Modulation and Multiplexing MCQ’s

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This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Modulation and Multiplexing”.

1. The information signal is otherwise referred to as ___________
a) Digital signal
b) Analog signal
c) Baseband signal
d) Broadband signal

2. Voice signals cannot be directly transmitted by radio.
a) True
b) False

3. The process of making the signal more compatible with the medium is called as?
a) Modulation
b) Transmission
c) Encrypting
d) Multiplexing

4. In frequency modulation, carrier frequency is always greater than baseband frequency.
a) True
b) False

5. In amplitude modulation, which of the following varies?
a) Frequency of the carrier
b) Frequency of the information signal
c) Amplitude of the carrier wave
d) Amplitude of the information signal

6. What type of multiplexing is used in mobile phones?
a) Frequency division multiplexing
b) Time division multiplexing
c) Code division multiplexing
d) Phase multiplexing

7. Which one of the following is not a type of modulation?
a) Frequency modulation
b) Amplitude Modulation
c) Pulse modulation
d) Phase amplitude modulation

8. You have 5 information signals and only one transmitter. What technique will help in transmitting all the 5 signals?
a) Frequency modulation
b) Multiplexing
c) Amplification
d) Amplitude modulation

9. Which one of the following is not true with respect to amplitude modulation?
a) Less noise
b) Longer range
c) Lower bandwidth
d) Less complex circuits

10. What type of multiplexing is used in serial buses?
a) Time division multiplexing
b) Code division multiplexing
c) Frequency division multiplexing
d) Phase multiplexing

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