CS601 Midterm MCQs for Papers and Quiz File 3

Q40. One factor in the accuracy of a reconstructed PCM signal is the

1. : Number of bits used for quantization
2. : Signal bandwidth
3. : Carrier frequency
4. : Baud rate

Q41. In PCM, an analog-to-

1. : Analog
2. : Digital
3. : QAM
4. : Differential conversion occurs.

Q42. If the maximum value of a PCM signal is 31 and the minimum value is -31, how many bits were used for coding?

1. :
2. :
3. :
4. :

Q43. Which quantization level results in a more faithful reproduction of the signal?

1. :
2. :
3. :
4. :

Q44. In

transmission, bits are transmitted over a single wire, one at a time.

1. :
2. :
3. : Parallel

Q4. :

1. and

Q45. In

transmission, a start bit and a stop bit frame a character byte.

1. :
2. :
3. : Parallel

Q4. :

1. and

Q46. If a symbol is composed of 3 bits, there are

1. :
2. :
3. :
4. :

Correct option: data levels.

Q47. The Nyquist theorem specifies the minimum sampling rate to be

1. : Twice the bandwidth of a signal
2. : Twice the highest frequency of a signal
3. : Equal to the lowest frequency of a signal
4. : Equal to the highest frequency of a signal

Q48. Pulse rate is always

1. : Less than
2. : Less than or equal to
3. : Greater than the bit rate.
4. : Greater than or equal to

Q49. ASK, PSK, FSK, and QAM are examples of

1. :
2. :
3. :
4. :

Q50. In QAM, both

of a carrier frequency are varied.

1. : frequency and amplitude
2. : phase and frequency
3. :
4. :

Q51. If the baud rate is 400 for a QPSK signal, the bit rate is

1. :
2. :
3. :
4. : 1600

Correct option: bps.

Q52. If the bit rate for an ASK signal is 1200 bps, the baud rate is

1. :
2. :
3. :
4. : 1200

Q53. If the bit rate for an FSK signal is 1200 bps, the baud rate is

1. :
2. :
3. :
4. : 1200

Q54. If the bit rate for a 16-QAM signal is 4000 bps, what is the baud rate?

1. :
2. :
3. : 1000
4. : 1200

Q55. If the baud rate for a 64-QAM signal is 2000, what is the bit rate?

1. :
2. :
3. : 1000
4. : 12000

Q56. Quadrature amplitude modulation (QAM) is a combination of

1. : ASK and FSK
2. : ASK and PSK
3. : PSK and FSK