Virtual Labs

1. What is the primary purpose of the "Kernel Mode" in an operating system?

a: To execute user-level applications Explanation

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b: To display user instructions Explanation

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c: To run system-level tasks and interrupt handlers Explanation

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d: To manage hardware resources Explanation

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2. In a context switch, which of the following is NOT typically saved and restored?

a: Program counter (PC) Explanation

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b: Stack pointer (SP) Explanation

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c: General-purpose registers Explanation

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d: Cache memory Explanation

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3. What is the role of the Process Control Block (PCB) in an operating system?

a: To display user instructions Explanation

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b: To manage hardware resources Explanation

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c: To store details of a process during its execution Explanation

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d: To execute interrupt handlers Explanation

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4. Which component of a CPU is responsible for fetching and decoding instructions?

a: Control unit Explanation

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b: Arithmetic logic unit (ALU) Explanation

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c: Memory Unit Explanation

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d: Input/Output Unit (IOU) Explanation

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5. What is the purpose of a timer interrupt in a multitasking operating system?

a: To synchronize processes Explanation

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b: To initiate a context switch Explanation

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c: To handle user input Explanation

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d: To allocate memory Explanation

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6. Which of the following is NOT typically a part of the Process Control Block (PCB)?

a: Process ID Explanation

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b: Program counter (PC) Explanation

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c: Cache memory Explanation

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d: Register values Explanation

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7. What is the primary purpose of a context switch in an operating system?

a: To save power Explanation

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b: To restart the computer Explanation

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c: To allow multitasking and switch between processes Explanation

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d: To update system documentation Explanation

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Context Switching