unix MCQ

(1)

Set1:

1.Which of the following is used for matching patterns in regular expression? Select an answer

A. ^ B. > C. < D. $

2.In UNIX, fork is a system call that creates a new pcb. Select an answer

A. TRUE B. FALSE

3.File name is case sensitive. Select an answer

A. TRUE B. FALSE

4.Every Command does not have all sections. Select an answer

A. TRUE B. FALSE

5.Which of the following is not the filter command? (Please select ALL that apply)

Select an answer A. Head B. Grep C. :w D. Ex E. Uniq

6.The agency that sits between the user and the UNIX system is called the: Select an answer

A. Logic B. Profile C. Shell D. Erxc

7.intalphasort(const void *a, const void *b) is a valid function. Select an answer

A. TRUE B. FALSE

8.A file is a collection of data. Select an answer

A. TRUE B. FALSE

9.Which symbol is used to specify a group of character? Select an answer

A. () B. {} C. [] D. <>

10.Simple form of synchronization between parent and child.int wait (int * statloc ); Select an answer

A. TRUE B. FALSE 11.Open() is a:

(2)

Select an answer A. Specific class B. General Class C. System call

D. None of the options are correct 12.How many types of links are there? Select an answer

A. 1 B. 2 C. 3 D. 4

13.Command for System Load Average is: Select an answer

A. Time B. Prof C. Uptime D. Top

14.A link is a pointer reference to another file. Select an answer

A. TRUE B. FALSE

15.Which symbol is used for output redirection operator? Select an answer

A. > B. < C. >> D. <<

16.We can redirect the error messages to alternate location using the error redirection operator. Select an answer

A. TRUE B. FALSE

17.The file limit for UNIX, LINUX is up to 255 characters. Select an answer

A. TRUE B. FALSE

18.Which of the following options will be used to display number of blocks used by a file? Select an answer

A. -c B. -i C. -d D. -s

19.Regular expressions allow matching and manipulation of textual data. Select an answer

A. TRUE B. FALSE

20.creat() stands for: Select an answer A. Open

B. Input C. Output D. Create

(3)

software interrupts, to allocate memory, and to do other useful jobs for a process. Select an answer

A. TRUE B. FALSE

22.What does date command print? Select an answer

A. Login date B. Log out date C. System date

D. None of the options are correct 23.ls and find are:

Select an answer A. Directories B. Commands

C. Both Directories and Commands D. None of the options are correct

24.Find command is used to search files in specified directory Select an answer

A. TRUE B. FALSE

25.fork() does not creates a new copy of the signal table for the new process. Select an answer

A. TRUE B. FALSE

26.-mtime n operator is used for search files which were modified 24 hours ago. Select an answer

A. TRUE B. FALSE

27.int alphasort (const void *a, const void *b) is a valid function. Select an answer

A. TRUE B. FALSE

28.Which command will be used with vi editor to insert text to left of cursor? Select an answer

A. S B. S C. A D. I

29.ps command shows a combination of information from the process table and the user area. Select an answer

A. TRUE B. FALSE

30.The Kernel communicates with the hardware in machine language. Select an answer

A. TRUE B. FALSE

31.A system composed of a set of instruction for a given object-desk is called: Select an answer

A. Program B. Information C. Technology

(4)

32.How to get date information into day variable in Bourne shell? Select an answer A. day='date' B. day='date' C. day="date" D. day=date

33.The output of the command "echo hello | wc -c" is:here Select an answer

A. bash: echo: command not found B. 4

C. 5 D. 6

34.How to remove blank lines from a file in an editor? Select an answer

A. Esc del B. Esc dd C. Esc :dd D. Esc d

35.How do you create a new file using vi? Select an answer

A. new filename B. vi filename C. touch

D. cat>filename

36.Which option will be used with ps command to slow the entire command line of the process being run? Select an answer A. -4 B. -f C. -1 D. -4

37.Which symbol is used for merging the standard error message to the same output file? Select an answer

