4 BCA 4 : UNIX OPERATING SYSTEMS NOV/DEC 2009 QUESTION PAPER

                         IV SEMESTER B.C.A EXAMINATIONS NOV/DEC 2009
                                             COMPUTER SCIENCE
                              4BCA-4:UNIX OPERATING SYSTEMS

TIME :3HOURS                                                                   MAX.MARKS:80

Instruction : all sections are compulsary

SECTION-A

Answer any eight of the following 8 X 3 = 24

1. What are the main features of unix operating system ?

2.what is Boot-strapping the system ? Explain

3.what are the different types of files in unix ?




4.What is Background process ?How do you create it ?

5.Write a shell program to find a factorial of a given number.

6.Explain the different level of security in unix.

7. Write a note on file compression facilities in unix.

8.Explain the usage of the following predefined variables.
 
   a)IFS         B)PSI


9.what is daemon process ?

10.Briefly explain I/0 redirections with examples

SECTION - B

Answer any four of the following;               4 X 14 = 56

11.a)Explain unix file system              7marks

     b)Explain unix system  kernel with a neat diagram         7marks

12.a)Explain the different states of a process with a neat diagram   6marks

    b) write a shell program to check a given number is prime or not.   8marks

13.a) Explain the steps involved in the create sysem call.Given an example.   5marks

     b)Explain any three looping statement with an examples   9marks

14.a)Explain fed and awk tools with suitable examples.     7 marks

     b)Write a shell program to  Check wherher the given string is a palindrome or not . 7marks

15.a)Write a shell program to print the fibonacci series upto a given number  7 marks

    b)Write a note on secondary storage management.   7marks

16.a)Explain the following with an  example

      a) Read

       b)Write

      c) Wall

b) Explain briefly supervisor privileges and user privileges.   6 + 8 marks