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Question

The unit of a computer system that executes program, communicates with and often controls the operation of other subsystems of the computer is known as __________.
  1. CPU
  2. Control Unit
  3. I/O unit
  4. Peripheral unit
  5. None of the above

A
Control Unit
B
Peripheral unit
C
CPU
D
I/O unit
E
None of the above
Solution
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The unit of a computer system that executes program, communicates with and often controls the operation of other subsystems of the computer is known as CPU.

The computer does its primary work in a part of the machine we cannot see, a control center that converts data input to information output. This control center, called the central processing unit (CPU), is a highly complex, extensive set of electronic circuitry that executes stored program instructions.

A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions. The computer industry has used the term "central processing unit" at least since the early 1960s. Traditionally, the term "CPU" refers to a processor, more specifically to its processing unit and control unit (CU), distinguishing these core elements of a computer from external components such as main memory and I/O circuitry.

The Control Unit is an internal part of a CPU that co-ordinates the instructions and data flow between CPU and other components of the computer. It is the CU that directs the operations of a central processing unit by sending timing and control signals.

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