Operating Systems · Memory Management and Virtual Memory
Official IIT answer key · IIT Kanpur · Audited Aug 2026
GATE CSE 2015 Set 1 Q47 · MCQ · 2 marks
Key concept
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Topic notes
Memory management and virtual memory is a high-yield, computation-heavy topic in GATE CS, frequently carrying 2-mark NAT and MCQ/MSQ questions. The exam heavily emphasizes multi-level page table sizing, hierarchical bit-splitting, page replacement algorithm simulation (FIFO, LRU, OPTIMAL, MRU, LIFO), and Effective Memory Access Time (EMAT) calculations involving TLBs and disk transfers. Recent years have introduced variants such as bounded lookahead optimal replacement, code-based loop/array access patterns, and TLB reach sizing.
Full Memory Management and Virtual Memory guide →Consider a main memory with five page frames and the following sequence of page references: 3, 8, 2, 3, 9, 1, 6, 3, 8, 9, 3, 6, 2, 1, 3. Which one of the following is true with respect to page replacement policies First In First Out (FIFO) and Least Recently Used (LRU)?
Topic-wise GATE CS PYQs with verified steps
Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.