A. > B. & C. &&

D. None of the options are correct

38.Choose the valid command to a add user. Select an answer

A. adduser username B. add username C. user username

39.Which are types of storage for file format? Select an answer

A. Directories B. Data C. Program

D. All the options are correct

40.What is the primary job of the shell? Select an answer

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B. The core of the operating system

C. Interpreter between applications and the OS D. Shell programming

41.Which is the default shell in UNIX? Select an answer

A. Bash B. Ksh C. Csh D. Sh

42.The process table is located in kernel memory and cannot be swapped out. Each entry contains: Select an answer

A. PID B. User ID C. State

43.Which command is used to remove a file? Select an answer

A. Remove B. Rm C. Mv D. Del

44.Memory allocation by which the program is subdivided into equal portions is called _____. Select an answer

A. Paging B. Partitioning C. Fetching D. Blocking

45.While working with mail command, which command is used to save mail i a separate file? Select an answer

A. S B. R C. W D. D

46.Which are the types of storage for file format? Select an answer

47.Processor substitutes the definition for all occurrences of the abbreviation in the program is called:

Select an answer A. Program Call B. Macro Call C. Substitutes

48.Command used to delete 10 lines from the current line is: Select an answer

A. 10dd B. 10d C. 10dl

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49.cat< file1 >file2 2> err.log what is the output of the command? Select an answer

A. Concates file1 and file2 , if any error stored to "err.log" file B. Concates file1 and file2 , if any error displayed on console

C. Contents of file1 is stored under file2, if any error stored to "err.log" file D. None of the options are correct

50.Command used to display output of a command line by line is: Select an answer

A. More file name B. Less file name

C. Both more and less file name D. None of the options are correct

51.In the output of ls -l if the first character is an s the file type is: Select an answer

A. Symbolic link B. Socket special file C. Block special file D. Character special file

52.The group of the file and the group of the directory is always the same for all new files created when:

Select an answer

A. The set userid is set on the directory B. The set group id is set

C. The sticky bit is set on the directory

D. The user belongs to a different group as that of the file 53.How do we display the last second line of a file? Select an answer

54.The process table is located in kernel memory and cannot be swapped out. Each entry contains: Select an answer

55.catemp.lst | sort | tee temp | uniq | cut d " " f2 What is the output of the file temp?

Select an answer

A. Unsorted contents of emp.lst B. Error in piping

C. Sorted contents of emp.lst D. None of the options are correct

56.Which of the following commands will show the current run level? Select an answer

A. boot -l B. who -b C. uptime D. who -r

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programmers to define an abbreviation in his program. Select an answer

A. System Programming B. Macros

C. Shell Scripting

D. Advanced Shell scripting

58.Which is the valid command to copy a file from /root directory to current directory? Select an answer

A. cp / root / filename

B. cp / root / filename $HOME

C. cp / root.filename / usr /username /current D. None of the options are correct

59.Choose a valid Logical Test expression to check a non-numeric value with another value. Select an answer

A. if test $v1 eq $ v2 B. if $v1 = $v2 C. if test $v1 = $v2 D. if test $v1 == $v2

60.The Octal number to be given along with chmod command to make a file readable, writable, and executable to the owner, readable and executable to group and others is:

Select an answer A. 0

B. 755 C. 744

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set 2 :

Which of the following is not involved with system programming? Select an answer

A. I/o Processors B. CPU

C. Printer D

D. All the options are correct A "." matches multiple characters. Select an answer

A. TRUE B. FALSE B

int alphasort (const void *a, const void *b) is a valid function. Select an answer

A. TRUE A B. FALSE

More command is used to display text in the terminal screen. Select an answer

A. TRUE A B. FALSE

Find command is used to search files in specified directory Select an answer

A. TRUE A B. FALSE

We can redirect the error messages to alternate location using the error redirection operator. Select an answer

A. TRUE A B. FALSE

The default integer value of standard error file is: Select an answer

A. 1 B. 2 C. 4 D. 0 B

The file limit for UNIX, LINUX is up to 255 characters. Select an answer

A. TRUE A B. FALSE

The engine of UNIX is: Select an answer A. The Shell B. Command C. The kernel C

D. None of the options are correct File name is case sensitive. Select an answer

A. TRUE B. FALSE B creat() stands for: Select an answer A. Open

B. Input C. Output

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D. Create D

Which symbol is used to specify a group of character? Select an answer

A. () B. {} B C. [] D. <>

The UNIX system provides several system calls to create and end program, to send and receive software interrupts, to allocate memory, and to do other useful jobs for a process.

