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 32 of 117

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Q311.
The inputs to a 3 bit binary adder are 111โ‚‚ and 110โ‚‚. The output will be

a.

101

b.

1101

c.

1111

d.

1110

Discuss
Answer: (b).1101
Q312.
The input to a parity detector is 1001. The output is

a.

0

b.

1

c.

0 or 1

d.

indeterminate

Discuss
Answer: (a).0
Q313.
A 4 bit modulo 16 ripple counter uses JK flip-flops. If the propagation delay of each FF is 50 ns. The max. clock frequency that can be used is equal to

a.

20 MHz

b.

10 MHz

c.

5 MHz

d.

4 MHz

Discuss
Answer: (c).5 MHz
Q314.
As the number of flip flops are increased, the total propagation delay of

a.

ripple counter increases but that of synchronous counter remains the same

b.

both ripple and synchronous counters increase

c.

both ripple and synchronous counters remain the same

d.

ripple counter remains the same but that of synchronous counter increases

Discuss
Answer: (a).ripple counter increases but that of synchronous counter remains the same
Q315.
In a 4 input OR gate, the total number of High outputs for the 16 input states are

a.

16

b.

15

c.

14

d.

13

Discuss
Answer: (b).15
Q316.
If A is 1011, A" is

a.

1011

b.

0100

c.

1100

d.

1010

Discuss
Answer: (a).1011
Q317.
Which of the following is not a characteristic of a flip flop?

a.

It is a bistable device

b.

It has two outputs

c.

It has two outputs are complement of each other

d.

It has one input terminal

Discuss
Answer: (d).It has one input terminal
Q318.
The number of flip flops needed for a Mod 7 counter are

a.

7

b.

5

c.

3

d.

1

Discuss
Answer: (c).3
Q319.
For AB + Aฬ…C + BC = AB + Aฬ…C the dual form is

a.

(A + B) (Aฬ… + C)(B + C) = (A + B)(Aฬ… + C)

b.

(Aฬ… + B ) (A + Cฬ…)(Bฬ… + Cฬ…) = (Aฬ… + Bฬ…)(A + Cฬ…)

c.

(A + B) (A + C) (B + C) = (Aฬ… + Bฬ…) (Aฬ… + C)

d.

none of the above

Discuss
Answer: (a).(A + B) (Aฬ… + C)(B + C) = (A + B)(Aฬ… + C)
Q320.
A DAC has full scale output of 5 V. If accuracy is ± 0.2% the maximum error for an output of 1 V is

a.

5 mV

b.

10 mV

c.

2 mV

d.

20 mV

Discuss
Answer: (b).10 mV
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