Free ALU 101 Arithmetic Operations Questions and Answers

Question 1

Which operation is typically used by an ALU to perform subtraction?

Accepted Answer

Two's complement addition

Answer

Addition

Answer

Bitwise AND

Answer

Bitwise OR

Question 2

What is the result of adding two 4-bit binary numbers, 1011 and 0110?

Accepted Answer

10001

Answer

10

Answer

1101

Answer

10101

Question 3

How does an ALU handle an overflow in an unsigned binary addition?

Accepted Answer

Uses a carry-out flag

Answer

Ignores it

Answer

Uses an overflow flag

Answer

Resets the result to zero

Question 4

Which ALU operation would you use to multiply two numbers?

Accepted Answer

Shift and add method

Answer

Repeated addition

Answer

Bitwise XOR

Answer

Division

Question 5

What is the result of the ALU operation for 8-bit binary numbers 11111111 (255) + 00000001 (1)?

Accepted Answer

00000000

Answer

11111111

Answer

00000001

Answer

100000000