Select an answer A. TRUE A B. FALSE

Which of the following commands is used to obtain a list of all files by modification time? Select an answer

A. ls -1 B. ls-t C. ls-i C D. ls-R

How many types of commands is mainly used in UNIX? Select an answer

A. 2 B. 3 B C. 4 D. 5

-mtime n operator is used for search files which were modified 24 hours ago. Select an answer

A. TRUE B. FALSE B

Command for changing permissions is: Select an answer

A. Chmod A B. Chgrp C. Cat D. Cd

Kernel is loaded into memory when the system boots. Select an answer

A. TRUE A B. FALSE

The Kernel communicates with the hardware in machine language. Select an answer

A. TRUE A B. FALSE

Every Command does not have all sections. Select an answer

A. TRUE A B. FALSE

alphasort() and versionsort() functions are used as the comparison function. Select an answer

A. TRUE A B. FALSE

Regular expressions allow matching and manipulation of textual data. Select an answer

(10)

A. TRUE A B. FALSE

fork() does not creates a new copy of the signal table for the new process. Select an answer

A. TRUE B. FALSE B

Which command will be used with vi editor to insert text to left of cursor? Select an answer

A. S B. S C. A D. I D

Which command is used to remove a directory? Select an answer

A. Rd B. Rmdir B C. Dldir D. Rdir

A link is a pointer reference to another file. Select an answer

A. TRUE A B. FALSE

Which command list hidden files? Select an answer

A. ls-l B. ls-a B C. ls-h D. ls-If

Which of the following options will be used to display number of blocks used by a file? Select an answer

A. -c B. -i B C. -d D. -s

Which symbol is used for output redirection operator? Select an answer

A. > A B. < C. >> D. <<

Which is communicating between kernel and user interface? Select an answer

A. The Shell A B. Operating System C. Commands

Choose the valid command to a add user. Select an answer

A. adduser username A B. add username C. user username

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The filed separator in cut command is specified with: Select an answer A. -a option B. -d option B C. -r option D. -x option

Which command is used to upload filename from local machine to remote machine? Select an answer

A. Mput A B. get filename C. put filename D. mput file list What will rm -rf * do? Select an answer A. Removes all files B. Removes all directories

C. Removes all files and directories in a directory c D. Gives error

The parenthesis are a feature used for: Select an answer

A. Command Substitution B. Command evaluation C. Sub Shell

D. None of the options are correct Which is a super-user prompt? Select an answer

A. $ A B. % C. # D. *

The > operator is used for: Select an answer

A. Comparison of two numbers B. Input Redirection

C. Output Redirection C D. Piping

Default Link for a directory is: Select an answer

A. Two B. One B C. Three D. None

Which of the following is not involved with the system programming? Select an answer

A. I/O Processors B. CPU

C. Printer c

Which command is used to count just the number of characters in a file? Select an answer

A. wc- 1 B. wc-c c

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C. wc-w D. wc-r

The task of adjusting programs so they may be placed in arbitrary core locations in called: Select an answer

A. Loader B. Allocation C. Relocation D. Macros

Which of the following commands is used to update access and modification times of a file? Select an answer

A. Grep B. Wc C. Touch c D. Cat

Signal for system calls is: Select an answer

A. Signal B. Kill C. Alarm

Which symbol is used for input redirection operator? Select an answer

A. > B. < B C. >> D. <<

To execute a Bourne shell script in the current directory which doesn't have execute permission, command is:

