Digital Communications Mock Test 7

10%

Question 1 of 10

1. In spread spectrum technique, the desired signal is multiplied _____ and interference signal is multiplied _____

Twice, once

Twice, thrice

Thrice, twice

Once, twice

Question 1 of 10

Question 2 of 10

2. To avoid the loop to be driven to lock, the sweep rate should be

Smaller

None of the mentioned

It does not depend on it

Larger

Question 2 of 10

Question 3 of 10

3. TDM is used to

To protect all small signals in PCM from quantizing noise

To use different frequency bands for different signals

Increase the information transmission rate

Use only one carrier frequency to handle different signals

Question 3 of 10

Question 4 of 10

4. Gaussian noise has _____ power spread _____ over all frequencies.

Zero, non uniformly

Infinite, non uniformly

Infinite, uniformly

Zero, uniformly

Question 4 of 10

Question 5 of 10

5. In which technique, packet size are constant?

Pure & Slotted Aloha

Slotted Aloha

Pure Aloha

None of the mentioned

Question 5 of 10

Question 6 of 10

6. Pseudorandom signal ________ predicted.

None of the mentioned

Can be

maybe

Cannot be

Question 6 of 10

Question 7 of 10

7. A mechanism for breaking the problem down is

Entity sharing

Dividing

Abstraction

Layering

Question 7 of 10

Question 8 of 10

8. Continuous phase modulation has

More bandwidth efficiency

More smoothness

None of the mentioned

More bandwidth efficiency & smoothness

Question 8 of 10

Question 9 of 10

9. The interface between the ring and the stations are passive.

True

False

Question 9 of 10

Question 10 of 10

10. Which has lower noise immunity?

TDM & FDM

TDM

FDM

None of the mentioned

Question 10 of 10