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 24 of 117

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Q231.
Two 2's complement number having sign bits X and Y are added and the sign bit of the result is Z. then, the occurrence of overflow is indicated by the Boolean function.

a.

XYZ

b.

Xฬ… Yฬ… Zฬ…

c.

Xฬ… Yฬ…Z + XY Zฬ…

d.

XY + YZ + ZX

Discuss
Answer: (d).XY + YZ + ZX
Q232.
If A = 0101, then A' is

a.

1010

b.

1011

c.

1001

d.

0110

Discuss
Answer: (b).1011
Q233.
11011 in gray code = __________ .

a.

10010โ‚‚

b.

11111โ‚‚

c.

11100โ‚‚

d.

100012โ‚‚

Discuss
Answer: (a).10010โ‚‚
Q234.
A . 0 =

a.

1

b.

A

c.

0

d.

A or 1

Discuss
Answer: (c).0
Q235.
The number of memory locations in which 14 address bits can access is

a.

1024

b.

2048

c.

4096

d.

16384

Discuss
Answer: (d).16384
Q236.
What will be conversion rate for a counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time

a.

125

b.

125 x 10³

c.

125 x 10โถ

d.

None

Discuss
Answer: (b).125 x 10³
Q237.
A 6 bit R-2R ladder D/A converter has a reference voltage of 6.5 V. It meets standard linearity then resolution in percent and volts.

a.

3% 7 V

b.

6.4 V, 2%

c.

0.1%, 1.57 V

d.

1.57%, 0.1 V

Discuss
Answer: (d).1.57%, 0.1 V
Q238.
What will be output for decimal input 82?

a.

0.82 V

b.

8 V

c.

0.1 V

d.

10 mV

Discuss
Answer: (a).0.82 V
Q239.
Assertion (A): The access time of memory is lowest in the case of DRAM

Reason (R): DRAM uses refreshing cycle.

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R are correct but R is not correct explanation of A

c.

A is true, R is false

d.

A is false, R is true

Discuss
Answer: (d).A is false, R is true
Q240.
In a 3 input NOR gate, the number of states in which output is 1 equals

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (a).1
Page 24 of 117