West Bengal Institute of Technology (WBIT) 2010-6th Sem B.Tech Computer Science and Engineering Computer Science -System Software and Administration - Question Paper
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RoU.No : ......................................................................................... .. ...............
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CS/B.TECH (CSE)/SEM-6/CS-604/2010
SYSTEM SOFTWARE & ADMINISTRATION
Time Allotted : 3 Hours - Full Marks : 70
The figures in the margin indicate JuR marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP - A ( Multiple Choice Type Questions )
1. Choose the correct alternatives for the following :
10x1 = 10
1) Which of the following is START* ?
a) Machine-op .
b) Pseudo-op
c) Can be either of above two
d) None of these.
ii) Link editor is an instance of
0 an editor b) an asembler
c) a binder d) none of these.
CS/B.TECH (CSEJ/SEM-6/CS-604/2010
m Execute permission on a file is required to
a) launch that file as a program
b) create a directory with a matching name
c) allow other users to read the file
d) use the insmod command to add the file as a module.
iv) The Shadow Password system enhances security by
a) checking that new passwords entered for users are not easily guessed
b) hiding encrypted passwords in a file that only root can read
* c) validating member of the group as they log in
d) hone of these.
v) Based on the following line from a users crontab file, when will the Brekeleylives program be run ?
0 12 3 * Brekeleylives :
a) At 1 : 23 A.M. everyday
. b) . At 1 : 00 AIM. on March 2
c) At 1 : 00 A.M. on February 3
d) At 2 : 00 A.M. on March 2.
CS/B.TECH (CSEJ/SEM-6/CS-604/2010
vl) When you run the umask command, you see the following result: 0000. The next time you create a file, what will be the permissions ?
a) drwxrwxrwx '
b) ........ .......
c) - rwxr-x-r-x
d) - rw-rw-rw-.
vii) When UNUX boots, what configuration file does LINUX use to see what NFS shares to mount ?
a) /etc/exports
b) /etc/nfs.conf
c) /etc/fstab
d) /nfs/conf.
vili) Which of the following commands check the setup of the database on your DNS server ?
a) dnscheck
b) BIND
c) dig
d) resolve.
CS/B.TECH (CSEJ/SEM-6/CS-604/2010
ix) Consider the following command :
# iptables - A INPUT-s 192.168.77.77 - j REJECT
What effect will this have when the client with an IP of 192.168.77.77 tries to connect to your system ?
a) No effect at all.
b) Access will be denied, and the client computer wont get any message on what happened.
c) Access will be denied, and the client application will get a message that the target destination is unreachable
d) You will receive a notification message on the system console.
x) To see the partition table, which of these commands is used
a) fsck b) fdisk-1
c) du d) none of these.
GROUP-B ( Short Answer Type Questions )
Answer any three of the following. 3 x 5 = 15
2. How forward reference is tackled by one pass and two pass assemblers ?
3. List the different runlevels. How do they differ ? List some standard shutdown techniques.
4. What do you mean by Network Address translation ?
5. What is the difference between sharing information through NIS and through NFS ? Differentiate between NIS and NIS +.
6. Distinguish between Disk Inode and Incore Inode.
GROUP - C ( L6ng Answer Type Questions )
- Answer any three of the following. 3x 15 = 45
7. a) What is firewall ?
b) What is IP spoofing ?
c) How is it resolve using firewall ?
d) Explain in detail of Ipfwadmcommand.
e) What is the difference between antivirus and firewall ?
f) How many run levels are there in Linux ? Describe their functions. How do you know the current run level ? 2 + 2 + 3 + 3 + 2 + 3
8. aj Explain working principle of macro processor.
b) Compare compiler y- and go loader with absolute loader.
c) Discuss the working principle of relocation linker.
d) Why is relocation needed ? 5 + 5 + 4 + 1 6301 5 [ Turn over
9. a) What are the advantages and disadvantages of NIS
server ?
b) What are the packages needed to install NIS server and client ?
. , ' ' . ' . ' '
c) Explain in detail of netstat command, t
d) Configure the NFS server with the following requirements :
Machine 192.168.1.20 is able to mount/home/test directoiy of the server ( 192.168.1.10 ) in read-only mode. Machine 192.168.1.21 is able to mount /home/test directoiy of the server ( 192.168.1.10 ) in read/write mode. The range of machines (192.168.1.64 -192.168.1.128) is able to mount/home directoiy in read/write mode. $ + 4 + 3 + 5
10. a) Configure the firewall using iptables as follows :
Machine will receive all incoming icmp packets ( only echo-request ) from any source. It will reject all outgoing TCP connections to 2 particular destination. It will only receive ftp connection from a specific machine. Show the final configuration of each available chain.
b) What is the use of IP Accounting facility ? Write the . general sjmtax for tpfwadm, ipehains and iptables commands for IP Accounting. 6 + ( 3 + 6 )
11. a) What is the role of ah assembler ? Give the step of general design procedure of assembler. 2 + 3
b) What is the working principle of FTP ? 5
c) Answer the following: ' 5 x1
. . '. *
ft What is daemon ?
ifl What happen if we write init 0 in the prompt and
- press enter ?
til) What is an I-node ?
iv) What is the port of FTP ?
v) What is port of HTTP ?
6301
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