GateQA — Free GATE CS Previous Year Questions & Mock Tests

GateQA is a free GATE CS preparation platform with 3,500+ previous-year questions (1987–2026), 36,000+ aptitude questions, full-length year-wise mock tests, a built-in GATE calculator, performance analytics, and full offline support.

Practice questions from Operating Systems, Algorithms, DBMS, Computer Networks, Theory of Computation, Discrete Mathematics, Compiler Design, Digital Logic, Computer Organization, Software Engineering, and Engineering Mathematics.

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GateQA — Free GATE CS Preparation Platform

GateQA is a free GATE CS preparation platform featuring 3,500+ previous-year questions (1987–2026), 36,000+ aptitude questions, subject-wise and year-wise mock tests, performance analytics, and full offline support. Practice Operating Systems, Algorithms, DBMS, Computer Networks, Theory of Computation, Discrete Mathematics, Compiler Design, Digital Logic, and more.

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Operating System

GATE CSE 2014 Set 3 | Question: 20

Subject: Operating System
Paper: 2014 Set 3
A system uses $3$ page frames for storing process pages in main memory. It uses the Least Recently Used ( LRU ) page replacement policy. Assume that all the page frames are initia…
Answer: 6

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