Tuesday, December 7, 2010

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD MCA-II Semester Supplementary Examinations July 2010 OPERATING SYSTEMS

Code No: 22001

Time: 3hours
Max.Marks:60

Answer any Five questions

All questions carry equal Marks

1. a) What are the functions of Operating Systems?
b) What is Virtual Machine? What are the advantages of Virtual Machine?

2. a) Distinguish between Process and Thread?
b) What is Inter Process Communication? Explain various Models for IPC?

3. a) What is Monitor? Explain.
b) Give a Monitor Solution to dining – philosopher problem?

4. a) What are necessary conditions for Deadlock Occurrence?
b) Write and explain Banker’s algorithm?

5. a) Compare and Contrast between various Disk Scheduling Methods?
b) Explain steps in execution of a user program.

6. Discuss about various Page Replacement Algorithms? Give their relative advantages and limitations.

7. Write short notes on the following
a) General Graph based Directory Structure.
b) Indexed File Allocation Method.

8. a) What are the contents of Access Matrix? How it is implemented?
b) Distinguish between the following program threats, Trojan Horse, Trap Door and Logic Bomb?

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