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Q.

The _______operation performs a set union of two

A

Union

B

Join

C

Product

D

Intersect

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MCQ

1.

The subset of a super key is a candidate key under what condition?

A

No proper subset is a super key

B

All subsets are super keys

C

Subset is a super key

D

Each subset is a super key

Discussion

MCQ

2.

The _______operation performs a set union of two

A

Union

B

Join

C

Product

D

Intersect

Discussion

MCQ

3.

The _____________ is essentially used to search for patterns in target string.

A

Like Predicate

B

Null Predicate

C

In Predicate

D

Out Predicate

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4.

Which of the following is a fundamental operation in relational algebra?

A

Set intersection

B

Natural join

C

Assignment

D

None of the mentioned

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MCQ

5.

A query in the tuple relational calculus is expressed as:

A

{t | P() | t}

B

{P(t) | t }

C

{t | P(t)}

D

All of the mentioned

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