Logical Database Design - Study Mode
[#16] An enterprise key is a primary key whose value is unique for a given relation.
Correct Answer
(B) False
[#17] A composite attribute does not get mapped into a relation.
Correct Answer
(A) True
[#18] A relation is a two-dimensional table.
Correct Answer
(A) True
[#19] Weak entities do not get mapped into a relation.
Correct Answer
(B) False
[#20] A primary key may be null.
Correct Answer
(B) False