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MCQ

Q.

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

A

low-pass

B

band-pass

C

either (a) or (b)

D

neither (a) nor (b)

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MCQ

1.

. In _________ transmission, we send bits one after another without start or stop bits or gaps. It is the responsibility of the receiver to group the bits.

A

synchronous

B

asynchronous

C

isochronous

D

none of the above

Discussion

MCQ

2.

Quadrature amplitude modulation (QAM) is a combination of ___________

A

ASK and FSK

B

ASK and PSK

C

PSK and FSK

D

none of the above

Discussion

MCQ

3.

How many carrier frequencies are used in BPSK?

A

2

B

1

D

none of the above

Discussion

MCQ

4.

In a _____ scheme, all the signal levels are on one side of the time axis, either above or below.

A

polar

B

bipolar

C

unipolar

D

all of the above

Discussion

MCQ

5.

If the frequency spectrum of a signal has a bandwidth of 500 Hz with the highest frequency at 600 Hz, what should be the sampling rate, according to the Nyquist theorem?

A

200 samples/s

B

500 samples/s

C

1000 samples/s

D

1200 samples/s

Discussion

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