Operating Systems - TLB - Translation Lookaside Buffer & Effective Access Time
Which of the following statements about TLB and page table interaction contains a subtle misconception?
Which of the following statements about TLB and page table interaction contains a subtle misconception?
medium🐞 Bug Identification Q7 of Q15
Step-by-Step Solution
Solution:
Step 1: Analyze each statement
A: Correct -- page table is stored in main memory and accessed on TLB misses.
B: Correct -- TLB miss triggers page table lookup.
C: Incorrect -- TLB contains only a small subset of page table entries, not a complete copy.
D: Correct -- TLB is hardware cache for translations.Step 2: Identify misconception
Only statement C incorrectly claims TLB holds entire page table.Final Answer:
Option B -> Option BQuick Check:
TLB caches subset, not full page table [OK]
Quick Trick: TLB caches subset, not entire page table [OK]
Common Mistakes:
MISTAKES- Believing TLB holds full page table
- Confusing TLB with page table storage
- Ignoring hardware nature of TLB
Trap Explanation:
PITFALL- Candidates often overestimate TLB capacity and think it duplicates page table.
Interviewer Note:
CONTEXT- Reveals candidate's precise understanding of TLB vs page table roles.
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