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A, special, high-speed storage area within the CPU. All data must be represented in a register before it can be processed. For example, if two numbers are to be multiplied, both numbers must be in registers, and the result is also placed in a register. (The register can contain the address of a memory location where data is stored rather than the actual data itself.)

The number of registers that a CPU has and the size of each (number of bits) help determine the power and speed of a CPU. For example a 32-bit CPU is one in which each register is 32 bits wide. Therefore, each CPU instruction can manipulate 32 bits of data.

Usually, the movement of data in and out of registers is completely transparent to users, and even to programmers. Only assembly language programs can manipulate registers. In high-level languages, the compiler is responsible for translating high-level operations into low-level operations that access registers.

<ANSWERED BY:-SONU BARNWAL, CENTRAL UNIVERSITY OF BIHAR>

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6y ago

A register is a set of wires in a CPU on which a pattern of binary can be held, a set of data holding places, A register may hold an instruction, a storage address, or any kind of data. A CPU will have a small set of registers.

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Small high-speed storage in the CPU

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Q: What is a register in operating system?
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