Digital Communications

Abstraction and Layering

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Top layer is
Physical media
Application
Design
None of the mentioned
Explanation:
Top layer is application where as bottom layer is physical media.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Entities also does
Error correction
A/D
D/A
All of the mentioned
Explanation:
Entities also does A/D, D/A, encryption and error correction.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Attenuation is a function of
Channel length
Transmission media
Signal frequencies
All of the mentioned
Explanation:
Attenuation is a function of channel length, transmission media and signal frequencies.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
In channel, delay is
Fixed
Variable
Fixed & Variable
None of the mentioned
Explanation:
In channel, delay can be either fixed or variable.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Channel can provide connectivity to
Point to point
1 to many
Many to many
All of the mentioned
Explanation:
Channel can provide connectivity between point to point, 1 to many and also many to many.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
The radiation loss increases as
Frequency increases
Frequency decreases
Does not depend on frequency
None of the mentioned
Explanation:
The radiation loss increases as frequency increases.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
In transmission media, the symbol type is generally
Analog
Digital
Analog & Digital
None of the mentioned
Explanation:
In transmission media, the symbol type is generally analog signals.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Embedding is a form of
Abstraction
Layering
Entity sharing
None of the mentioned
Explanation:
Embedding is a form of layering.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Transmission media is
Acoustic
Guided
Optical
All of the mentioned
Explanation:
Transmission media can be acoustic, electronic or optical form.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Noise is _____ in nature.
Random
Systematic
Random or Systematic
None of the mentioned
Explanation:
Noise can be random or systematic.