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Welcome to the Physical Layer MCQs Page

Dive deep into the fascinating world of Physical Layer with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Physical Layer, a crucial aspect of Networking. In this section, you will encounter a diverse range of MCQs that cover various aspects of Physical Layer, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Networking.

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Check out the MCQs below to embark on an enriching journey through Physical Layer. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Networking.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Physical Layer. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Physical Layer MCQs | Page 23 of 24

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Q221.
SNR (signal to noise ratio) is equals to

a.

Avg signal power/Avg noise power

b.

Avg signal power/Avg distortion

c.

Avg noise power/Attenuation

d.

Avg Attenuation/Avg distortion

Discuss
Answer: (a).Avg signal power/Avg noise power
Q222.
One Picoseconds (PS) is equivalent to

a.

10-3 s

b.

10-6 s

c.

10-9 s

d.

10-12 s

Discuss
Answer: (d).10-12 s
Q223.
We cannot send the digital signal directly to the channel, when the channel is

a.

bandpass

b.

Bypass

c.

baseband

d.

Low pass

Discuss
Answer: (a).bandpass
Q224.
The difference in the delay of the signal may create a difference in

a.

Phase

b.

Frequency

c.

Period

d.

Decibel

Discuss
Answer: (a).Phase
Q225.
Signal to Noise Ratio is the ratio of the two

a.

Signals

b.

Powers

c.

Noise

d.

Frequencies

Discuss
Answer: (b).Powers
Q226.
According to Fourier analysis, any composite signal is a combination of sine waves with

a.

diff frequencies amplitude, and phase

b.

different frequencies

c.

same frequencies

d.

same frequencies with amplitude and phase

Discuss
Answer: (a).diff frequencies amplitude, and phase
Q227.
How many factors data rate limit depends on

a.

One

b.

two

c.

four

d.

three

Discuss
Answer: (d).three
Q228.
Consider the below figure. What are the bits transmitted for the Unipolar system?

a.

01101

b.

11010

c.

10110

d.

01001

Discuss
Answer: (c).10110
Q229.
If a periodic signal is decomposed into five sine waves with frequencies of 100, 300, 500, 700, and 900 Hz, what is its bandwidth?

a.

2500 Hz

b.

900 Hz

c.

800 Hz

d.

can’t be determined with the information given

Discuss
Answer: (c).800 Hz
Q230.
Assume we need to download text documents at the rate of 100 pages per second. What is the required bit rate of the channel?

a.

1.846 Mbps

b.

1.536 Mbps

c.

2.4 Mbps

d.

None of the Mentioned

Discuss
Answer: (b).1.536 Mbps
Page 23 of 24

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