GATE CS 2022: Database- 2

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:

Which of the following statements about normal forms is false?

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

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

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 _______.

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____________.