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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
Which of the following statements are TRUE about Privileged Instructions?
(A) It can only be executed by the Operating System kernel and not by user applications.
(B) It is designed to perform operations that can directly affect the hardware or system state such as I/O operations or changing memory management setting.
(C) User applications can execute privileged instructions if they have correct permissions, set by the Operating System.
(D) It is usually executed in user mode to ensure the safety and security of the system.
Choose the correct answer from the options given below :
Solution
(A) True
Privileged instructions run in kernel mode
(B) True
Used for hardware control, I/O, memory management
(C) False
User programs cannot execute privileged instructions
(D) False
Executed in kernel mode, not user mode
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