Digital Electronics - Digital Arithmetic Operations and Circuits

Exercise :: Digital Arithmetic Operations and Circuits - Filling the Blanks

1. 

In VHDL, the architecture declaration always begins with the ________ of variable signals or components that will be used in the concurrent description between BEGIN and END.

A. type
B. vectors
C. functions
D. declarations

Answer: Option D

Explanation:

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2. 

When decimal numbers with several digits are to be added together using BCD adders ________.

A. a separated BCD adder is required for each digit position
B. the BCD adders must have the carry-outs grounded
C. the BCD's must be grouped in twos
D. full adders are also used

Answer: Option A

Explanation:

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3. 

The binary adder circuit is designed to add ________ binary number(s) at a time.

A. 1
B. 3
C. 2
D. 5

Answer: Option C

Explanation:

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4. 

The 74HC382 ALU can perform ________ operations.

A. 2
B. 4
C. 8
D. 16

Answer: Option C

Explanation:

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5. 

Subtraction of the 2's-complement system actually involves the operation of ________.

A. multiplication
B. subtraction
C. addition
D. division

Answer: Option C

Explanation:

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