Question

What are the different parts of the CPU and Explain?

Topic	ICT Skills
Type	Long answer
Class	10

Answer 1

A computer is made up of multiple parts that work together to perform the processing and effective functioning of the computer.

The CPU performs all the basic arithmetic and logical operations of the computer.

There are three main components of a CPU (Central Processing Unit) 

• Arithmetic and Logic Unit (ALU)
• Control Unit (CU)
• Memory Unit (MU

1. Arithmetic and Logic Unit (ALU)- Arithmetic and logical unit performs all arithmetic and logical operations. for example subtraction, addition, division and multiplication.
2. Control Unit (CU)- Control Unit instructs the computer system to perform a particular task. It takes instructions from memory and executes them.
3. Memory Unit (MU)- Memory Unit used to store data or instructions. there are two type of memory unit.

a) Primary Memory- Primary memory is also known as main memory. This memory is directly accessed by the microprocessor. Primary memory have two type RAM and ROM.

• RAM- RAM stands for Random access memory it is short term memory, RAM is also known as Volatile memory and it stores data temporarily.
• ROM- ROM stands for Read only memory it is long term memory, ROM stores the data permanently.

b) Secondary Memory- The device which is used to store data permanently with the help of external devices is known as Secondary memory. Example – Hard Disk, Flash drive, External drive etc.

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