• The central processing unit's control unit regulates and unifies the computer's activities. It picks and retrieves instructions from the main memory in the correct order, then interprets them to activate the system's other functional units at the appropriate time to accomplish their tasks.
• All input data is transferred to the arithmetic-logic unit via the main memory for processing, which includes the four basic arithmetic functions (addition, subtraction, multiplication, and division) as well as certain logic operations like data comparison and the selection of the desired problem-solving procedure or viable alternative based on predetermined decision criteria.

Read More: What are the different internal parts of a CPU and their functions?