1. What is operating system? Explain multiprogramming and time-sharing systems. (06 Marks) (Dec.2019/Jan.2020)

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2. Explain dual mode operating in operating system with a neat block diagram. (05 Marks) (Dec.2019/Jan.2020)

3. What are system calls? Briefly point out its types. (05 Marks) (Dec.2019/Jan.2020)

4. Explain process states with state transition diagram. Also explain PCB with a neat diagram. (06 Marks) (Dec.2019/Jan.2020)

5. What is inter process communication? Explain its type. (05 Marks) (Dec.2019/Jan.2020)

6. With a neat diagram, explain the concept of virtual machines. (05 Marks) (Dec.2019/Jan.2020)

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7. Explain the role of operating system from different viewpoints. Explain the dual mode of operation of an operating system. (07 Marks) (June/July.2019)

8. Demonstrate the concept of virtual machine with an example. (05 Marks) (June/July.2019)

9. Explain the types of multiprocessing system and the types of clustering. (04 Marks) (June/July.2019)

10. Describe the implementation of inter-process communication using shared memory and message passing. (06 Marks) (June/July.2019)

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11. Demonstrate the operations of process creation and process termination in UNIX. (06 Marks) (June/July.2019)

12. Explain the different states of a process, with a neat diagram. (04 Marks) (June/July.2019)

13. Distinguish between the following terms:

I) Multiprogramming and multitasking

II) Multiprocessor systems and clustered systems. (04 Marks) (Dec.2018/Jan.2019)

14. Analyze modular kernel approach with layered approach with a neat sketch. (06 Marks) (Dec.2018/Jan.2019)

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15. List and explain the services provided by OS for the user and efficient operation of system. (06 Marks) (Dec.2018/Jan.2019)

16. Illustrate with a neat sketch, the process states and process control block. (08 Marks) (Dec.2018/Jan.2019)

17. Discuss the methods to implement message passing IPC in detail. (08 Marks) (Dec.2018/Jan.2019)

18. Define Operating System. with a neat diagram, explain the dual-mode operation of operating system. (08 Marks) (June/July 2018)

19. Explain the services of operating system that are helpful for user and the system. (06 Marks) (June/July 2018)

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20. Define the following terms:

i) Virtual Machine

ii) CPU scheduler

iii) System call

iv) Context switch. (10 Marks) (June/July 2018)

21. With neat diagram, explain the different states of a process. (08 Marks) (June/July 2018)

22. Explain the layered approach of operating system structure, with supporting diagram. (05 Marks) (June/July 2018)

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23. What is inter process communication? Explain direct and indirect communication with respect to message passing system. (06 Marks) (June/July 2018)

24. What is an operating system? Explain abstract view of component of a computer system. (07 Marks) (Dec.2017/Jan.2018)

25. List the different services that an operating system provides. Explain. (06 Marks) (Dec.2017/Jan.2018)

26. Explain the concept of virtual machines. Bring out its advantages. (07 Marks) (Dec.2017/Jan.2018)

27. What is a process? With a state diagram, explain states of a process. (08 Msrks) (Dec.2017/Jan.2018)

28. Describe the implementation of IPC using shared memory and message passing. (07 Marks) (Dec.2017/Jan.2018)

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29. Consider the following set of process,

Process	Arrival Time	Burst Time
P1	0	6
P2	2	3
P3	4	3
P4	5	5

i. Draw the Gantt chart showing the execution of the following process FCFS, SRTF and RR (quantum = 1 m sec)

ii. Compute the turnaround time, waiting time and average waiting time for each process. (08 Marks) (Dec.2017/Jan.2018)

30. Explain the advantages of layered approach, with a diagram. (06 Marks) (June/July.2017)

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31. Write the system call sequence to copy a file from source to destination. (06 Marks) (June/July.2017)

32. With a neat diagram, explain the concept of virtual machines. (08 Marks) (June/July.2017)

33. Explain the process states with diagram. (June/July.2017)

34. Explain the different multithreading models, with neat sketches. (June/July.2017)

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35. Consider the following set of processes. Draw Gantt charts and calculate average waiting time and average turnaround time using non-pre-emptive SJF and pre-emptive SJF scheduling algorithms. (June/July.2017)

Process	Arriva; Time (ms)	Burst Time (ms)
P1	0	8
P2	1	4
P3	2	9
P4	3	5

36. Distinguish between the following pairs of terms :

i) Symmetric and asymmetric multiprocessor systems

ii) CPU burst-and 1/O burst jobs

iii) User's view and systems view of OS

iv) Batch systems and time sharing systems

v) User mode and kernel mode operations. (10 Marks) (Dec.2016/Jan.2017)

37. List the three main advantages of multiprocessor systems. Also bring out the difference between graceful degradation and fault tolerance in this context. (5 Marks) (Dec.2016/Jan.2017)

38. What are virtual machines? How are they implemented? (5 Marks) (Dec.2016/Jan.2017)

39. What is a process? What are the states a process can be in? Give the process state diagram clearly indicating the conditions for a process to shift from one state to another. (8 Marks) (Dec.2016/Jan.2017)

40. What are the merits of inter process communication? Name the two major models of inter process Communication. (6 Marks) (Dec.2016/Jan.2017)

41. What is a thread? What is need for multithreaded processes? Indicate the four major categories of benefits derived from multi-threaded programming. (6 Marks) (Dec.2016/Jan.2017)

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42. Define an Operating System. What are the different facts of user convenience? (06 Marks) (June/July.2019|10 Scheme)

43. Explain Partition based and pool based resource allocation. (06 Marks) (June/July.2019|10 Scheme)

44. Explain time sharing operating system with respect to:

i. Scheduling

ii. Memory Management. (08 Marks) (June/July.2019|10 Scheme)

45. Explain the following:

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i. Semantic gap

ii. Layered operating system structure. (08 Marks)

46. Compare Kernel based and Micro Kernel based OS functions. (06 Marks)

47. Explain Virtual Machine Operating System [VMOS] with example. (6 Marks)