June 12, 2021

Structured Sequence MCQ’s

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This set of Digital Communications Systems Multiple Choice Questions & Answers (MCQs) focuses on “Structured Sequence”.

1. In binary symmetric channel, in the demodulator _____ decision is made.
a) Hard
b) Soft
c) Hard & Soft
d) None of the mentioned

2. The ratio of redundant bits to data bits is called as
a) Code rate
b) Redundancy rate
c) Symbol rate
d) Transmission rate

3. The probability of message error is written as
a) Block error
b) Word error
c) Block & Word error
d) None of the mentioned

4. Coding gain is defined as
a) Reduction in Eb/N0
b) Increase in Eb/N0
c) Same as Eb/N0
d) None of the mentioned

5. Structured sequences are
a) Block codes
b) Convolutional codes
c) Turbo codes
d) All of the mentioned

6. If the parity bit takes value one then the summation of code-word gives
a) Even result
b) Odd result
c) Even & Odd result
d) None of the mentioned

7. The capacity per cell is ______ Eb/N0.
a) Directly proportional
b) Inversely proportional
c) Double the
d) Half the

8. The summation operation is performed using _____ logical operation.
a) EX-OR
b) AND
c) OR
d) EX-NOR

9. Which decoders are less complex?
a) Soft decision decoder
b) Hard decision decoder
c) Hard & Soft decision decoder
d) None of the mentioned

10. In a real time communication system addition of redundant bits leads to
a) More bandwidth requirement
b) Faster rate of transmission
c) More bandwidth requirement & Faster rate of transmission
d) None of the mentioned

11. In Gaussian channel demodulator ______ decision is made.
a) Hard
b) Soft
c) Hard & Soft
d) None of the mentioned

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