Digital Arithmetic Operations and Circuits MCQs

Question 1

Solve this binary problem: 01000110 ÷ 00001010 =

Accepted Answer

0111

Answer

10011

Answer

1001

Answer

0011

Question 2

Convert the decimal numbers 275 and 965 to binary-coded decimal (BCD) and add. Select the BCD code groups that reflect the final answer.

Accepted Answer

0001 0010 0100 0000

Answer

1101 1110 1010

Answer

1110 1010 1110

Answer

0010 0011 0100 0000

Question 3

When multiplying 13 × 11 in binary, what is the third partial product?

Accepted Answer

00000000

Answer

1011

Answer

100000

Answer

100001

Question 4

How many BCD adders would be required to add the numbers 97310 + 3910?

Accepted Answer

3

Answer

4

Answer

5

Answer

6

Question 5

The selector inputs to an arithmetic/logic unit (ALU) determine the:

Accepted Answer

arithmetic or logic function

Answer

selection of the IC

Answer

data word selection

Answer

clock frequency to be used

Question 6

An 8-bit register may provide storage for two's-complement codes within which decimal range?

Accepted Answer

–128 to +127

Answer

+128 to –128

Answer

+128 to –127

Answer

+127 to –127

Question 7

The carry propagation delay in 4-bit full-adder circuits:

Accepted Answer

is cumulative for each stage and limits the speed at which arithmetic operations are performed

Answer

is normally not a consideration because the delays are usually in the nanosecond range

Answer

decreases in direct ratio to the total number of full-adder stages

Answer

increases in direct ratio to the total number of full-adder stages, but is not a factor in limiting the speed of arithmetic operations

Question 8

In VHDL, what is a GENERATE statement?

Accepted Answer

A way to tell the compiler to replicate several components

Answer

The start statement of a program

Answer

Not used in VHDL or ADHL

Answer

A way to get the computer to generate a program from a circuit diagram

Question 9

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

Accepted Answer

the relative ease of converting to and from decimal

Answer

Fewer bits are required to represent a decimal number with the BCD code.

Answer

BCD codes are easily converted from decimal.

Answer

BCD codes are easily converted to straight binary codes.