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What is an instruction set architecture​

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In computer science, an instruction set architecture (ISA) is an abstract model of a computer. It is also referred to as architecture or computer architecture. A realization of an ISA, such as a central processing unit (CPU), is called an implementation.
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Answer:

Instruction set architecture is the abstract model of a computer and is the part of the processor that is visible to the programmer or compiler writer

Step-by-step explanation:

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