Unix Operating System Set 2 MCQs

Q1 | The command cal j 1997 would give the output as

the calendar of jan, june and july 1997

only calendar of jan 1997

an error

none of the above

Q2 | The output of command banner “Unix shell programming” would be

a banner showing ‘unix’,’shell’ and ‘programming’ words displayed in separate lines

a banner showing ‘unix shell’ in one single line

nothing

a banner showing ‘unix shell programming’ in one line.

Q3 | To see the last access time of various files in a file system the command is

is-iu

is-i

is-acc

is-mt

Q4 | To ascertain what are the contents of the file in your the system the best way would be

do a cat command on each file and find its contents

use the command cat*

use the command file*

none of the above

Q5 | Which of these is not a command of Unix related with DOS

dosdir a:proj

doscopy trial a:/

doscp/home/proj/prg a:/

dosls

Q6 | Which of following commands do not belong to multiple file editing commands

:n!

:q!

:rnew!

all the above

Q7 | The difference between the commands ps –e and ps –a is

ps –e gives details of every process running in memory whereas ps –a gives output for all the process that you have launched

ps –e gives details of every process running in memory whereas ps –a gives details of all user processes

no difference , both give same output

none of the above

Q8 | The father of all processes is

root

sh

sched

init

Q9 | The process id numbers of the processes vhand,bdflush,sched and init are

1,2,3 and 4

2,3,0 and 1

3,4,1 and 2

0,1,2 and 3

Q10 | Which of the following is not true regarding the command $ nohup cat *.let | nohup sort >f1 &

the process would die if the user logs out before the command’s execution is over

if the user logs out the output of sort would be dtored in a file nohup.out

it is optional to give nohup before sort

this background process is also known as a deamon process

Q11 | Which of the following is not true regards the kill command

super user can kill deamon processes

for sure kill the signal no is 9

there is no surety that the shell process will get killed by the command kill

using kill command you can kill other user’s processes too

Q12 | Which of the following is not true

the at command permits you to receive messages only by mail

a person’s login name appears in the file at.allow if he is not allowed to use the at command

both are false

both are true

Q13 | For a person to receive messages he should have his terminal set to a parameter which will allow him receive messages.The command to set this parameter is

message –on

msg –o

mesg –y

message–y

Q14 | If the user has read a news item he cannot read it again because of creation of the file

_news_time

news.time

.news.time

.news_time

Q15 | To read the stale news the option available is

news –a

delete the file /usr/news

delete the file _news.time

delete the file .news_time

Q16 | The message of the day is stored in a file called

/etc/profile

/etc/motv

.profile

autoexec.bat

Q17 | The incoming mail of user with the login name aa12 is stored in the file

/usr/spool/mail/aa12

/usr/aa12/mbox

/spool/mail/aa12

/usr/aa12/.mbox

Q18 | .mailrc is the file

which stores the incoming mail

which is used to type the mail to be sent

which is invoked when the mail command is executed

which permits you to customize the vi environment

Q19 | The escape sequence \033[4m is used to

underlying characters

mark them as bold

display them in reverse video

none of the above

Q20 | Which of the following assignments is illegal

a=’ls’

b=’ls –l’

c=’1972’

d=’who | grepaal’

Q21 | Which of the following assignment is illegal

a=’cat file’

a=100 b=50

age=25

all the above

Q22 | A null variable a can be created using

a=

a=’’

a=””

all the above

Q23 | The shell metacharacter $# represents

total number of arguments supplied to the shell script

total number of files in the current directory

total number of users who have logged in

total number of processes running in the background

Q24 | When we are executing a shell script the shell acts as

an interpreter

a compiler

an operating system

none of the above