuples of R1 and R2
  4. all the tuples of R1 and R2 which have common columns

5. The statement in SQL which allows to change the definition of a table is

  1. Alter.
  2. Update.
  3. Create.
  4. select.

6. A set of possible data values is called

  1. attribute.
  2. degree.
  3. tuple.
  4. domain.

7. Which of the following database object does not physically exist?

  1. base table
  2. index
  3. view
  4. none of the above

8. The ______ operator is used to compare a value to a list of literals values that have beenspecified.

  2. ANY
  3. IN
  4. ALL

9. The physical location of a record is determined by a mathematical formula that trAnsformsa file key into a record location is :

  1. B-Tree File
  2. Hashed File
  3. Indexed File
  4. Sequential file.

10. _______ produces the relation that has attributes of R1 and R2

  1. Cartesian product
  2. Difference
  3. Intersection
  4. Product

MCQ Multiple Choice Questions and Answers on DBMS

DBMS Question and Answer