Digital Arithmetic Operations and Circuits - General Questions (1)

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Digital Arithmetic Operations and Circuits - General Questions

The binary adder circuit is designed to add ________ binary numbers at the same time.

A.	2
B.	4
C.	6
D.	8

Answer: Option A

Explanation:

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What logic function is the sum output of a half-adder?

A.	AND
B.	exclusive-OR
C.	exclusive-NOR
D.	NAND

Answer: Option B

Explanation:

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Find the 2's complement of –110110².

A.	1101002
B.	1010102
C.	0010012
D.	0010102

Answer: Option D

Explanation:

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Why is a fast-look-ahead carry circuit used in the 7483 4-bit full-adder?

A.	to decrease the cost
B.	to make it smaller
C.	to slow down the circuit
D.	to speed up the circuit

Answer: Option D

Explanation:

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Subtract the following binary numbers.

0101 1000		1010 0011		1101 1110
–0010 0011		–0011 1000		–0101 0111

A.	0011 0100 0110 1010 1000 0110
B.	0011 0101 0110 1011 1000 0111
C.	0011 0101 0110 1010 1000 0111
D.	0011 0101 0110 1010 1000 0110

Answer: Option B

Explanation:

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The BCD addition of 9₁₀ and 7₁₀ will give initial code groups of 1001 + 0111. Addition of these groups generates a carry to the next higher position. The correct solution to this problem would be to:

A.	ignore the lowest order code group because 0000 is a valid code group and prefix the carry with three zeros
B.	add 0110 to both code groups to validate the carry from the lowest order code group
C.	disregard the carry and add 0110 to the lowest order code group
D.	add 0110 to the lowest order code group because a carry was generated and then prefix the carry with three zeros

Answer: Option D

Explanation:

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Solve this binary problem:

mcq6_1018_1

A.	11001001
B.	10010000
C.	01101110
D.	01110110

Answer: Option B

Explanation:

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What is the correct output of the adder in the given figure, with the outputs in the order: mcq6_1011_1

mcq6_1011_2

A.	10111
B.	11101
C.	01101
D.	10011

Answer: Option C

Explanation:

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Digital Arithmetic Operations and Circuits - General Questions (1)

Digital Arithmetic Operations and Circuits - General Questions

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