Digital Arithmetic Operations and Circuits - General Questions (2)

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Digital Arithmetic Operations and Circuits - General Questions

Subtract the following hexadecimal numbers.

47		34		FA
–25		–1C		–2F

A.	22 18 CB
B.	22 17 CB
C.	22 19 CB
D.	22 18 CC

Answer: Option A

Explanation:

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10.

The summing outputs of a half- or full-adder are designated by which Greek symbol?

A.	omega
B.	theta
C.	lambda
D.	sigma

Answer: Option D

Explanation:

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11.

What is the difference between a full-adder and a half-adder?

A.	Half-adder has a carry-in.
B.	Full-adder has a carry-in.
C.	Half-adder does not have a carry-out.
D.	Full-adder does not have a carry-out.

Answer: Option C

Explanation:

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12.

The carry propagation delay in full-adder circuits:

A.	is normally not a consideration because the delays are usually in the nanosecond range.
B.	decreases in a direct ratio to the total number of FA stages.
C.	is cumulative for each stage and limits the speed at which arithmetic operations are performed.
D.	increases in a direct ratio to the total number of FA stages but is not a factor in limiting the speed of arithmetic operations.

Answer: Option C

Explanation:

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13.

Add the following binary numbers.

0010 0110		0011 1011		0011 1100
+0101 0101		+0001 1110		+0001 1111

A.	0111 1011 0100 0001 0101 1011
B.	0111 1011 0101 1001 0101 1011
C.	0111 0111 0101 1001 0101 1011
D.	0111 0111 0100 0001 0101 1011

Answer: Option B

Explanation:

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14.

Convert each of the decimal numbers to two's-complement form and perform the addition in binary.

+13		–10
add –7		add +15

A.	0001 0100 0000 0101
B.	0000 0110 0001 1001
C.	0000 0110 0000 0101
D.	1111 0110 1111 0101

Answer: Option C

Explanation:

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15.

Which of the following is the primary advantage of using binary-coded decimal (BCD) instead of straight binary coding?

A.	Fewer bits are required to represent a decimal number with the BCD code.
B.	BCD codes are easily converted from decimal.
C.	the relative ease of converting to and from decimal
D.	BCD codes are easily converted to straight binary codes.

Answer: Option C

Explanation:

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16.

Binary subtraction of a decimal 15 from 43 will utilize which two's complement?

A.	101011
B.	110000
C.	011100
D.	110001

Answer: Option D

Explanation:

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Digital Arithmetic Operations and Circuits - General Questions (2)

Digital Arithmetic Operations and Circuits - General Questions

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