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  Components of CPU

Introduction to Components of CPU:

There are three major components of the CPU that are as follow:

1. Arithmetic-logic unit (ALU),

2. Control unit (CU)

3. On-board cache memory.

1. CONTROL UNIT:

The control unit (CU) is accountable for loading and interpreting the individual instructions which include the computer program. That is in a language termed machine code. It is a pattern of zeros and ones. The control unit as well has the task of acquiring the data required through the instructions and returning the results of the processing later than the instruction has been executed.

2. ARITHMETIC-LOGIC UNIT:

The ALU (Arithmetic-Logic Unit) is responsible for performing arithmetic operations like addition and subtraction also logical decisions like whether one number is bigger than other. Every program contains complex sets of logical and arithmetic operations. Other way of thinking of a logical operation is like a decision making operation.

3. ON-BOARD CACHE MEMORY:

Since the CPU (central processing unit) can carry out its operations much faster than data can be transferred from RAM, several CPUs contain on-board cache memory. This is memory which the control unit may access extremely fast and use for intermediate storage. Additional, data and instructions can be loaded into cache before they are really required. While they are required, the transfer is very much faster than it would have been if RAM had been employed.

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