Select an answer

A. chmodu+xscriptfile; ./sctriptfile A B. shscriptfile

C. bash; shscriptfilename

D. chmodu+xscriptfile; bash sctriptfile

The process table is located in kernel memory and cannot be swapped out. Each entry contains: Select an answer

A. PID B. User ID C. State C

D. All the options are correct File Attribute mainly contains: Select an answer

A. File name B. An owner name C. Access rights

D. All the options are correct D

Equivalent command for find . -name "*.dat" -ok rm {} \; Select an answer

A. find . -name "*.dat" -exec rm -i {} \; B. rm *.dat

C. erase *.dat all D. None

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Select an answer A. Reading B. Adding C. Deleting

Choose a valid Logical Test expression to check a non-numeric value with another value. Select an answer

A. if test $v1 eq $ v2 A B. if $v1 = $v2

C. if test $v1 = $v2 D. if test $v1 == $v2

The group of the file and the group of the directory is always the same for all new files created when:

Select an answer

C. The sticky bit is set on the directory C

D. The user belongs to a different group as that of the file Types of file access rights are:

Select an answer A. Read access (r) B. Write access (w) C. Execute access (x)

catemp.lst | sort | tee temp | uniq | cut d " " f2 What is the output of the file temp?

Select an answer

C. Sorted contents of emp.lst C D. None of the options are correct cat one.txt two.txt>>three.txt what is the output of the command? Select an answer

A. Appends three.txt contents with one.txt and two.txt A B. Displays one.txt two.txt and three.txt

C. Error in Redirection

Which of the following commands will show the current run level? Select an answer

A. boot -l B. who -b C. uptime c D. who -r

Only a few system calls are needed to implement process control in UNIX. They are: Select an answer

A. Ls B. intgetpid C. Ls only D. intgetpid only

E. Both Ls and intgetpid E F. None of options are correct

(14)

Virtual memory is best defined for: Select an answer

A. A Memory consisting of those addresses that may be generated by a processor during execution of a computation

B. The memory space consists of the set of addresses that corresponded to physical location

C. The technique of segmentation provides a large name space and a good protection mechanism

D. All the options are correct D cat< file1 >file2 2> err.log

what is the output of the command? Select an answer

A. Concates file1 and file2 , if any error stored to "err.log" file A B. Concates file1 and file2 , if any error displayed on console

C. Contents of file1 is stored under file2, if any error stored to "err.log" file D. None of the options are correct

Which is the valid command to display all the files with size 100 to 399 bytes occupied? Select an answer

C. ls |cut -d" " -f1-5,9 | grep -w "[0-3][0-9][0-9]" D. None of the options are correct

A program that places program into memory and also prepares them for execution is called: Select an answer

A. Loader A B. Compiler C. Interpreter

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set 3 :

Question: 1 of 60 lt043979enQ0015

How many types of links are there? Select an answer A. 1 B. 2----C. 3 D. 4 Question: 2 of 60 lt043979enQ0042 ls and find are: Select an answer A. Directories B.

Commands----C. Both Directories and Commands D. None of the options are correct Question: 3 of 60

lt043979enQ0007

A. TRUE----B. FALSE Question: 4 of 60 lt043979enQ0010

How many types of commands is mainly used in UNIX? Select an answer A. 2 B. 3---C. 4 D. 5 Question: 5 of 60 lt043979enQ0003

File name is case sensitive. Select an answer

A. TRUE----B. FALSE Question: 6 of 60 lt043979enQ0023

Command for System Load Average is: Select an answer A. Time B. Prof C. Uptime---D. Top Question: 7 of 60 lt043979enQ0019 Open() is a: Select an answer A. Specific class B. General Class C. System

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call----D. None of the options are correct Question: 8 of 60

lt043979enQ0047

Which of the following is used for matching patterns in regular expression? Select an answer A. ^ B. >---C. <---D. $ Question: 9 of 60 lt043979enQ0027

A. TRUE B. FALSE----Question: 10 of 60 lt043979enQ0032

Which of the following commands is used to obtain a list of all files by modification time? Select an answer A. ls -1 B. ls-t---C. ls-i D. ls-R Question: 11 of 60 lt043979enQ0037

A. The Shell

B. Operating System---C. Commands

D. None of the options are correct Question: 12 of 60

lt043979enQ0017

Which command is used to remove a directory? Select an answer A. Rd B. Rmdir---C. Dldir D. RdirQuestion: 13 of 60 lt043979enQ0014

Which command list hidden files? Select an answer A. ls-l B. ls-a---C. ls-h D. ls-If Question: 14 of 60 lt043979enQ0008

A. >---B. <

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C. >> D. <<

C.

