Question: Most hardware architectures provide an instruction to return from a interrupt, such as iret. This instruction switches the mode of operation from kernel-mode to user-mode.

Most hardware architectures provide an instruction to return from a interrupt, such as iret. This instruction switches the mode of operation from kernel-mode to user-mode. a) Explain where in the operating system this instruction would be b) Explain what happens if an application program executes this in- used. struction
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