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The HALT instruction is a privileged instruction that can be only used by

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The HALT instruction is a privileged instruction that can be only used by

(a) execution unit

(b) operating system

(c) control unit

(d) memory unit

I got this question in an online interview.

This is a very interesting question from Hyperthreading In Pentium in section Pentium 4 processor of Microprocessor

1 Answer

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by (49.2k points)
Right answer is (b) operating system

The best explanation: The HALT instruction is a privileged instruction that can be only used by operating system.

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