Printer---D. All the options are correct Question: 16 of 60

lt043979enQ0038

A file is a collection of data. Select an answer

A. TRUE---B. FALSE

What does date command print? Select an answer

A. Login date B. Log out date C. System

date---D. None of the options are correct Question: 18 of 60

lt043979enQ0018 creat() stands for: Select an answer A. Open B. Input C. Output D. Create----Question: 19 of 60 lt043979enQ0024

Select an answer A. TRUE----B. FALSE

A. TRUE----B. FALSE

Which option is used with rm command to make the command prompt the user with each filename and a ?, before acting on it?

Select an answer A. -r

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C. -i---D. -1

The role of assemblers is a basic machine that passes through a program. Select an answer

A. TRUE----B. FALSE

A "." matches multiple characters. Select an answer

A. TRUE B. FALSE----Question: 24 of 60 lt043979enQ0006

A. TRUE---B. FALSE

Which command will be used with vi editor to insert text to left of cursor? Select an answer A. S B. S C. A D. I---Question: 26 of 60 lt043979enQ0009

The default integer value of standard error file is: Select an answer A. 1 B. 2----C. 4 D. 0 Question: 27 of 60 lt043979enQ0020

unlink and rm does the same to a file. Select an answer

A. TRUE----B. FALSE

A. TRUE---B. FALSE

Question: 29 of 60 lt043979enQ0036 The engine of UNIX is: Select an answer

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A. The Shell----B. Command C. The kernel

lt043979enQ0035

A. TRUE---B. FALSE

What does the Pipe ( | ) do? Select an answer

A. Takes the output of a command and logs it

B. Take the output of one command and displays it to the screen

C. Takes the output of one command and passes it as the input into a following command---D. Takes the output & sends to user

Question: 32 of 60 lt043979enQ0179 What is a File system? Select an answer

A. A hierarchy of directories and subdirectories B. The core of the operating system

C. A hierarchy of directories, subdirectories, and files--D. Group of files

Which command is used to set the positional parameters? Select an answer A. Set--B. Env C. Is D. Echo Question: 34 of 60 lt043979enQ0077

Choose a valid Logical Test expression to check a non-numeric value with another value. Select an answer A. if test $v1 eq $ v2---B. if $v1 = $v2 C. if test $v1 = $v2 D. if test $v1 == $v2 Question: 35 of 60 lt043979enQ0192

Which command will display what users are currently logged into the system? Select an answer A. id -a B. last C. whodo D. who---Question: 36 of 60 lt043979enQ0110

Which are the types of storage for file format? Select an answer

(20)

D. All the options are correct---Question: 37 of 60

lt043979enQ0173

The files which are open by default for each and every process are: Select an answer

A. Stdin--B. Stdout C. Stderr

D. All the options are correct E. None of the options are correct Question: 37 of 60

lt043979enQ0173

A. Stdin B. Stdout C. Stderr

lt043979enQ0073

A. adduser username---B. add username C. user username

lt043979enQ0201

A. adduser username---B. add username C. user username

lt043979enQ0200

What is the echo command used for? Select an answer

A. Display text or

variables---B. Used to repeat a command more than once C. Displays text twice

D. To echo the input Question: 41 of 60 lt043979enQ0056

Which command is used to display the characteristics of a process? Select an answer

A. Pid B. Du

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C. Ps---D. Au

A directory contains .c files which have to be compressed. Which is the valid command to compress them?

