Operating System Unit 4 – Memory Management: AKTU previous year questions
27 AKTU questions from Unit 4 (Memory Management) asked in 2018–2025, tagged by marks, year and topic. In short: about 24 marks of every paper come from this unit; the most asked topic is Virtual Memory (11 times); 16 questions came back in a later year. The latest ones are listed below; on the page you can filter them by 2-mark or long questions, topic and repeats.
Unit 4 previous year questions
- What is the purpose of a page replacement algorithm? (2 marks, 2025, Virtual Memory)
- In optimal page replacement algorithm, information about all future page references is available to the OS. A modification: OS correctly predicts only up to next 4 page references. A process accesses pages: 1, 3, 2, 4, 2, 3, 1, 2, 4, 3, 1, 4. If the system has three memory frames that are initially empty, find the number of page faults. (7 marks, 2025, Virtual Memory)
- Discuss multiprogramming with variable partitions and how it improves memory utilization. (7 marks, 2025, Basic Memory Management)
- Consider a demand paging memory management system with 32-bit logical address, 20-bit physical address, and page size of 2048 bytes. Assuming that the memory is byte addressable, what is the maximum number of entries in the page table? (7 marks, 2025, Virtual Memory)
- Define a resident monitor? (2 marks, 2024, Basic Memory Management)
- Compare and contrast multiprogramming with fixed partitions and variable partitions? (7 marks, 2024, Basic Memory Management)
- Explain the principles of paging and segmentation as memory management techniques, comparing their suitability for different system architectures? (7 marks, 2024, Paging and Segmentation)
- Discuss virtual memory concepts, including address translation, page tables, and demand paging mechanisms? (7 marks, 2024, Virtual Memory)
- Explain internal and external fragmentation. (2 marks, 2023, Basic Memory Management)
- Explain thrashing and locality of reference. (2 marks, 2023, Virtual Memory)
- Distinguish between physical and logical address space of a process. (2 marks, 2023, Paging and Segmentation)
- Explain the concept of paging. Also, explain paging hardware support using TLB with suitable diagram. (10 marks, 2023, Paging and Segmentation)
Most asked Unit 4 topics
- Virtual Memory – asked 11 times
- Basic Memory Management – asked 9 times
- Paging and Segmentation – asked 7 times
Unit 4 question pattern
- 2-mark questions: 11 asked in 2018–2025
- 7-mark questions: 12 asked in 2018–2025
- 10-mark questions: 4 asked in 2018–2025
- About 24 marks from Unit 4 in every paper
- 16 questions were asked again in a later year
Unit 4 questions year by year
- 2025: 4 Unit 4 questions asked (23 marks across that year's papers)
- 2024: 4 Unit 4 questions asked (23 marks across that year's papers)
- 2023: 6 Unit 4 questions asked (36 marks across that year's papers)
- 2022: 3 Unit 4 questions asked (14 marks across that year's papers)
- 2019: 5 Unit 4 questions asked (25 marks across that year's papers)
- 2018: 5 Unit 4 questions asked (25 marks across that year's papers)