Computer Networks Objective Type Interview Questions with Answers

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Questions
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

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

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

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

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

Answer: Option [C]

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