Digital Electronics - Digital Arithmetic Operations and Circuits

Exercise :: Digital Arithmetic Operations and Circuits - General Questions

71. 

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:

No answer description available for this question. Let us discuss.

72. 

Find the 2's complement of –1101102.

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

Answer: Option D

Explanation:

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73. 

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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74. 

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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