Digital Communication Questions and Answers
Q1.
Which modulation scheme is preferred for direct sequence spread spectrum process?
Answer :
BPSK & QPSK
Q2.
Which type of demodulator is used in the frequency hopping technique?
Answer :
Non coherent
Q3.
Which duration is shorter?
Answer :
Hop duration
Q4.
If the initial pulse of 1000 is fed to shift register, after how many clock pulses does the sequence repeat?
Answer :
15
Q5.
Pulse jammer consists of
Answer :
Pulse modulated band-limited noise
Q6.
To increase error probability, the processing gain should be
Answer :
Increased
Q7.
For digital signatures private key cryptosystem is used.
Answer :
False
Q8.
The key size of DES is
Answer :
56 bits
Q9.
The digital signature provides authentication to the
Answer :
Sender & Message
Q10.
Encryption transformations are known as
Answer :
Diffusion & Confusion
🎕🎕🎕
🎕🎕🎕
0 Comments