Select an answer A. gzip *.c B. gzip -d *.c

c. compress *.c cporg.gz----D. None of the options are correct Question: 43 of 60

lt043979enQ0175

Which command is used while finding out the type of file based on the contents of the file? Select an answer

A. find B. chmod C.

File--D. None of the options are correct Question: 44 of 60

lt043979enQ0190 UNIX is a:

Select an answer

A. Multiuser, multitasking OS---B. Multiuser, single tasking OS C. Single user, multitasking OS D. Single user, single tasking OS Question: 45 of 60

lt043979enQ0119

Which of the following special shell variables is used to process number of the last background job? Select an answer A. $!---B. $# C. 0 D. $* Question: 46 of 60 lt043979enQ0096

Which of the following commands is used to display your working directory? Select an answer A. Dir B. prompt $p$g C. pwd D. path---Question: 47 of 60 lt043979enQ0128

To Save and exit the vi editor, colon command used is: Select an answer A. :wq---B. :sq C. :se D. :q! Question: 48 of 60

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lt043979enQ0117

Which of the following commands is used to list contents of directories? Select an answer A. Ls---B. Lp C. Dir D. Tar Question: 49 of 60 lt043979enQ0220

Wild card will extract of the requested information as per the input details like: Select an answer

A. Reading B. Adding C. Deleting

D. All the options are correct----Question: 50 of 60

lt043979enQ0215

In the output of ls -l if the first character is an s the file type is: Select an answer

A. Symbolic link B. Socket special file---C. Block special file D. Character special file Question: 51 of 60 lt043979enQ0224

The features of UNIX are: Select an answer

A. Multitasking B. Interactive C. Portable

D. All the options are correct---Question: 52 of 60

lt043979enQ0217

E. Both Ls and intgetpid---F. None of options are correct Question: 53 of 60

lt043979enQ0211

How do we display the last second line of a file? Select an answer

A. tail -2 filename | head 1

B. cat filename | tail -3 | head -1----C. tail +2 filename | head -1 | tail 1 D. None of the options are correct Question: 54 of 60

lt043979enQ0221

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Select an answer A. Loader=---B. Compiler C. Interpreter

lt043979enQ0229

A. PID B. User ID C.

State----D. All the options are correct Question: 56 of 60

lt043979enQ0225

Types of file access rights are: Select an answer

A. Read access (r) B. Write access (w) C. Execute access (x)

D. All the options are correct----Question: 57 of 60

lt043979enQ0216

Select an answer

C. The sticky bit is set on the

directory----D. The user belongs to a different group as that of the file Question: 58 of 60

lt043979enQ0207

Which is the valid command to copy a file from /root directory to current directory? Select an answer

C. cp / root.filename / usr /username /current---D. None of the options are correct

cat one.txt two.txt>>three.txt what is the output of the command? Select an answer

A. Appends three.txt contents with one.txt and two.txt---B. Displays one.txt two.txt and three.txt

lt043979enQ0214

A. if test $v1 eq $ v2---B. if $v1 = $v2

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D. if test $v1 == $v2 DI.

(25)

set 4 :

How many types of links are there? Select an answer A. 1 B. 2 C. 3 D. 4 Question: 2 of 60 lt043979enQ0042 ls and find are: Select an answer A. Directories B. Commands

C. Both Directories and Commands D. None of the options are correct Question: 3 of 60

lt043979enQ0007

A. TRUE B. FALSE Question: 4 of 60 lt043979enQ0010

How many types of commands is mainly used in UNIX? Select an answer A. 2 B. 3 C. 4 D. 5 Question: 5 of 60 lt043979enQ0003

File name is case sensitive. Select an answer

A. TRUE B. FALSE Question: 6 of 60 lt043979enQ0023

Command for System Load Average is: Select an answer A. Time B. Prof C. Uptime D. Top Question: 7 of 60 lt043979enQ0019 Open() is a: Select an answer A. Specific class B. General Class C. System call

(26)

lt043979enQ0047

Which of the following is used for matching patterns in regular expression? Select an answer A. ^ B. > C. < D. $ Question: 9 of 60 lt043979enQ0027

