IV SEMESTER BCA EXAMINATION ,NOV/DEC 2007
NEW SCHEME
COMPUTER SCIENCE
4 BCA 4 : UNIX OPERATING SYSTEM
TIME :3 HOURS MAX.MARKS:80
Instructions : all sections are compulsary
SECTION-A
Answer any eight of the follwoing 8 X 3 = 24
1.Whar do you mean by multiprogramming multiuse rand multitasking?
2.What are the facilities provided by the kernel ?
3.what is the status of EXIT command ?what is sits normal value ?
4.Explain the purpose of grep filter with any two options.
5.Explain the use of fsck and mkfs commands.
6.What is a shell ? what are the different types of shell in UNIX ?
7,Explain a daemon process.
8.Write a shell script to count the number of subdirectory files in a current directoy
and display them
9.Explain briefly Unix system communicaiton.
10.Explain the syntax of sed insturction with d(delete) and s(substitution) options.
SECTION-B
Answe any four of the following questions . 4 X 14 = 56
11.a)Explain the unix system architecture with a neat Diagram
b)Explain different file access permissions and different types of user 7 + 7
12. a)Explain how inodes are accessed with a neat diagram
b) Explain briefly about the following.
i) FORK
ii) EXEC
iii) WAIT
13.a)Write a shell program to create an employee database and perform the following
operations
i) Adding
ii)Modifying
iii)display
b) Explain Until and Case statements in Bourne shell with example 8 + 6
14.a)What are foreground and background process ? Explain ps, nice and nohup
commands.
b) Write a shell script to count the NO. of vowels in a agiven string
c) Explain any three terminal related commands. 7 + 4 + 3
15.a) Explain briefly user and superuser privileges
b) Explain lpr and lprm commands.
c) Explain steps involved in CREAT () and open () system calls. 7 + 3 + 4
16.a)Explain briefly about secondary storae management.
b) Explain sending and handling mails with an example. 7 + 7
NEW SCHEME
COMPUTER SCIENCE
4 BCA 4 : UNIX OPERATING SYSTEM
TIME :3 HOURS MAX.MARKS:80
Instructions : all sections are compulsary
SECTION-A
Answer any eight of the follwoing 8 X 3 = 24
1.Whar do you mean by multiprogramming multiuse rand multitasking?
2.What are the facilities provided by the kernel ?
3.what is the status of EXIT command ?what is sits normal value ?
4.Explain the purpose of grep filter with any two options.
5.Explain the use of fsck and mkfs commands.
6.What is a shell ? what are the different types of shell in UNIX ?
7,Explain a daemon process.
8.Write a shell script to count the number of subdirectory files in a current directoy
and display them
9.Explain briefly Unix system communicaiton.
10.Explain the syntax of sed insturction with d(delete) and s(substitution) options.
SECTION-B
Answe any four of the following questions . 4 X 14 = 56
11.a)Explain the unix system architecture with a neat Diagram
b)Explain different file access permissions and different types of user 7 + 7
12. a)Explain how inodes are accessed with a neat diagram
b) Explain briefly about the following.
i) FORK
ii) EXEC
iii) WAIT
13.a)Write a shell program to create an employee database and perform the following
operations
i) Adding
ii)Modifying
iii)display
b) Explain Until and Case statements in Bourne shell with example 8 + 6
14.a)What are foreground and background process ? Explain ps, nice and nohup
commands.
b) Write a shell script to count the NO. of vowels in a agiven string
c) Explain any three terminal related commands. 7 + 4 + 3
15.a) Explain briefly user and superuser privileges
b) Explain lpr and lprm commands.
c) Explain steps involved in CREAT () and open () system calls. 7 + 3 + 4
16.a)Explain briefly about secondary storae management.
b) Explain sending and handling mails with an example. 7 + 7
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