Database MCQ’s for teachers test

Database MCQ’s for teachers test

1. Who proposed the relational model?

a) Charles Babbage

b) Bill Gates

c) Herman Hollerith

d) E.F Codd

Answer - Click Here:
A

2. Primary key must be …

a) null

b) non null

c) constant

d) none

Answer - Click Here:
B

3. In DBMS, a relation is a …

a) subset of the cartesian product of list of domains

b)  subset of the cartesian product of list of tuple

c)  subset of the cartesian product of list of attributes

d)  subset of the cartesian product of list of relations

[su_spoiler title=”Answer – Click Here:” class=”padding: -10px;”]A[/su_spoiler]

4. Minimal superkeys are known as …

a) candidate keys

b) attribute keys

c) domain keys

d) schema keys

Answer - Click Here:
A

5. Which function is not included in database?

a) delete

b) update

c) insert

d) sorting

Answer - Click Here:
B

6. What is the degree of a relationship i n model?

a) number of participating entities

b) number of rows and columns

c) number of tables

d) number of entities

Answer - Click Here:
A

7. How we organize data in hierarchical model?

a) physical structure

b)  logical struture

c) tree like structure

d) none

Answer - Click Here:
C