Question

What is the purpose of privileged/nonprivileged execution modes in CPUs?

a.

To isolate the operating system kernel from programs.

b.

To allow unrestricted access to currently running code.

c.

To prevent users from installing any kind of hardware device on the system.

d.

To prevent crackers from installing a kernel-level debugger such as SoftICE.

Posted under Reverse Engineering

Answer: (a).To isolate the operating system kernel from programs. Explanation:The purpose of privileged/nonprivileged execution modes in CPUs is to isolate the operating system kernel from programs.

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