1
If E1 and E2 are relational algebra expressions, then which of the following is NOT a relational algebra expression ?

Answer: Option [B]

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Questions

1
If E1 and E2 are relational algebra expressions, then which of the following is NOT a relational algebra expression ?

Answer: Option [B]

2
The operation of a relation X, produces Y, such that Y contains only selected attributes of X. Such an operation is :

Answer: Option [A]

3
If T1 and T2 are two relations, then which of the following is not a valid relational algebra expression ?

Answer: Option [D]

4
Which of the following is not valid unary operation in the relational algebra ?

Answer: Option [B]