Ease of searching

Sequential ordering of a file

Both 1) Ease of searching and 2) Sequential ordering of a file

None of these

A

B

C

D

An entity can have more than one attrbute

An attribute of an entity can be composite.

In row of a relational table, an attribute have more than one value.

In row of a relational table, an attribute can have exactly one value or a NULL value.

(i), (iv), (vi), (viii)

(i), (iv), (vii)

(i), (iii), (v), (vi), (viii)

(ii) , (v) , (viii)

S ⊂ r

r ∪ s = r

r ⊂ s

r*s = s