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Computer Networks Objective Type Interview Questions with Answers

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Download in pdf multiple choice questions(mcqs) & answers on Fundamentals of Data Communication. These general awareness quiz objective questions answers include mcqs on attenuation, baud rate etc.
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(11) The loss of power a signal suffers as it travels from the transmitting computer to a receiving computer is :
[A] echo
[B] jitter
[C] spiking
[D] attenuation

Comment

Answer: Option [D]

Attenuation refers to the loss of signal strength during transmission.

(12) An effective way to prevent attenuation is :
[A] adding repeaters or amplifiers to a circuit
[B] compressing a circuit
[C] shielding wires
[D] none of these above

Comment

Answer: Option [A]

Attenuation can be prevented by adding amplifiers or repeaters at approximately spaced points.

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(13) Baud rate is :
[A] number of signal changes per second
[B] number of bits per second
[C] number of bytes per seconde
[D] number of ASCII characters per second

Comment

Answer: Option [A]

Baud rate refers to the number of signal changes per second.

(14) The maximum data rate that a medium of 10 KHz and signal to noise ratio of 30dB is roughly
[A] 10Kbps
[B] 30Kbps
[C] 100Kbps
[D] 3Kbps

Comment

Answer: Option [B]

Using channel capacity formula of Shannon : we get

C = W * log2(1 + S/N)

30 dB S/N = 1000 S/N

C = 3000*log2(1 + 1000)

C = 30 Kbps

(15) Which of the following medium does not use metallic conductor for transmission ?
[A] Twisted pair
[B] Coaxial cable
[C] Optical fiber
[D] None of these above

Comment

Answer: Option [C]

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DATA COMMUNICATION & COMPUTER NETWORKS – MULTIPLE CHOICE QUESTIONS AND ANSWERS | 250 MCQS

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