Digital Communication Questions and Answers
Q1.
LAN uses _________ cables.
Answer :
High bandwidth
Q2.
As channel capacity increases, channel throughput
Answer :
Increases
Q3.
Binary tree search is used for
Answer :
Multiple users
Q4.
Jamming is caused by
Answer :
Multipath & Natural phenomena
Q5.
Uncertainty in the delay measurement is _______ to rise time of the pulse.
Answer :
Directly proportional
Q6.
Which has a lesser average packet delay?
Answer :
TDMA
Q7.
Spread spectrum is a ______ technique.
Answer :
Encoding
Q8.
The transmitter of frequency hopping system is fed with encoding scheme such as
Answer :
Frequency & Binary phase shift keying
Q9.
Which are called as substitution encryption techniques?
Answer :
Caesar & Trithemius cipher
Q10.
Perfect secrecy can be achieved for
Answer :
Infinite number of messages
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