Data Communication and Networking – Analog Transmission MCQs

In this section of Data Communication and Networking – Analog Transmission MCQ (Multiple Choice) Based Questions and Answers,it cover the below lists of topic, All the Multiple Choice Question and Answer (MCQs) have been compiled from the books of Data Communication and Networking by The well known author behrouz forouzan.

1. Digital To Analog modulation MCQs.
2. Amplitude shift keying (ASK) MCQs.
3. Frequency shift keying (FSK) MCQs.
4. Phase shift keying (PSK) MCQs.
5. Quadrature amplitude modulation (QAM) MCQs.
6. Analog to analog modulation MCQs
7. Amplitude modulation (AM) MCQs
8. Frequency modulation (FM) MCQs
9. Phase modulation (PM) MCQs

PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE

1. Which of the following is not a digital-to-analog conversion?

• ASK
• PSK
• FSK
• AM

D. AM

2. In ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant.

• ASK
• PSK
• FSK
• QAM

A. ASK

3. In _________, the frequency of the carrier signal is varied to represent data. Both peak amplitude and phase remain constant.

• ASK
• PSK
• FSK
• QAM

C. FSK

4. In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant.

• ASK
• PSK
• FSK
• QAM

B. PSK

5. A constellation diagram shows us the __________ of a signal element, particularly when we are using two carriers (one in-phase and one quadrature).

• amplitude and phase
• amplitude and frequency
• frequency and phase
• none of the above

A. amplitude and phase

6. Quadrature amplitude modulation (QAM) is a combination of ___________

• ASK and FSK
• ASK and PSK
• PSK and FSK
• none of the above

B. ASK and PSK

7. ________ uses two carriers, one in-phase and the other quadrature

• ASK
• PSK
• FSK
• QAM

D. QAM

8. ________ conversion is the representation of analog information by an analog signal.

• Digital-to-analog
• Analog-to-analog
• Analog-to-digital
• Digital-to-digital

B. Analog-to-analog

9. Analog-to-analog conversion is needed if the available bandwidth is _______

• low-pass
• band-pass
• either (a) or (b)
• neither (a) nor (b)

B. band-pass

10. Which of the following is not an analog-to-analog conversion?

• AM
• PM
• FM
• QAM

D. QAM

11. In _____ transmission, the carrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal.

• AM
• PM
• FM
• none of the above

A. AM

12. In _____ transmission, the frequency of the carrier signal is modulated to follow the changing voltage level (amplitude) of the modulating signal. The peak amplitude and phase of the carrier signal remain constant, but as the amplitude of the information signal changes, the frequency of the carrier changes correspondingly.

• AM
• PM
• FM
• none of the above

C. FM

13. In _____ transmission, the phase of the carrier signal is modulated to follow the changing voltage level (amplitude) of the modulating signal.

• AM
• PM
• FM
• none of the above

B. PM

14. In _______, the peak amplitude of one signal level is 0; the other is the same as the amplitude of the carrier frequency

• PSK
• OOK
• FSK
• none of the above

B. OOK

15. How many carrier frequencies are used in BASK?

• 2
• 1
• 0
• none of the above

B. 1

16. How many carrier frequencies are used in BFSK?

• 2
• 1
• 0
• none of the above

A. 2

17. How many carrier frequencies are used in BPSK?

• 2
• 1
• 0
• none of the above

B. 1

18. How many carrier frequencies are used in QPSK?

• 2
• 1
• 0
• none of the above

A. 2

19. The constellation diagram of BASK has ______ dots

• 2
• 1
• 0
• none of the above

A. 2

20. The constellation diagram of BPSK has ______ dots

• 2
• 1
• 0
• none of the above

A. 2

21. ASK, PSK, FSK, and QAM are examples of ________ conversion.

• digital-to-digital
• digital-to-analog
• analog-to-analog
• analog-to-digital

B. digital-to-analog

22. AM and FM are examples of ________ conversion.

• digital-to-digital
• digital-to-analog
• analog-to-analog
• analog-to-digital

C. analog-to-analog

23. In QAM, both ________ of a carrier frequency are varied.

• frequency and amplitude
• phase and frequency
• amplitude and phase
• none of the above

C. amplitude and phase

24. If the baud rate is 400 for a QPSK signal, the bit rate is ________ bps.

• 100
• 400
• 800
• 1600

C. 800

25. If the bit rate for an ASK signal is 1200 bps, the baud rate is ________.

• 300
• 400
• 600
• 1200

D. 1200

26. If the bit rate for an FSK signal is 1200 bps, the baud rate is ________.

• 300
• 400
• 600
• 1200

D. 1200

27. If the bit rate for a 16-QAM signal is 4000 bps, what is the baud rate?

• 300
• 400
• 1000
• 1200

C. 1000

28. If the baud rate for a 64-QAM signal is 2000, what is the bit rate?

• 300
• 400
• 1000
• 12000

D. 12000

29. Given an AM radio signal with a bandwidth of 10 KHz and the highest-frequency component at 705 KHz, what is the frequency of the carrier signal?

• 700 KHz
• 705 KHz
• 710 KHz
• Cannot be determined from given information

A. 700 KHz

30. _______ conversion is the process of changing one of the characteristics of an analog signal based on the information in the digital data.

• Digital-to-analog
• Analog-to-analog
• Analog-to-digital
• Digital-to-digital

A. Digital-to-analog