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Operating System (BCS401) AKTU PYQ analysis – unit-wise weightage

We analysed 137 questions from 6 AKTU Operating System papers (2018–2025). Here is how marks are spread across units and which topics keep coming back.

Operating System unit-wise weightage

  • Unit 1: Introduction to Operating Systems – 21% of questions, about 21 marks per paper
  • Unit 2: Concurrent Processes – 23% of questions, about 23 marks per paper
  • Unit 3: CPU Scheduling and Deadlock – 36% of questions, about 36 marks per paper
  • Unit 4: Memory Management – 24% of questions, about 24 marks per paper
  • Unit 5: I/O Management and File Systems – 30% of questions, about 30 marks per paper

Most repeated Operating System topics in AKTU PYQs

  • CPU Scheduling
  • Deadlock
  • File System
  • Virtual Memory
  • Disk Scheduling

Unit 1 (Introduction to Operating Systems) – top topics

  • OS Functions and Structure – asked 10 times, last in 2025
  • Classification of Operating Systems – asked 10 times, last in 2025
  • Kernel Types – asked 2 times, last in 2022

Unit 2 (Concurrent Processes) – top topics

  • Mutual Exclusion – asked 8 times, last in 2025
  • Process Concept and Concurrency – asked 6 times, last in 2025
  • Semaphores and Test Set – asked 4 times, last in 2023

Unit 3 (CPU Scheduling and Deadlock) – top topics

  • CPU Scheduling – asked 22 times, last in 2025
  • Deadlock – asked 14 times, last in 2025
  • Threads and Management – asked 1 times, last in 2022

Unit 4 (Memory Management) – top topics

  • Virtual Memory – asked 11 times, last in 2025
  • Basic Memory Management – asked 9 times, last in 2025
  • Paging and Segmentation – asked 7 times, last in 2024

Unit 5 (I/O Management and File Systems) – top topics

  • File System – asked 12 times, last in 2025
  • Disk Scheduling – asked 11 times, last in 2025
  • I/O Management – asked 4 times, last in 2024