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Computer Science Set-1
Databases
23

Databases MCQ with Answers

23) The employee salary should not be greater than Rs. 2000. This is

integrity constraint

referential constraint

over-defined constraint

feasible constraint

Answer is:

integrity constraint

Databases MCQ with Answers

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Related Databases MCQ with Answers

25) Updating a data base means

revising the file structure

reorganizing the database

modifying or adding record occurrences

All of these

Answer is:

revising the file structure

26) Which of the following contains complete record of all activity that affected the contents of a database during a certain period of time

4-GL

d-BASE

Oracle

SQL

Answer is:

d-BASE

27) In tuple relational calculus P1 → P2 is equivalent to

¬ P1 ∨ P2

P1 ∨ P2

P1 ∧ P2

P1 ∧ ¬P2

Answer is:

¬ P1 ∨ P2

28) A logical schema

Is the entire database.

describe data in terms of relational tables and columns, object-oriented classes, and XML tags.

Describes how data is actually stored on disk.

Both (A) and (C)

Answer is:

Is the entire database.

Databases MCQ with Answers

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