Digital Concepts - General Questions (9)

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Digital Concepts - General Questions

65.

What is an analog-to-digital converter?

A.	It makes digital signals.
B.	It takes analog signals and puts them in digital format.
C.	It allows the use of digital signals in everyday life.
D.	It stores information on a CD.

Answer: Option B

Explanation:

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66.

The rise time is the time it takes a pulse to go from ________.

A.	the base line to the maximum HIGH voltage
B.	10% of the pulse amplitude to the maximum HIGH voltage
C.	the base line to 90% of the pulse amplitude
D.	10% of the pulse amplitude to 90% of the pulse amplitude

Answer: Option D

Explanation:

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67.

Give the decimal value of binary 10000110.

A.	13410
B.	14410
C.	11010
D.	12610

Answer: Option A

Explanation:

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68.

A pulse has a period of 15 ms. Its frequency is ________.

A.	6.66 Hz
B.	66.66 Hz
C.	666.66 Hz
D.	15 Hz

Answer: Option B

Explanation:

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69.

Which format requires fewer conductors?

A.	Parallel
B.	Serial
C.	Both are the same
D.	Cannot tell

Answer: Option B

Explanation:

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70.

What is one relative disadvantage of serial transfer?

A.	It requires too many conductors.
B.	Its interconnect system is complex.
C.	It is slow.
D.	It can only be used over very short distances.

Answer: Option C

Explanation:

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71.

Convert the fractional decimal number 6.75 to binary.

A.	0111.1100
B.	0110.1010
C.	0110.1100
D.	0110.0110

Answer: Option C

Explanation:

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72.

The parallel transmission of digital data:

A.	is much slower than the serial transmission of data.
B.	requires only one signal line between sender and receiver.
C.	requires as many signal lines between sender and receiver as there are data bits.
D.	is less expensive than the serial method of data transmission.

Answer: Option C

Explanation:

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