Operating System Architecture Set 2 MCQs

Q1 | Programs like shell and editors (ed and vi) interact with the kernal by invoking

system calls

systems hardware

n/w program

interfacing hardware

Q2 | Internal or external command is checked using

ls

tty

etc

type

Q3 | The standard name for executable files produced by c compiler is

b.out

c.out

a.out

d.out

Q4 | script is run for successful login

/etc/profile

/etc/str

/etc/strtms

/etc/.conf

Q5 | The root node in the file system is write as

/

\\

/..

../

Q6 | interacts with inner part of kernel

interface

shell

terminal

compiler

Q7 | is used to stop a process

kill

remove

clear

overt

Q8 | directory attributes are displayed by

ls-l-a

ls-l-b

ls-l-c

ls-l-d

Q9 | The x in the cat x command is

binary file

data file

text file

source file

Q10 | what is the run level for shut down and reboot respectively

0 and 6

1 and 6

0 and 4

1 and 4

Q11 | The text formatting program traff

expects to find new line character at the end of each line of text

expects to find last character at the end of each line of text

expects to find each line of text

expects to neglect each line of text

Q12 | The system acctcom accounting program

expects to find variable length records

expects to find fixed length record

expects to sort the records

expects to merge the records

Q13 | permission to access the file is controlled by

n/w structure

directory structure

access permissions

file structure

Q14 | To the user,the unix system treats devices as if they are

devices

interfaces

hardware

files

Q15 | Two invocations copy copy.c newcopy.c copy copy newcopy

1st is carrect

2nd is carrect

both carrect

both wrong

Q16 | In processing environment of unix

a program is an executable file and process is an instance of the program in execution

a process is an executable file and program is a instance of the process in execution

a process and program are both same

all above are carrect

Q17 | The fork system call

creates a new program

creates a new interface

creates a new hardware

creates a new process

Q18 | What command do you have to use to go to parent directory

cd-,

cd -

cd/up

cd..

Q19 | The command used to display a specified file

mkdir

chmod

cat

compress

Q20 | root in unix system is represented by

%

\\

$

/

Q21 | what does cd.. Do ?

not a valid unix command

logs out of the computer

changes the working directory to login directory

" " " " " the parent of current working directory

Q22 | What does command LS do

opening a file

display contents of a file

display of file & folders, present in the folder where you are

shows a calender

Q23 | Why is PWD used

show current user

show present working directory

to display error messages

to copy files

Q24 | Which is the carrect command to list files& folders in unix

list

ls

dir

list files

Q25 | How can you display a list of files including hidden files

find all

ls-a

ls-b

all answers a,b,c