Digital Communications Mock Test 3

10%

Question 1 of 10

1. Which waveform type has the feature of clocking?

Delay modulation

NRZ-L

Bbi-p-M

Manchester coding

Question 1 of 10

Question 2 of 10

2. What is symbol rate packing?

Maximum possible symbol transmission rate

Maximum possible symbol receiving rate

Maximum ISI value allowed

Maximum bandwidth

Question 2 of 10

Question 3 of 10

3. Pseudo noise signal has _______ and _______ SNR for the same peak transmitted power.

Smaller, smaller

Larger, smaller

Smaller, larger

Larger, larger

Question 3 of 10

Question 4 of 10

4. The filters used with the equalizer is of ______ types.

Feed forward and feedback

Feed backward

None of the mentioned

Feed forward

Question 4 of 10

Question 5 of 10

5. Decreasing the data rate is called as

Down sampling

Up sampling

None of the mentioned

Aliasing

Question 5 of 10

Question 6 of 10

6. To avoid aliasing

Reduce the bandwidth

Reduce the bandwidth & Cut out high frequency

Cut out high frequency

None of the mentioned

Question 6 of 10

Question 7 of 10

7. If the filter’s tap weight remains fixed during transmission of data, then the equalization is called as

Adaptive equalization

None of the mentioned

Preset equalization

Fixed equalization

Question 7 of 10

Question 8 of 10

8. Equalization process includes

Maximum likelihood sequence estimation

None of the mentioned

Maximum likelihood sequence estimation & Equalization with filters

Equalization with filters

Question 8 of 10

Question 9 of 10

9. In which mixing is easier?

Digital signal

Analog signal

Analog & Digital signal

None of the mentioned

Question 9 of 10

Question 10 of 10

10. Some of the M-ary waveforms are

PPM

PAM

All of the mentioned

PDM

Question 10 of 10