Computer Science test

What is an arithmetic and Logic unit?

• An Arithmetic and Logic Unit (ALU) is a component of a CPU that performs arithmetic and logical operations.
• A part of the CPU responsible for memory management.
• A component that stores data temporarily.
• A unit that only performs arithmetic operations.

What is the job of the arithmetic unit in the ALU?

• To store data temporarily for processing.
• To manage input and output operations.
• To perform basic arithmetic operations on binary numbers.
• To control the flow of data between memory and CPU.

In binary, what does 1 represent?

• On

• 10

• None

• Off

What does 0 represent in binary?

• Yes

• ON

• No

• Off

What causes an overflow in an ALU?

• An overflow happens when the ALU is not properly calibrated.
• An overflow is caused by logical operations only.
• An overflow is caused by arithmetic operations producing results outside the representable range of the ALU's data type.
• An overflow occurs when the ALU is powered off.

What is a carry-look-ahead adder?

• A carry-look-ahead adder is a type of memory storage device.
• A carry-look-ahead adder is a slow adder that processes carry bits in order.

• A carry-look-ahead adder is used for converting decimal numbers to binary.
• A carry-look-ahead adder is a fast adder that calculates carry bits before the first calculation is finished.

Identify the output on the XOR table.

Tell me the name of the two gates in the diagram. Then tell me what A, B, S, and C stand for.

a

b

c

d

e

f

XOR

OR

Carry

Input B

Sum

NOT

Create

Input A

AND

Search

What does RAM stand for?

(a)  

What does CPU stand for?

(a)