True Or False

Question 1 :

An enterprise key is a primary key whose value is unique for a given relation.


A). True
B). False
Answer : Option B

Question 2 :

A composite attribute does not get mapped into a relation.


A). True
B). False
Answer : Option A

Question 3 :

A relation is a two-dimensional table.


A). True
B). False
Answer : Option A

Question 4 :

Weak entities do not get mapped into a relation.


A). True
B). False
Answer : Option B

Question 5 :

A primary key may be null.


A). True
B). False
Answer : Option B