Digital Arithmetic Operations and Circuits MCQs

Question 1

If [A] = 1011 1010, [B] = 0011 0110, and [C] = [A] • [B], what is [C 4..2] in decimal?

Accepted Answer

4

Answer

1

Answer

2

Answer

3

Question 2

Using 4-bit adders to create a 1See Section 6-bit adder:

Accepted Answer

requires 4 adders and the connection of the carry out of the less significant adder to the carry-in of the next significant adder.

Answer

requires 16 adders.

Answer

requires 16 adders.

Answer

requires the carry-out of the less significant adder to be connected to the carry-in of the next significant adder.

Question 3

When performing subtraction by addition in the 2's-complement system:

Accepted Answer

the minuend is left in its original form and the subtrahend is changed to its 2's-complement.

Answer

the minuend and the subtrahend are both changed to the 2's-complement.

Answer

the minuend is changed to 2's-complement and the subtrahend is left in its original form.

Answer

the minuend and subtrahend are both left in their original form.

Question 4

The two's-complement system is to be used to add the signed numbers 11110010 and 11110011. Determine, in decimal, the sign and value of each number and their sum.

Accepted Answer

–14 and –13, –27

Answer

–113 and –114, 227

Answer

–27 and –13, 40

Answer

–11 and –16, –27

Question 5

When 1100010 is divided by 0101, what is the decimal remainder?

Accepted Answer

3

Answer

2

Answer

4

Answer

6

Question 6

One way to make a four-bit adder perform subtraction is by:

Accepted Answer

inverting the B inputs.

Answer

inverting the output.

Answer

inverting the carry-in.

Answer

grounding the B inputs.

Question 7

What is the most important operation in binary-coded decimal (BCD) arithmetic?

Accepted Answer

addition

Answer

subtraction

Answer

multiplication

Answer

division

Question 8

The range of positive numbers when using an eight-bit two's-complement system is:

Accepted Answer

0 to 127

Answer

0 to 64

Answer

0 to 64

Answer

0 to 256

Question 9

What are the two types of basic adder circuits?

Accepted Answer

half-adder and full-adder

Answer

sum and carry

Answer

asynchronous and synchronous

Answer

one- and two's-complement