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Computer Organization and Architecture · Cache Memory and Hierarchy
Official IIT answer key · IISc Bangalore · Audited Aug 2026
GATE CSE 2024 Set 1 Q54 · NAT · 2 marks
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Topic notes
Memory hierarchy and cache mapping is one of the highest-yield, most quantitative topics in GATE Computer Science, regularly tested through 2-mark NAT and MSQ questions. GATE focuses heavily on bit-level address field decomposition (Tag, Set/Line Index, Block Offset) across direct, set-associative, and fully-associative caches, as well as multi-level hierarchical Average Memory Access Time (AMAT) calculations. Recent years have increased the emphasis on multi-select questions (MSQs) tracing reference sequences for eviction behavior and comparing write-back versus write-through policies.
Full Cache Memory and Hierarchy guide →Consider a 512 GB hard disk with 32 storage surfaces. There are 4096 sectors per track and each sector holds 1024 bytes of data. The number of cylinders in the hard disk is …
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