4 BCA 4 :UNIX OPERATING SYSTEM NOV/DEC 2006 QUESTION PAPER

                           IV SEMESTER B.C.A. EXAMINATION NOV/DEC 2006
                                                                NEW SCHEME
                                                       COMPUTER SCIENCE
                                         4 BCA 4 :UNIX OPERATING SYSTEM


Time : 3Hours                                                                            Max.Marsk:80

Instruction : Answer all sections

SECTION-A

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

1.Explain shell and kernel with a  neat diagram

2.What  is data  block ? Explain .

3.Explain about cal comand and cat command.



4.Explain the stream editor sed.

5.How the process execution takes places using the command  nice ?

6.Explain M.V. C P and rm Commands of files.

7.Explain trap to catch the interrupts.

8.What is a system Call ? Explain any two system calls.

9.Explain the filter grep family.

10.LIst the jobs of system administrators.


SECTION-B

Answer any fout of the following questions: 4 X 14 = 56

11,a) Explain the features of Unix Operating  System.

     b)How does Unix access files ?                                     7 + 7

12.a) Explain user and super user privileges.

    b)What are the rules for building shell variables ?    8 + 6

13.a)Explain with examples of library functions in awk

     b)Explain Expr and Exec statements.       7 + 7

14.a)Explain No hup commands.

    b)Explain process scheduling commands.   7 + 7

15.a)Write a shell program to find whether the given year is leap year or not.

    b)What is a signal ? Explain the different types        8 + 6

16.a)Explain until and case statement in bourne shell with an example.

    b)Explain the internal representation of  files with respect to direct and indirect blocks .  7 + 7