## Arithmetic Logic Unit (ALU)

Q12. Define Arithmetic Logic Unit (ALU).

Ans. A digital circuit used in computers to perform arithmetic and logic operations.

## Function of ALU

Q5. What is the function of ALU?

Ans. Arithmetic Logic Unit (ALU) carries out arithmetic and logical operations.

## Components of CPU and its role with function of Control Unit of CPU

Q3. What are the components of CPU? What is its role? What is the function of control unit of CPU?

Ans. The CPU is the control centre for a computer. It guides, directs and governs its performance. It is the brain of the computer. The CPU has two components which are responsible for different functions. These two components are its Control Unit (CU) and Arithmetic Logic Unit (ALU).

Arithmetic Logic Unit (ALU) carries out arithmetic and logical operations.

Control Unit (CU) controls and guides the interpretation, flow and manipulation of all data and information. Another important function of CU is the program execution that is, carrying out all the instructions stored in the program.

## ALU.

Q6. Define ALU.

Ans. Arithmetic Logic Unit that carries out arithmetic and logical operations.

## Functions of CPU

Q6. What is the function of CPU in a computer system? What are its subunits?

Ans. The CPU is the control centre for a computer. It guides, directs and governs its performance. It is the brain of the computer. The CPU has two components which are responsible for different functions. These two components are its Control Unit (CU) and Arithmetic Logic Unit (ALU).

## Basic Units Of Computer, Subunits That Make Up The CPU, And Function Of Units.

Q2. State the basic units of the computer. Name the subunits that make up the CPU, and give the function of each of the units.

Ans. The basic units of a computer are:

1. Input Unit
2. Central Processing Unit (CPU)
3. Output Unit
4. Memory

The CPU has two subunits: the control unit (CU) and the arithmetic logic unit (ALU).

The control unit controls the entire operation being carried out.

The ALU performs the arithmetic and logical operations.