Wednesday, September 4, 2013

4 BCA 4 UNIX OPERATING SYSTEM JUNE 2008 QUESTION PAPER

                               IV SEMESTER B.C.A EXAMINATION JUNE 2008
                                                    NEW SCHEME
                                            COMPUTER SCIENCE
                                     UNIX OPERATING SYSTEM
                                                4 BCA 4

TIME:3HOURS                                                           MAX.MARKS:80

Instructions :Anwer all the sections.

SECTION-A

Answer any 8 of the following quesitons.     8 X 3 = 24

1.What are the main features of    Unix  OS ?

2.Explain the architecutre of Unix  System.

3.Explain the use of  fork and kill system calls with example.



4.Explain the use of:

i) at

ii)  batch

iii) crontab commands

5.Mention different types of file permission available in Unix OS.

6.Explain the process  of  multitasking in   Unix  OS.

7,.What is shell? What are the drawbacks of bourne shell over C shell ?

8. Explain various types of   files in unix ?

9.Explain a daemon process ?

10.Mention the commands for  secondary storage management.

SECTION - B

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

11.a) Explain how Unix OS  stores files on the disk

      b) Write a shell program to find whether a given number is odd or even ?    10 + 4

12.a) what is the difference between Unix and DOS  operating System.

       b) Explain in detail the Unix Kernel System.       4 + 10

13. a) write a note on process scheduling.

       b) Explain different stages of a process and its associated Unix System calls   7 + 7

14.a)Explain different loop  control structure available in Bourne shell.

      b) Write the steps involved  in CREAT () System call.        10 + 4

15.a) what are the different modes of setting file permissions ? Explain with an examples

      b)Write a shell program to find out whether the given string is a polindrome or not  7 + 7

16.a) Explain the main functions of system administrator ?

      b) Explain sending and handling mails in Unix.    7 + 7


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