B.Voc DEGREE EXAMINATION, NOVEMBER 2015
Software Development
OPERATING SYSTEMS
(2015 onwards)
Time Three Hours Maximum 75 Marks
Part A (10 2 20)
Answer all questions.
1. What is job control language?
2. What is a file?
3. Define process.
4. What is meant by preemptive scheduling?
5. What are the different memory management schemes?
6. What is a dirty page?
7. What are the elements of security?
8. What is a virus?
9. What is a directory?
10. What is the purpose of "cat" command in UNIX?
Sub. Code
4SD3C1
RW-10392
2
SP4
Part B 5 25)
Answer all questions.
11. Explain the features of third generation computer
and its operating systems.
Or
Compare and contrast network and distributed
operating systems.
12. Draw the process state transition diagram and
define the states.
Or
What are the necessary conditions for a dead lock to
occur? Explain.
13. Explain about the implementation of page map
tables.
Or
Discuss LRU algorithm for page replacement with
an example.
14. Write short notes on computer worms.
Or
Explain the general design principles of protection
mechanism.
15. Explain different types of files in UNIX.
Or
Explain about MOUNT/UNMOUNT in UNIX.
RW-10392
3
SP4
Part C 10 30)
Answer any three questions.
16. Describe the evolution of operating systems.
17. Describe the procedures and algorithms of process
creation and deletion in detail.
18. Explain the fixed partitioning in memory management
scheme.
19. Explain some of the basic requirements of a windowsbased
GUI.
20. Describe the architecture of UNIX system.