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 9 of 117

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Q81.
For the logic circuit of the given figure, the minimized expression is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q82.
The inputs to a NAND gate are as shown in the given figure. The waveform of output is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q83.
In the given figure A = 1, B = 1. B is now changed to a sequence 101010................The outputs X and Y will be

a.

fixed at 0 and 1 respectively

b.

X = 1010.......and Y = 0101........

c.

X = 1010..........and Y = 1010

d.

fixed at 1 and 0 respectively

Discuss
Answer: (a).fixed at 0 and 1 respectively
Q84.
In 8085 microprocessor, what are the contents of register SP, after the interrupt has been started?

a.

0210 H

b.

0211 H

c.

054 CH

d.

054 EH

Discuss
Answer: (c).054 CH
Q85.
To have the multiprocessing capabilities of the 8086 microprocessor, the pin connected to the ground is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q86.
A gate in which shift register is connected as shown in the figure below. How many clock pulse (after reset to '0') the contents of the shift register are '000' again?

a.

3

b.

6

c.

16

d.

8

Discuss
Answer: (b).6
Q87.
For the K map of the given figure the simplified Boolean expression is

a.

ACฬ… + Aฬ… Bฬ…

b.

A Bฬ…Cฬ… + Aฬ… Bฬ… Cฬ… + Aฬ… Bฬ… C + AB Cฬ…

c.

ACฬ… + Aฬ… Bฬ… + AC

d.

A Cฬ… + Aฬ… Bฬ… + AB

Discuss
Answer: (a).ACฬ… + Aฬ… Bฬ…
Q88.
Figure shows three pulse train inputs to a 3-input AND gate. Assuming positive logic, the output signal obtained in figure would be

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q89.
A 12-bit binary counter has the following state. The octal number represented is

a.

677

b.

7163

c.

7128

d.

7183

Discuss
Answer: (b).7163
Q90.
For the K map of the given figure the simplified Boolean expression is

a.

Aฬ… + BC

b.

A + BC

c.

Aฬ… + B Cฬ…

d.

Aฬ… + B Cฬ…

Discuss
Answer: (a).Aฬ… + BC
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