Operating System PYQ 2018-19 AKTU Question Paper

AKTU · BTECH · Semester 4 · Operating System · Session 2018-19 · PYQ

AKTU Operating System previous year question paper 2018-19 for B.Tech Semester 4. Covers Introduction to Operating Systems, Concurrent Processes, CPU…

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Operating System AKTU syllabus

  1. Unit 1: Introduction to Operating Systems
  2. Unit 2: Concurrent Processes
  3. Unit 3: CPU Scheduling and Deadlock
  4. Unit 4: Memory Management
  5. Unit 5: I/O Management and File Systems

Questions in Operating System AKTU PYQ 2018-19

  1. Q1a. Describe the typical elements of the process control block. (2 marks, 2018-19)
  2. Q1b. What are the various scheduling criteria for CPU scheduling? (2 marks, 2018-19)
  3. Q1c. What is the main function of the memory-management unit? (2 marks, 2018-19)
  4. Q1d. Define seek time and latency time. (2 marks, 2018-19)
  5. Q1e. Define SCAN and C-SCAN scheduling algorithms. (2 marks, 2018-19)
  6. Q1f. What is a safe state and an unsafe state? (2 marks, 2018-19)
  7. Q1g. Explain the logical address space and physical address space diagrammatically. (2 marks, 2018-19)
  8. Q2a. Define Process. Explain various steps involved in change of a process state with neat transition diagram. (7 marks, 2018-19)
  9. Q2b. Explain Batch operating system with example. (7 marks, 2018-19)
  10. Q2c. What is a Critical Section problem? Give the conditions that a solution to the critical section problem must satisfy. (7 marks, 2018-19)
  11. Q2d. Illustrate the page-replacement algorithms (i) FIFO (ii) Optimal Page Replacement. Use the reference string 7, 0, 1, 2, 0, 3, 0, 4, 2, 3, 0, 3, 2, 1, 2, 0, 1, 7, 0, 1 for a memory with three frames. (7 marks, 2018-19)
  12. Q2e. A hard disk having 2000 cylinders, numbered from 0 to 1999. The drive is currently serving the request at cylinder 143, and the previous request was at cylinder 125. The status of the queue is as follows: 86, 1470, 913, 1774, 948, 1509, 1022, 1750, 130. What is the total distance (in cylinders)… (7 marks, 2018-19)
  13. Q3a. What is an Operating system? Describe the Operating-System Functions. (7 marks, 2018-19)
  14. Q3b. Write about monolithic kernel, layered, and microkernel structures of operating systems. (7 marks, 2018-19)
  15. Q4a. Explain what semaphores are, their usage, implementation given to avoid busy waiting and binary semaphores. (7 marks, 2018-19)
  16. Q4b. What is Producer Consumer problem? How it can illustrate the classical problem of synchronization? Explain. (7 marks, 2018-19)
  17. Q5a. Consider the following process: P1(AT=0,BT=8), P2(AT=1,BT=4), P3(AT=2,BT=9), P4(AT=3,BT=5). What is the average waiting and turn around time for these processes with (i) FCFS Scheduling (ii) Preemptive SJF Scheduling. (7 marks, 2018-19)
  18. Q5b. Consider the following snapshot of a system: Allocated P1(2,2,3), P2(2,0,3), P3(1,2,4). Maximum P1(3,6,8), P2(4,3,3), P3(3,4,4). Available(7,7,10). Answer the following questions using the banker's algorithm: 1) What is the content of the matrix need? 2) Is the system in a safe state? (7 marks, 2018-19)
  19. Q6a. Explain Paging with example. Differentiate Paging and Segmentation. (7 marks, 2018-19)
  20. Q6b. Explain the difference between External fragmentation and Internal fragmentation. How to solve the fragmentation problem using paging. (7 marks, 2018-19)
  21. Q7a. What are files and explain the access methods for files. (7 marks, 2018-19)
  22. Q7b. Write short notes on: i) File system protection and security and ii) Linked File allocation methods. (7 marks, 2018-19)

AKTU paper codes: BCS401, KCS401, RCS401

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