Communication Systems MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Communication Systems, 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 Communication Systems 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 Communication Systems mcq questions that explore various aspects of Communication Systems problems. Each MCQ is crafted to challenge your understanding of Communication Systems 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 Communication Systems 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 Communication Systems. 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 Communication Systems knowledge to the test? Let's get started with our carefully curated MCQs!

Communication Systems MCQs | Page 83 of 120

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Q821.
Frequency shifting keying is basically a method involving

a.

amplitude modulation

b.

frequency modulation

c.

phase modulation

d.

none of the above

Discuss
Answer: (b).frequency modulation
Q822.
Which of the following codes provides parity checks?

a.

CCITT-2

b.

EBCDIC

c.

ASCII

d.

Baudot

Discuss
Answer: (c).ASCII
Q823.
PA radar means

a.

Phased Array radar

b.

Pulsed Array radar

c.

Pulse Amplitude radar

d.

None of the above

Discuss
Answer: (a).Phased Array radar
Q824.
Dynamic range of hi-fi system is at least

a.

150 dB

b.

120 dB

c.

80 dB

d.

40 dB

Discuss
Answer: (c).80 dB
Q825.
A band limited signal is sampled at the Nyquist rate. The signal can be recovered by passing the samples through

a.

an RC filter

b.

an envelope detector

c.

a PPL

d.

an ideal low pass filter with the appropriate bandwidth

Discuss
Answer: (d).an ideal low pass filter with the appropriate bandwidth
Q826.
The seven segment display used in watches and clocks generally uses

a.

LED

b.

LCD

c.

Photodiode

d.

FET

Discuss
Answer: (a).LED
Q827.
If e = 10 sin(10⁸ t + 3 sin 10⁴ t) then modulating frequency is

a.

159 Hz

b.

1590 Hz

c.

1.59 MHz

d.

15.9 MHz

Discuss
Answer: (b).1590 Hz
Q828.
When a signal is quantized such that the step size S is small in comparison with the peak to peak range of the signal, the mean square quantization error is equal to

a.

S²

b.

S²/2

c.

S²/6

d.

S²/12

Discuss
Answer: (d).S²/12
Q829.
Assertion (A): Many times a radar cannot detect 'grounding hopping' military aircraft.

Reason (R): Ground interference limits the range of radar.

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 correct but R is wrong

d.

A is wrong but R is correct

Discuss
Answer: (b).Both A and R are correct but R is not correct explanation of A
Q830.
Entropies associated with an extremely unlikely message and that with an extremely likely message are respectively

a.

0 and 0

b.

1 and 1

c.

1 and 0

d.

0 and 1

Discuss
Answer: (a).0 and 0
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