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AKTU Operating System Important Questions - Unit-Wise

Operating System (BCS-402) is a numerical subject disguised as a theory subject. Students who only read definitions struggle, while students who practise scheduling and page replacement problems score highly — and AKTU reuses those problem patterns with only the numbers changed.

operating system exam intelligence

Study material (21 resources)

operating system study guide

This unit-wise list covers the questions that actually repeat: process states and PCB structure from Unit 1; CPU scheduling numericals on FCFS, SJF, SRTF, priority and Round Robin with Gantt charts and average waiting-time calculations from Unit 2; process synchronisation, the critical section problem, semaphores, producer-consumer and the dining philosophers problem plus deadlock detection with Banker's algorithm from Unit 3; paging, segmentation and page replacement numericals on FIFO, LRU and Optimal from Unit 4; and file systems with disk scheduling algorithms from Unit 5.

Each numerical pattern is shown with a fully worked solution, since method marks matter as much as the final answer. Draw the Gantt chart, show the table, and state the formula — that alone separates a five-mark answer from a two-mark one.

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Frequently asked questions

Which OS numericals are asked most in AKTU?

CPU scheduling with average waiting and turnaround time, page replacement using FIFO, LRU and Optimal, Banker's algorithm for deadlock avoidance, and disk scheduling algorithms are the most repeated numericals.

How do I score well in AKTU Operating System?

Practise numericals daily and always show the full working — Gantt charts, tables and formulas. Roughly half the paper is calculation based, so problem practice beats reading notes repeatedly.