Digital Communication Questions and Answers
Q1.
A local area network can be used to interconnect
Answer :
1. Computers
2. Terminals
3. Printers
Q2.
Bit stuffing is done by inserting _____, after ____ consecutive ones.
Answer :
Zero, seven
Q3.
For a throughput value of 0.20 to 0.67, which has less average delay?
Answer :
R-ALOHA
Q4.
Gaussian noise has _____ power spread _____ over all frequencies.
Answer :
Infinite, uniformly
Q5.
Uncertainty in the delay measurement is _________ to the bandwidth of signal pulse.
Answer :
Inversely proportional
Q6.
Which method is efficient?
Answer :
Dynamic allocation
Q7.
Which needs precise time coordination?
Answer :
TDMA
Q8.
The width of each channel in frequency hopping spread spectrum corresponds to
Answer :
Bandwidth of input signal
Q9.
In DSSS the signal is recovered using
Answer :
Band pass filter
Q10.
One-time pad has
Answer :
1. Random key
2. Unconditional security
3. Can be used only once
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