Modulation And Demodulation -Multiple Choice Questions Quiz

Question 1: What is modulation in communication?

(a) The process of encoding digital data into analog signals
(b) The process of encoding analog signals into digital data
(c) The process of encoding multiple signals into a single signal
(d) The process of encoding voice signals into video signals

Question 2: Which type of modulation is used for traditional analog AM radio broadcasting?

(a) Amplitude Modulation (AM)
(b) Frequency Modulation (FM)
(c) Phase Modulation (PM)
(d) Pulse Code Modulation (PCM)

Question 3: Which type of modulation is less susceptible to noise and interference, making it suitable for high-fidelity music broadcasting?

(a) Amplitude Modulation (AM)
(b) Frequency Modulation (FM)
(c) Phase Modulation (PM)
(d) Pulse Code Modulation (PCM)

Question 4: What is the purpose of modulation in wireless communication?

(a) To improve the security of the transmitted data
(b) To increase the transmission range of the signal
(c) To convert analog signals to digital signals
(d) To allow multiple signals to share the same channel

Question 5: In frequency modulation, what parameter is varied to carry the information?

(a) Amplitude of the carrier signal
(b) Frequency of the carrier signal
(c) Phase of the carrier signal
(d) Wavelength of the carrier signal

Question 6: Which type of modulation is commonly used for transmitting digital data over telephone lines?

(a) Amplitude Modulation (AM)
(b) Frequency Modulation (FM)
(c) Phase Shift Keying (PSK)
(d) Pulse Width Modulation (PWM)

Question 7: What is demodulation in communication?

(a) The process of encoding analog signals into digital data
(b) The process of decoding digital data from analog signals
(c) The process of converting digital signals into analog signals
(d) The process of encrypting transmitted data

Question 8: Which type of modulation is commonly used for broadcasting FM radio signals?

(a) Amplitude Modulation (AM)
(b) Frequency Modulation (FM)
(c) Phase Modulation (PM)
(d) Pulse Code Modulation (PCM)

Question 9: Which type of modulation is used for transmitting digital information through optical fibers in telecommunications?

(a) Amplitude Modulation (AM)
(b) Frequency Modulation (FM)
(c) Phase Shift Keying (PSK)
(d) Pulse Amplitude Modulation (PAM)

Question 10: In amplitude modulation, what parameter is varied to carry the information?

(a) Amplitude of the carrier signal
(b) Frequency of the carrier signal
(c) Phase of the carrier signal
(d) Wavelength of the carrier signal

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Total score: /10

Answer key:

Question 1: a

Question 2: a

Question 3: b

Question 4: d

Question 5: b

Question 6: c

Question 7: b

Question 8: b

Question 9: d

Question 10: a