# Frequency Hopping MCQ [Free PDF] – Objective Question Answer for Frequency Hopping Quiz

1. DS/BPSK includes

B. Demodulation
D. None of the mentioned

DS/BPSK is a two-step process that includes despreading and demodulation.

2. In the direct sequence process which step is performed first?

B. Demodulation
D. None of the mentioned

In the direct sequence process, the De-spreading correlator is followed by a modulator.

3. The processing gain is given as

A. Wss/R
B. R/Wss
C. Wss/2R
D. R/2Wss

The processing gain is given by the ratio of the minimum bandwidth of the data to the data rate.

4. Chip is defined as

A. Shortest uninterrupted waveform
B. Largest uninterrupted waveform
C. Shortest diversion
D. None of the mentioned

A chip is defined as the shortest uninterrupted waveform in the system.

5. Processing gain is given as

A. Wss/R
B. Rch/R
C. Wss/R & Rch/R
D. None of the mentioned

Processing gain is given both as the ratio of the minimum bandwidth of the data to data rate and also by the ratio of code chip rate and data rate as minimum bandwidth is approximately equal to code chip rate.

6. Which modulation scheme is preferred for the direct sequence spread spectrum process?

A. BPSK
B. QPSK
C. BPSK & QPSK
D. None of the mentioned

Both the modulation scheme BPSK and QPSK can be used for the direct sequence spread spectrum process.

7. The frequency hopping system uses a ______ modulation scheme.

A. FSK
B. BPSK
C. MFSK
D. MPSK

The frequency-hopping spread spectrum system uses an M-ary frequency-shift keying modulation scheme.

8. The minimum spacing between consecutive hop positions gives the

A. Minimum number of chips necessary
B. Maximum number of chips necessary
C. Chip rate
D. None of the mentioned

The minimum spacing between consecutive hop positions gives the minimum number of chips necessary in the frequency word.

9. Which system allows larger processing gain?

A. Direct sequence
B. Frequency hopping
C. Direct sequence & Frequency hopping
D. None of the mentioned

The frequency-hopping spread spectrum system allows greater processing gain than the direct sequence spread spectrum technique.

10. In which technique is phase coherence hard to maintain?

A. Direct sequence
B. Frequency hopping
C. Direct sequence & Frequency hopping
D. None of the mentioned