Operating System Architecture Set 17 MCQs

Q1 | The administrative information of a file is stored in

vnode

dnode

inode

snode

Q2 | The -t option to ls is used for

sort according to time

sor according to date

sort according to name

sort according to size

Q3 | The systems internal name to file is

id

i-number

pid

pid_t

Q4 | The first tow bytes in each directory entry are

connection between id and name

connection between name of file and its contents

connection between if and its contents

connection betweeen id and contents

Q5 | The rm command removes

directory entries

removes inodes

removes names

removes files

Q6 | primary parts oc c comipler is in

/dev

/lib

/bin

/etc

Q7 | The basic program such as who and ed resids in

/dev

/lib

/bin

/etc

Q8 | various administrative fils such as password file in

/dev

/lib

/bin

/etc

Q9 | Short lived files created during execution are stored in

/tmp

/lib

/bin

/etc

Q10 | which of following features of UNIX may be used for IPC

signals

ipes

semaphores

all of these

Q11 | In a system 5 peole are currently using VI editor, then no. of currosonding rocesses will be

1

5

2

Q12 | the command echo welcome >/dev/tty

echoes welcome in all the gtermonals that are switched on

echoes welcome in all the terminals which are logged on

echoes welcomes only in terminal in which it is run

a&c

Q13 | dev/nul

it is a file

has write operation for all

built in dest bin

all of these

Q14 | The advantage of binary files over text file is

it is compact

it can be accessed faster.

they are more reliable

all of these

Q15 | UNIX uses ls to list files in a directory. The corresponding command in MS environment is

lf

listdir

dir

none of these

Q16 | For some file the access permissions are modified to 764. Which of the following interpretation is valid:

every one can read, group can execute only and the owner can read and write.

every one can read and write, but owner alone can execute.

every one can read, group including owner can write, owner alone can execute

none of these

Q17 | Which directory under the root contains the information on devices

/usr/bin

/dev

/usr/peripherals/de v

/etc/dev

Q18 | Which option makes the command to ask the user for confirmation before removing each file

rm-i

rm-r

rm-f

rm-rf

Q19 | which opttion deletes all files in the current directory and all its subdirectories

rm-i

rm-r

rm-f

rm-rf

Q20 | which option is used for forcing removal operation

rm-i

rm-r

rm-f

rm-rf

Q21 | which option in used for deleting everything in current directory and below.

rm-i

rm-r

rm-f

rm-rf

Q22 | which command is used for renaming a file

mv

cp

rm

cv

Q23 | which command is used for displaying contents of a file

mv

cp

rm

cv

Q24 | which command is used for copying a file

mv

cp

rm

cv

Q25 | Which command is used to determine a type of file

infile

file

wc

cp