Manonmaniam Sundaranar University (MSU) 2007 B.Sc Computer Science Operating System - Question Paper

Code No. : 1580 Sub. Code : MCS 61


B.SC DEGREE EXAMINATION, APRIL 2007

Sixth Semester

Computer Science -- Main

OPERATING SYSTEMS

(For those who joined in july 2003 onwards)

Time : 3 hours Maximum : 100 marks

PART A -( 10 * one = 10)

Answer ALL the ques..

Choose the accurate ans.

1. A program in execution is called as ___________.

(a) Memory element (b) Data

(b) Command (d) Process


2. Systems with more than 1 processor is called ____________.

(a) Multiprocessor system

(b) Multiple processing system

(c) Multi threaded systems

(d) Distributed sytems.

3. The term throughput is used to measure the

(a) number of processes that are completed per unit time

(b) interval from the time of submission of a process to the time of completion

(c) sum of the periods spent waiting in the ready queue

(d) time from the submission of a request until the 1st process is produced

4. ________________ algorithm can reason short processes to wait for long processes.

(a) Round Robin Scheduling

(b) 1st Come 1st Served

(c) Priority Scheduling

(d) Shortest Job 1st Scheduling.

5. _____________ is the separation of user logical memory from physical memory.

(a) Main Memory

(b) learn Only Memory

(c) Random Access Memory

(d) Virtual Memory

6. ___________ is the solution to external fragmentation.

(a) Swapping (b) Protection

(c) Compaction (d) Sharing

7. ____________ organises and provides info about files.

(a) File structure

(b) Directory

(c) File System

(d) File allocation table

8. To give an efficient and convienient access to the disk, the OS imposes a_____________

(a) File system

(b) Directory

(c) File structure

(d) File allocation table

9. The linux System contains

(a) Kernel

(b) System libraries

(c) System Utilities

(d) All the above.

10. Registration tables in linux includes

(a) Device Drivers (b) File system

(c) N/W Protocols (d) All the above.


PART B--(5 * six = 30 marks)

Answer All the questions, choosing either (a) or (b).

11. (a) explain about Real Time Systems.

Or

(b) discuss briefly about Process Control Blocks.

12. (a) describe the subsequent :

(i) throughput

(ii) turnaround time

(iii) response time

Or

(b) elaborate the different conditions for a deadlock? Write short notes on it.

13. (a) Write short notes on Dynamic Linking.

Or

(b) explain about Demand Segmentation.

14. (a) discuss the different File Operations.

Or

(b) discuss about SSTF scheduling.

15. (a) discuss the process cincept in Linux.

Or

(b) explain how access control is applied to different objects index Linux System.


PART C -- ( five * 12 = 60 marks)


Answer All question, choosing either (a) or (b).

16. (a) discuss the operation of Modern Computer with a neat diagram.

Or

(b) discuss about OS system services.

17. (a) discuss in detail about :

(i) SJF - Scheduling

(ii) Round Robin Scheduling.

Or

(b) discuss how deadlock can be prevented?

18. (a) Write in detail about contiguous memory allocation.

Or

(b) Write in detail on thrashing, causes of thrashing working set model.

19. (a) discuss the different schemas for defining the logical structure of Directory.

Or

(b) explain in detail about Disk management.

20. (a) Write in detail about Process Management inLinux.

Or

(b) discuss Linux Security Model.


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Earning:   Approval pending.