Digital Fundamentals (3130704) MCQs

MCQs of Combinational Digital Circuits

Showing 1 to 8 out of 8 Questions
1.

How many control lines are there in 128 X 1 multiplexer?

(a)

8
(b)

6
(c)

7
(d)

5
Answer:

Option (c)

2.

Which of the following is not valid encoder?

(a)

8 X 3
(b)

5 X 32
(c)

2 X 1
(d)

All are valid
Answer:

Option (b)

3.

Select the correct combination of gates to contruct Half Adder with only AOI logic.

(a)

AND = 1, OR = 3, NOT = 2 
(b)

AND = 3, OR = 1, NOT = 2 
(c)

AND = 2, OR = 1, NOT = 0 
(d)

AND = 3, OR = 3, NOT = 1 
Answer:

Option (b)

4.

Select the correct combination of gates to contruct Half Subtractor with only AOI logic.

(a)

AND = 1, OR = 3, NOT = 2 
(b)

AND = 1, OR = 2, NOT = 2 
(c)

AND = 3, OR = 1, NOT = 2 
(d)

AND = 2, OR = 1, NOT = 2 
Answer:

Option (d)

5.

An 8-square is called?

(a)

a pair
(b)

a quad
(c)

an octet
(d)

a cube
Answer:

Option (c)

6.

The code used for labelling cells of the K-map is

(a)

natural BCD
(b)

Hexadecimal
(c)

Gray
(d)

Octal
Answer:

Option (c)

7.

A multiplexer is also known as

(a)

a data accumulator
(b)

a data restorer
(c)

a data selector
(d)

a data distributor
Answer:

Option (c)

8.

The difference output in a full-subtractor is the same as the

(a)

difference output of a half-subtractor
(b)

sum output of a half-adder
(c)

sum output of a full-adder
(d)

carry output of a full-adder
Answer:

Option (c)

Showing 1 to 8 out of 8 Questions