Digital Electronics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Digital Electronics, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Digital Electronics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Digital Electronics mcq questions that explore various aspects of Digital Electronics problems. Each MCQ is crafted to challenge your understanding of Digital Electronics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Digital Electronics MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Digital Electronics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Digital Electronics knowledge to the test? Let's get started with our carefully curated MCQs!

Digital Electronics MCQs | Page 2 of 117

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Q11.
In the given figure shows a 4 bit serial in parallel out right shift register. The initial contents as shown are 0110. After 3 clock pulses the contents will be

a.

0000

b.

0101

c.

1010

d.

1111

Discuss
Answer: (c).1010
Q12.
The circuit of the given figure is

a.

full adder

b.

full subtractor

c.

shift register

d.

decade counter

Discuss
Answer: (b).full subtractor
Q13.
In the given figure, A = B = 1 and C = D = 0. Then Y =

a.

1

b.

0

c.

either 1 or 0

d.

indeterminate

Discuss
Answer: (b).0
Q14.
The gates G1 and G2 in the figure have propagation delays of 10 n sec. and 20 n sec. respectively. If the input Vi makes an output change from logic 0 to 1 at time t = t₀ then the output wavefrom V₀ is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q15.
The K-map for a Boolean function is shown in figure. The number of essential prime implicants for this function is

a.

4

b.

5

c.

6

d.

8

Discuss
Answer: (a).4
Q16.
In the given figure, the flip flop is

a.

negative edge triggered

b.

positive edge triggered

c.

level triggered

d.

either (a) or (c)

Discuss
Answer: (a).negative edge triggered
Q17.
The modulus of counter in the given figure is

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (c).3
Q18.
For the ring oscillator shown in the figure, the propagation delay of each inverter is 100 pico sec. What is the fundamental frequency of the oscillator output __________

a.

10 MHz

b.

100 MHz

c.

1 GHz

d.

2 GHz

Discuss
Answer: (d).2 GHz
Q19.
For the circuit of the given figure, the output equation is

a.

Y = ABCD

b.

Y = AB + CD

c.

Y = A + BCD

d.

Y = ABC + D

Discuss
Answer: (b).Y = AB + CD
Q20.
The inputs A, B, C of the given figure are applied to a 3 input NOR gate. The output is

a.

HIGH from 4 to 0

b.

LOW from 0 to 4

c.

HIGH from 0 to 1 and LOW from 1 to 4

d.

LOW from 0 to 2 and HIGH from 2 to 4

Discuss
Answer: (c).HIGH from 0 to 1 and LOW from 1 to 4
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