ITPEC FE Morning October 2018 Question 20
ITPEC FE Morning October 2018 — Question 20 of 80
Page Fault Causes — what increases page fault occurrences in virtual memory.
A page fault occurs when a process accesses a page that does not exist in main memory (it must be loaded from disk).
Answer: (b) — An increase in access to a page that does not exist in main memory.
More accesses to pages not in RAM → more page faults → more disk I/O → slower performance.
Why not others:
- (a) Accessing a page not used for a long time — if it's still in memory, no fault occurs
- (c) More access to pages already in memory — this reduces page fault ratio
- (d) More updated pages in memory — relates to dirty pages and write-back, not page faults
Key rule: Page fault = requested page is NOT in main memory → OS must fetch it from disk.
AI-generated — may contain errors
The original exam layout is preserved in the image so diagrams, formulas, tables, and code remain accurate.
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official FE past-paper collection or Report an issue.