Explain where in operating system the instruction would used

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Reference no: EM131476189

Question: A typical hardware architecture provides an instruction called return from interrupt, abbreviated by something like iret. This instruction switches the mode of operation from kernel-mode to user-mode. This instruction is usually only available while the machine is running in kernel-mode.

a. Explain where in the operating system this instruction would be used.

b. Explain what happens if an application program executes this instruction.

Reference no: EM131476189

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