Operating System Unit 5 – I/O Management and File Systems: AKTU previous year questions
27 AKTU questions from Unit 5 (I/O Management and File Systems) asked in 2018–2025, tagged by marks, year and topic. In short: about 30 marks of every paper come from this unit; the most asked topic is File System (12 times); 19 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 5 previous year questions
- Explain file directories and directory structures in operating systems. (7 marks, 2025, File System)
- Consider a disk queue with requests for I/O to blocks on cylinders 47, 38, 121, 191, 87, 11, 92, 10. The C-LOOK scheduling algorithm is used. The head is initially at cylinder number 63, moving towards larger cylinder numbers on its servicing pass. The cylinders are numbered from 0 to 199. Calculate the total head movement (in cylinders) required to service these requests. (7 marks, 2025, Disk Scheduling)
- Discuss RAID 0, RAID 1, and RAID 5 in detail. (7 marks, 2025, Disk Scheduling)
- Define an I/O subsystem? (2 marks, 2024, I/O Management)
- Compare and contrast different disk storage technologies, such as HDDs and SSDs? (7 marks, 2024, Disk Scheduling)
- Discuss the organization of files within file systems, including contiguous, linked, and indexed allocation methods? (7 marks, 2024, File System)
- Explain the structure and management of file directories, including hierarchical and flat directory structures? (7 marks, 2024, File System)
- Explain various operations associated with a file. (2 marks, 2023, File System)
- Explain tree level directory structure. (2 marks, 2023, File System)
- Explain the term RAID and its characteristics. Also, explain various RAID levels with their advantages and disadvantages. (10 marks, 2023, Disk Scheduling)
- Explain the concept of file system management. Also, explain various file allocation and file access mechanisms in details. (10 marks, 2023, File System)
- Suppose the following disk request sequence (track numbers) for a disk with 100 tracks is given: 45, 20, 90, 10, 50, 60, 80, 25, 70. Assume that the initial position of the R/W head is on track 49. Calculate the net head movement using: (i) SSTF (ii) SCAN (iii) CSCAN (iv) LOOK. (10 marks, 2023, Disk Scheduling)
Most asked Unit 5 topics
- File System – asked 12 times
- Disk Scheduling – asked 11 times
- I/O Management – asked 4 times
Unit 5 question pattern
- 2-mark questions: 7 asked in 2018–2025
- 7-mark questions: 11 asked in 2018–2025
- 10-mark questions: 9 asked in 2018–2025
- About 30 marks from Unit 5 in every paper
- 19 questions were asked again in a later year
Unit 5 questions year by year
- 2025: 3 Unit 5 questions asked (21 marks across that year's papers)
- 2024: 4 Unit 5 questions asked (23 marks across that year's papers)
- 2023: 6 Unit 5 questions asked (44 marks across that year's papers)
- 2022: 7 Unit 5 questions asked (54 marks across that year's papers)
- 2019: 5 Unit 5 questions asked (25 marks across that year's papers)
- 2018: 2 Unit 5 questions asked (14 marks across that year's papers)