A. TRUE B. FALSE

Which of the following commands is used to obtain a list of all files by modification time? Select an answer A. ls -1 B. ls-t C. ls-i D. ls-R Question: 11 of 60 lt043979enQ0037

A. The Shell

B. Operating System C. Commands

lt043979enQ0017

Which command is used to remove a directory? Select an answer A. Rd B. Rmdir C. Dldir D. RdirQuestion: 13 of 60 lt043979enQ0014

Which command list hidden files? Select an answer A. ls-l B. ls-a C. ls-h D. ls-If Question: 14 of 60 lt043979enQ0008

A. > B. <

(27)

C. >> D. <<

C. Printer

D. All the options are correct Question: 16 of 60

lt043979enQ0038

A file is a collection of data. Select an answer

A. TRUE B. FALSE

What does date command print? Select an answer

A. Login date B. Log out date C. System date

lt043979enQ0018 creat() stands for: Select an answer A. Open B. Input C. Output D. Create Question: 19 of 60 lt043979enQ0024

Select an answer A. TRUE

B. FALSE

A. TRUE B. FALSE

Select an answer A. -r

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C. -i D. -1

A. TRUE B. FALSE

Which command will be used with vi editor to insert text to left of cursor? Select an answer A. S B. S C. A D. I Question: 26 of 60 lt043979enQ0009

The default integer value of standard error file is: Select an answer A. 1 B. 2 C. 4 D. 0 Question: 27 of 60 lt043979enQ0020

A. TRUE B. FALSE

Question: 29 of 60 lt043979enQ0036 The engine of UNIX is: Select an answer

(29)

A. The Shell B. Command C. The kernel

lt043979enQ0035

A. TRUE B. FALSE

C. Takes the output of one command and passes it as the input into a following command

D. Takes the output & sends to user Question: 32 of 60

lt043979enQ0179 What is a File system? Select an answer

A. A hierarchy of directories and subdirectories B. The core of the operating system

C. A hierarchy of directories, subdirectories, and files D. Group of files

Which command is used to set the positional parameters? Select an answer A. Set B. Env C. Is D. Echo Question: 34 of 60 lt043979enQ0077

Choose a valid Logical Test expression to check a non-numeric value with another value. Select an answer A. if test $v1 eq $ v2 B. if $v1 = $v2 C. if test $v1 = $v2 D. if test $v1 == $v2 Question: 35 of 60 lt043979enQ0192

Which command will display what users are currently logged into the system? Select an answer A. id -a B. last C. whodo D. who Question: 36 of 60 lt043979enQ0110

(30)

Select an answer A. Directories B. Data C. Program

lt043979enQ0173

lt043979enQ0073

lt043979enQ0201

lt043979enQ0200

A. Display text or variables

B. Used to repeat a command more than once C. Displays text twice

D. To echo the input Question: 41 of 60 lt043979enQ0056

Which command is used to display the characteristics of a process? Select an answer

(31)

B. Du C. Ps D. Au

C. compress *.c cporg.gz

lt043979enQ0175

Which command is used while finding out the type of file based on the contents of the file? Select an answer

A. find B. chmod C. File

lt043979enQ0190 UNIX is a:

Select an answer

A. Multiuser, multitasking OS B. Multiuser, single tasking OS C. Single user, multitasking OS D. Single user, single tasking OS Question: 45 of 60

lt043979enQ0119

Which of the following special shell variables is used to process number of the last background job? Select an answer A. $! B. $# C. 0 D. $* Question: 46 of 60 lt043979enQ0096

Which of the following commands is used to display your working directory? Select an answer A. Dir B. prompt $p$g C. pwd D. path Question: 47 of 60 lt043979enQ0128

To Save and exit the vi editor, colon command used is: Select an answer

A. :wq B. :sq C. :se D. :q!

(32)

Which of the following commands is used to list contents of directories? Select an answer A. Ls B. Lp C. Dir D. Tar Question: 49 of 60 lt043979enQ0220

Wild card will extract of the requested information as per the input details like: Select an answer

