Digital Communication Questions and Answers
Q1.
In cipher feedback method, encryption is done on
Answer :
Single individual bits
Q2.
Which should be kept as a secret in public key cryptosystem?
Answer :
Decryption key
Q3.
In a trapdoor function, the functions are easy to go in
Answer :
One direction
Q4.
Which has a key length of 128 bits?
Answer :
IDEA
Q5.
Knapsack problem can be solved by
Answer :
Public key cryptosystem
Q6.
How can slow fading be minimized?
Answer :
By diversity technique & Error correcting codes
Q7.
Channel noise is
Answer :
1. Additive
2. White and stationary
3. Has infinite bandwidth
Q8.
Which has higher transmission rate?
Answer :
16-QAM
Q9.
The technique for combining diversity signals are
Answer :
1. Feedback
2. Maximal ratio
3. Equal gain
Q10.
What are the modes of adaptive equalizer?
Answer :
Training & Tracking mode
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