This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Abstraction and layering”.
1. Top layer is
a) Physical media
b) Application
c) Design
d) None of the mentioned
View Answer
Explanation: Top layer is application where as bottom layer is physical media.
2. Entities also does
a) Error correction
b) A/D
c) D/A
d) All of the mentioned
View Answer
Explanation: Entities also does A/D, D/A, encryption and error correction.
3. In channel, delay is
a) Fixed
b) Variable
c) Fixed & Variable
d) None of the mentioned
View Answer
Explanation: In channel, delay can be either fixed or variable.
4. Channel can provide connectivity to
a) Point to point
b) 1 to many
c) Many to many
d) All of the mentioned
View Answer
Explanation: Channel can provide connectivity between point to point, 1 to many and also many to many.
5. Embedding is a form of
a) Abstraction
b) Layering
c) Entity sharing
d) None of the mentioned
View Answer
Explanation: Embedding is a form of layering.
6. Transmission media is
a) Acoustic
b) Guided
c) Optical
d) All of the mentioned
View Answer
Explanation: Transmission media can be acoustic, electronic or optical form.
7. In transmission media, the symbol type is generally
a) Analog
b) Digital
c) Analog & Digital
d) None of the mentioned
View Answer
Explanation: In transmission media, the symbol type is generally analog signals.
8. Noise is _____ in nature.
a) Random
b) Systematic
c) Random or Systematic
d) None of the mentioned
View Answer
Explanation: Noise can be random or systematic.
9. The radiation loss increases as
a) Frequency increases
b) Frequency decreases
c) Does not depend on frequency
d) None of the mentioned
View Answer
Explanation: The radiation loss increases as frequency increases.
10. Attenuation is a function of
a) Channel length
b) Transmission media
c) Signal frequencies
d) All of the mentioned
View Answer
Explanation: Attenuation is a function of channel length, transmission media and signal frequencies.
Sanfoundry Global Education & Learning Series – Digital Communications.
To practice all areas of Digital Communications, here is complete set of 1000+ Multiple Choice Questions and Answers.
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