Data and Signals Questions

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1.

Before data can be transmitted, they must be transformed to ________.

A

periodic signals

B

electromagnetic signals

C

aperiodic signals

D

low-frequency sine waves

Correct Answer: B

None.

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2.

A periodic signal completes one cycle in 0.001 s. What is the frequency?

A

1 Hz

B

100 Hz

C

1 KHz

D

1 MHz

Correct Answer: C

None.

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3.

In a frequency-domain plot, the horizontal axis measures the ________.

A

peak amplitude

B

frequency

C

phase

D

slope

Correct Answer: B

None.

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4.

In a time-domain plot, the horizontal axis is a measure of ________.

A

signal amplitude

B

frequency

C

phase

D

time

Correct Answer: D

None.

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5.

If the bandwidth of a signal is 5 KHz and the lowest frequency is 52 KHz, what is the highest frequency?

A

5 KHz

B

10 KHz

C

47 KHz

D

57 KHz

Correct Answer: D

None.

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6.

What is the bandwidth of a signal that ranges from 1 MHz to 4 MHz?

A

4 MHz

B

1 KHz

C

3 MHz

D

none of the above

Correct Answer: C

None.

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7.

As frequency increases, the period ________.

A

decreases

B

increases

C

remains the same

D

doubles

Correct Answer: A

None.

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8.

Given two sine waves A and B, if the frequency of A is twice that of B, then the period of B is ________ that of A.

A

one-half

B

twice

C

the same as

D

indeterminate from

Correct Answer: B

None.

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9.

A sine wave is ________.

A

periodic and continuous

B

aperiodic and continuous

C

periodic and discrete

D

aperiodic and discrete

Correct Answer: A

None.

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10.

. If the maximum amplitude of a sine wave is 2 V, the minimum amplitude is ________ V.

A

2

B

1

C

-2

D

between -2 and 2

Correct Answer: C

None.

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