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# GATE CS 2022: Database- 2

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Question 1

Consider a relation R (A, B, C, D, E) with the following functional dependencies:

ABC  DE

D  AB

The number of super keys of R is:

Question 2

Which of the following statements about normal forms is false?

Question 3

From the following instance of relational schema R (A, B, C), We can conclude that: Question 4

In domain relational calculus "there exist" can be represented as-

Question 5

Consider a relation R (A, B, C, D, E) with the following functional dependencies:

A BC

C E

B D

E A

The total numbers of super keys present in the relation are _______.

Question 6

For the given relation R (ABCDE) with the following functional dependencies

F= {A→BC, B→D, CD→E, E→A}

The number of candidate keys are____________.

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