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.
An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if

a.

A = 1, B = 1, S = 1

b.

A = 1, B = 1, S = 0

c.

A = 1, B = 0, S = 1

d.

A = 1, B = 0, S = 0

Discuss
Answer: (b).A = 1, B = 1, S = 0
Q82.
The greatest negative number which can be stored is 8 bit computer using 2's complement arithmetic is

a.

- 256

b.

- 128

c.

- 255

d.

- 127

Discuss
Answer: (b).- 128
Q83.
A JK flip flop has tpd= 12 ns. The largest modulus of a ripple counter using these flip flops and operating at 10 MHz is

a.

16

b.

64

c.

128

d.

256

Discuss
Answer: (d).256
Q84.
The basic storage element in a digital system is

a.

flip flop

b.

counter

c.

multiplexer

d.

encoder

Discuss
Answer: (a).flip flop
Q85.
In a ripple counter,

a.

whenever a flip flop sets to 1, the next higher FF toggles

b.

whenever a flip flop sets to 0, the next higher FF remains unchanged

c.

whenever a flip flop sets to 1, the next higher FF faces race condition

d.

whenever a flip flop sets to 0, the next higher FF faces race condition

Discuss
Answer: (a).whenever a flip flop sets to 1, the next higher FF toggles
Q86.
The access time of a word in 4 MB main memory is 100 ms. The access time of a word in a 32 kb data cache memory is 10 ns. The average data cache bit ratio is 0.95. The efficiency of memory access time is

a.

9.5 ns

b.

14.5 ns

c.

20 ns

d.

95 ns

Discuss
Answer: (b).14.5 ns
Q87.
The expression Y = ฯ€M (0, 1, 3, 4) is

a.

POS

b.

SOP

c.

Hybrid

d.

none of the above

Discuss
Answer: (a).POS
Q88.
An 8 bit DAC has a full scale output of 2 mA and full scale error of ± 0.5%. If input is 10000000 the range of outputs is

a.

994 to 1014 ฮผA

b.

990 to 1020 ฮผA

c.

800 to 1200 ฮผA

d.

none of the above

Discuss
Answer: (a).994 to 1014 ฮผA
Q89.
Decimal 43 in hexadecimal and BCD number system is respectively.

a.

B2, 01000011

b.

2B, 01000011

c.

2B, 00110100

d.

B2, 01000100

Discuss
Answer: (b).2B, 01000011
Q90.
(7BF)โ‚โ‚† = __________ โ‚‚

a.

0111 1011 1110

b.

0111 1011 1111

c.

0111 1011 0111

d.

0111 1011 0011

Discuss
Answer: (b).0111 1011 1111
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