Veer Narmad South Gujarat University 2007 M.C.A Unix of Veer Narmad south university - Question Paper
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*DK 4832/200*
DK-4832 M. C. A. (Sem. V) Examination December - 2007 Unix Internal & Shell Programming (Paper - 502)
[Total Marks : 70
Time : 3 Hours] Instruction :
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Unix Internal & Shell Programming (Paper-502) | | |
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Subject Code No.: 4 8 3 2 -Section No. (1,2......).| Nil | | |
1 Answer in short : (any ten) 20
(a) Explain hard link and soft link. What is limitation of soft link ?
(b) Explain sticky bit. Give examle.
(c) Where is password stored ? Explain the structure of the file.
(d) Explain with example use of /dev/tty and /dev/null.
(e) Explain different stage of process.
(f) Explain different run level of unix.
(g) What information is stored in i-node block ?
(h) Explain in brief different features of shell.
(i) What does the super block contain ?
(j) Explain major and minor number in case of device file.
(k) Explain in brief the wait system call.
(I) Explain in brief the mount command.
[Contd..
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DK-4832]
z Attempt any six : 10
(a) Explain the concept of array in awk.
(b) Explain in brief effect of directory permission.
(c) Discuss in brief architecture of unix.
(d) Discuss in brief how a directory is stored in i-node block and data block.
(e) What is boot loader ? Explain init 0 and init 1 process.
Explain in brief the buffer cache header.
(g) Explain device file in details.
3 Explain the following : (any two) 12
(a) Explain the fields of PCB along with their purpose that will be passed by parent to its child on creation.
(b) Explain in brief how an i-node block is assigned to a file.
(c) Explain fork( ) system call. Write a small program to demonstrate it.
4 Explain the following commands : (any five) 10
find, export, write, nice, fd, tar, less.
5 Attempt the following : 10
(a) Write a shell script to display only username who have login and those users that have logout.
(b) Write a shell script to count number of fine, word and character of give file name using command line parameter. Do no use wc command.
(c) Write a shell script to count the file in given directory which does not have execute permission.
(d) Write a shell script to display default shell and default group id of given user if he has not logged in.
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