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B.E./B.Tech. DEGREE EXAMINATION
(Regulation/Scheme 2010)
10CS53 Operating Systems
Fifth Semester - 5th
Computer Science Engineering - CSE
(Common to Information Science Engineering)

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UNIT 1: INTRODUCTION TO OPERATING SYSTEMS & THEIR CLASSIFICATION

Objective: The main objective of this chapter is to study the Operating system basics & Classifications.

1. What are the 3 main purposes of an Operating System?
2. Explain the concept of virtual machines.
3. Explain the distinguishing features of
i) Real time system ii) Multiprocessor system
4. What is the purpose of command interpreter? Why is it usually separate from the Kernel?
5. What is an Operating System? Explain considering different possible views
6. What is operating system? What are functions of operating system?
7. What are multiprocessor systems? Give advantages.
8. What is the main difficulty that a programmer must overcome in writing an operating system for real time environment?
9. Define spooling and the need for it. Explain its working with necessary diagrams.
10. Explain the following terms and their working with diagram
a) Buffering b) Spooling c) Time sharing d) Distributed system e) Real-time
11. Compare tightly coupled systems with loosely coupled systems.
12. Describe differences between symmetric and asymmetric multiprocessing. What are three advantages and one disadvantages of multiprocessor systems?
13. Explain distinguished features of
i) Time-sharing system ii) Parallel processing
14. Write a brief note on different operating system structures
15. Explain different sub components of an operating system.
16. Bring out the requirements of
i) Real time operating systems (ii) Distributed operating systems
17. What is an Operating System? Justify the statement “Operating System can be viewed as a government, resource allocator and a control program”.
18. Define essential properties of the following types of Operating system:
i) Batch operating system ii) Interactive  operating system
ii) Time sharing operating system iv) Real time operating system
v) Distributed operating system
19. Distinguish among the following terminologies associated with the operating system and explain each of them in detail.
i) Multiprogramming systems.
ii) Multitasking systems.
iii) Multiprocessor systems.
20. Define Operating systems. Discuss its role with user and view points
21. Define a virtual machine (VM). With a neat diagram, explain the working of a VM. What are the benefits of a VM?
22. Explain the 'graceful degradation' and 'fault tolerant' in a multiprocessor system. 6
23. Write and explain the sequence of system calls for copying a file to another (new) file. 5
24. What are system calls? Explain the different categories of the system calls. . 10



UNIT 2: OPERATING SYSTEM STRUCTURES

Objective: The Operating System provides certain services to programs and to the users of those programs in order to make their tasks easier. The services differ from the operating system to another, but we identify and explore some common classes of these services.