BCA 201 :OPERATING SYSTEM MAY/JUNE 2010

                                II Semester B.CA. Examination,May/June 2010
                                                   Y2K7 Scheme
                                          COMPUTER SCIENCE
                                       BCA-201 :Operating System

Time:3Hours                                              Max.Marks:60

Instructions: Answer all the parts

PART-A  8X3=24

Answer any eight questions.

1.Explain spooling.

2,What are the advantages of multiprogramming?

3.What are the advantages of virtual machine architecture?




4.Differentiate between preemptive and non preemptive scheduling?

5.Define job schedular and CPU Scheduler.

6.Explain the differnece between internal and external fragmentaion?

7.What is free space management?

8.what is process termination?

9.what is segmentaion?

10.Differentaite between worm and virus?

PART-B

Answer any four questions 4X14=56

11.a) Explain various functions of operating system.  7marks
 
    b)Explain system calls.    7marks

12.a)Explain process control block.   6marks

   b)Explain any two CPU scheduling algorithm.8marks

13. a) Explain the role of semaphore and it types 5marks
 
     b)what is dead lock? Briefly explain the necessary conditions of dead lock to occour?  9marks

14.a)Explain any two page replacement algorithm.    8marks

     b)Explain virtual memory.  6marks

15.a)Explain six basic file operations.  8marks

      b) Distinguish between protection and security.Explain the measures adopted for
 
       authenticatin.     6marks

16. Write a short notes:

     a) Threads .        4marks

     b) Critical Section problem . 5marks

    c) Disk Scheduling algorithm.   5marks