Punjab University 2011-2nd Year B.C.A Computer Application Unix operaing system, , - Question Paper

(i)Questions :9 Roll No......
Sub.Code:0896
Exam.Code:121
BCA-2nd Year
2041

UNIX OPERATING SYSTEM
Paper:BCA-14

Time Allowed:Three Hours
Maximum Marks:90

Note:-(i) Attempt 5 ques. selecting 1 ques. every from
Sections A,B,C,D.
(ii) Section E is compulsory.
(iii) All ques. carry equal marks.

SECTION-A

I. (a) What is an operating system(OS)?Explain the different
functions and features of UNIX OX.

(b) discuss the difference ranging from UNIX and WINDOWS OS. 9,9=18


II. describe and differentiate the subsequent pairs:

(a)Parallel Systems and Distributed Systems

(b)Unix Kernel and Unix Shell. 9,9=18


SECTION-B

III. discuss the subsequent in UNIX by taking improper examples:

(a)Concatenating files
(b)Displaying beginning and End of files
(c)Cut and paste
(d)Sorting 4x4.5=18

IV. (a)How do you achieve inter-user and inter-machine communication
in Unix operating system?Explain in detail.

(b)Explain the purpose of the followoing commands in UNIX:

(i) who|sort

(ii) Is | wc -I

(iii)who | wc -I

(iv) who | grep UNIX 10,8=18

SECTION-C

V. What is UNIX system administration and what does it entail?Expain
the role and function of a system administrator in UNIX.Discuss
the role of tar facility and fsck facility for system
administration. 18

VI. How will you perform the subsequent as a UNIX administrator?

(a)Adding and removing user accounts

(b)Hard disk administration. 9,9=18

SECTION-D

VII. Write a UNIX shell script to check whether a provided string is a
palindrome or not. 18

VIII.Write short notes on the following:

(a) AWK

(b) Mail server under UNIX 9,9=18

SECTION-E

IX. explain briefly:(Attempt all parts)

(i) What is multiprogramming?

(ii) What do you mean by a background process?

(iii) What is a root account in UNIX?

(iv) Suppose your umask is set to "123".What is the initial access

permission for a file you create?What is it for a directory?

(v) The UNIX command for shutting down a UNIX system is _________

and the UNIX command for changing the user password is_______.

(vi) What is DNS? 6x3=18

Earning:   Approval pending.