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Question

The ALU of a computer responds to the commands coming from __________.

A
Primary memory
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B
Control section
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C
External memory
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D
Cache memory
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E
None of the above
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Solution

The correct option is B Control section

The ALU of a computer responds to the commands coming from Control section.

It tells the computer's memory, arithmetic/logic unit and input and output devices how to respond to the instructions that have been sent to the processor. It directs the operation of the other units by providing timing and control signals. Most computer resources are managed by the CU.

ALU is the Arithmetic and Logic Unit which performs all the arithmetic and logical operations such as addition, subtraction, logical AND, OR etc. CU is the Control Unit. It decodes the instructions, and controls all the other internal components of the CPU to make it work.

A control unit or CU is circuitry that directs operations within a computer's processor. A control unit works by receiving input information that it converts into control signals, which are then sent to the central processor. The computer's processor then tells the attached hardware what operations to carry out.


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