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# CO-Grand Test -Q1

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+1 vote

A privileged instruction may be executed only while the hardware is in kernel mode. Which of the following is LEAST likely to be a privileged instruction?

(A)$.$ An instruction that changes the value of the program counter

(B)$.$ An instruction that sends output to a printer

(C)$.$ An instruction that modifies a memory management register

(D)$.$ An instruction that halts the CPU