Digital Communication Questions and Answers
Q1.
Synchronous ciphers uses
Answer :
Confusion
Q2.
In public key cryptosystem _____ keys are used for encryption and decryption.
Answer :
Different
Q3.
Private key algorithm is used for _____ encryption and public key algorithm is used for _____ encryption.
Answer :
Messages, session key
Q4.
A cryptographic hash function has variable output length.
Answer :
False
Q5.
Fading channel has memory.
Answer :
True
Q6.
The ISI and adjacent channel interference is removed by
Answer :
Cancelling filter & Port processing equalizer
Q7.
In matched filter _______ is performed.
Answer :
Convolution & Correlation
Q8.
For neyman pearson decision criterion, which are important?
Answer :
Probability of false alarm & miss
Q9.
Which is more effective and commonly preferred technique?
Answer :
Spatial diversity
Q10.
Interleaving does
Answer :
Forward error correction
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