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

Central Processing unit is responsible for processing the data and instructions. It has the following sub-components:

1. Arithmetic and Logic Unit (ALU) — It is responsible for carrying out the arithmetic instructions (add, subtract, multiply, divide) and making logic decisions (greater than, less than, equal to).
2. Control Unit — The control unit controls and guides the interpretation, flow and manipulation of all data and information. It acts as a supervisor by controlling and guiding the operation taking place.
3. Registers — The CPU uses these small units of data holding places to temporarily hold some important processing-information during the time the processing is taking place.