Which of the following best represents the pattern used by operating systems to protect kernel memory during system calls?

easy🔍 Pattern Recognition Q2 of Q15

Operating Systems - System Call - Mechanism & Modes (User vs Kernel)

AKernel mode runs with higher privilege levels, isolating kernel memory from user mode access.

BUser mode processes have direct read/write access to kernel memory but limited execution rights.

CKernel memory is duplicated for each user process to prevent unauthorized access.

DUser mode processes switch to a special sandbox mode to access kernel memory safely.

Step-by-Step Solution

Solution:

Step 1: Recall privilege levels
Kernel mode runs at a higher privilege level, preventing user mode processes from accessing kernel memory directly.
Final Answer:
Option A -> Option A
Quick Check:
Kernel memory is protected by privilege levels, not duplication or sandboxing. [OK]

Quick Trick: Kernel mode has higher privileges isolating kernel memory [OK]

Common Mistakes:

MISTAKES

Trap Explanation:

PITFALL

Candidates often confuse memory protection with duplication or sandboxing rather than privilege levels.

Interviewer Note:

CONTEXT

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