DBMS MCQ Questions and Answers Quiz

21. The method of access which uses key trAnsformation is known as

  1. Direct
  2. Hash
  3. Random
  4. Sequential

22. The method of access which uses key transformation is known as

  1. direct.
  2. hash.
  3. random.
  4. sequential.

23. The language used in application programs to request data from the DBMS is referred to as the

  1. DML
  2. DDL
  3. VDL
  4. SDL

24. E-R model uses this symbol to represent weak entity set ?

  1. Dotted rectangle.
  2. Diamond
  3. Doubly outlined rectangle
  4. None of these

25. The full form of DDL is

  1. Dynamic Data Language
  2. Detailed Data Language
  3. Data Definition Language
  4. Data Derivation Language

26. In E-R Diagram derived attribute are represented by

  1. Ellipse
  2. Dashed ellipse
  3. Rectangle
  4. Triangle

27. In E-R Diagram relationship type is represented by

  1. Ellipse
  2. Dashed ellipse
  3. Rectangle
  4. Diamond

28. In E-R diagram generalization is represented by

  1. Ellipse
  2. Dashed ellipse
  3. Rectangle
  4. Triangle

29. Which of the following is a comparison operator in SQL?

  1. Equals To
  2. LIKE
  3. BETWEEN
  4. All of the above

30. Which database level is closest to the users?

  1. External
  2. Internal
  3. Physical
  4. Conceptual
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