ITPEC FE Subject A April 2025 Question 13

Virtual Memory Address Translation — convert virtual address to physical using a page table.

Given virtual address 8300:

• •Page size = 4096 bytes (4K)
• •Virtual page = 8300 ÷ 4096 = page 2 (range 8192–12287)
• •Offset = 8300 - 8192 = 108
• •Page table lookup: virtual page 2 (8K–12K) → frame 6
• •Physical base = 6 × 4096 = 24576
• •Physical address = 24576 + 108 = 24684

Why not others:
- (a) 8192 — start of the virtual page, not a physical address
- (b) 8300 — the virtual address itself with no translation
- (c) 24576 — physical frame base without adding the offset

Key rule: physical address = (frame number × page size) + offset within page.

AI-generated — may contain errors