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