A. Reading B. Adding C. Deleting

lt043979enQ0215

A. Symbolic link B. Socket special file C. Block special file D. Character special file Question: 51 of 60 lt043979enQ0224

The features of UNIX are: Select an answer

A. Multitasking B. Interactive C. Portable

lt043979enQ0217

E. Both Ls and intgetpid F. None of options are correct Question: 53 of 60

lt043979enQ0211

(33)

A program that places program into memory and also prepares them for execution is called: Select an answer

A. Loader B. Compiler C. Interpreter

lt043979enQ0229

lt043979enQ0225

A. Read access (r) B. Write access (w) C. Execute access (x)

lt043979enQ0216

Select an answer

C. The sticky bit is set on the directory

D. The user belongs to a different group as that of the file Question: 58 of 60

lt043979enQ0207

C. cp / root.filename / usr /username /current D. None of the options are correct

cat one.txt two.txt>>three.txt what is the output of the command? Select an answer

A. Appends three.txt contents with one.txt and two.txt B. Displays one.txt two.txt and three.txt

lt043979enQ0214

A. if test $v1 eq $ v2 B. if $v1 = $v2

(34)

C. if test $v1 = $v2 D. if test $v1 == $v2

(35)

set 5 :

-mtime n operator is used for search files which were modified 24 hours ago. Select an answer

A. TRUE ---B. FALSE

Regular expressions allow matching and manipulation of textual data. Select an answer

A. TRUE ---B. FALSE

More command is used to display text in the terminal screen. Select an answer

A. TRUE ---B. FALSE

int alphasort (const void *a, const void *b) is a valid function. Select an answer

A. TRUE ---B. FALSE

Question: 5 of 60

A. The Shell ---B. Operating System C. Commands

D. None of the options are correc Question: 6 of 60

In UNIX, fork is a system call that creates a new pcb. Select an answer

A. TRUE ---B. FALSE

Question: 7 of 60

A. TRUE

B. FALSE ---Question: 8 of 60 lt043979enQ0026

ps command shows a combination of information from the process table and the user area. Select an answer A. TRUE ---B. FALSE Question: 9 of 60 Open() is a: Select an answer A. Specific class B. General Class C. System call

---D. None of the options are correct Question: 10 of 60

lt043979enQ0028

The agency that sits between the user and the UNIX system is called the: Select an answer

(36)

B. Profile

C. Shell ---D. Erxc

Question: 11 of 60

Which of the following commands is used to obtain a list of all files by modification time? Select an answer A. ls -1 B. ls-t ---C. ls-i D. ls-R Question: 12 of 60

A. TRUE ---B. FALSE

Question: 13 of 60

A. TRUE

B. FALSE ---Question: 14 of 60

Select an answer A. -r B. -x C. -i---D. -1 Question: 15 of 60

Which of the following options will be used to display number of blocks used by a file? Select an answer A. -c B. -i C. -d D. -s ---Question: 16 of 60

A. TRUE ---B. FALSE

Question: 17 of 60

The Kernel communicates with the hardware in machine language. Select an answer

A. TRUE ---B. FALSE

Question: 18 of 60

Which of the following command addresses all users who are currently hooked on? Select an answer

A. Write B. Mail

C. Wall ---D. Mesg

(37)

The default integer value of standard error file is: Select an answer A. 1 B. 2 ---C. 4 D. 0 Question: 20 of 60

Which of the following is used for matching patterns in regular expression? Select an answer A. ^ ---B. > C. < D. $ Question: 21 of 60 lt043979enQ0017

Which command is used to remove a directory? Select an answer A. Rd B. Rmdir ---C. Dldir D. Rdir Question: 22 of 60 lt043979enQ0018 creat() stands for: Select an answer A. Open B. Input C. Output D. Create ---Question: 23 of 60 lt043979enQ0005

Command for changing permissions is: Select an answer A. Chmod ---B. Chgrp C. Cat D. Cd Question: 24 of 60 lt043979enQ0049

A. TRUE

B. FALSE ---Question: 25 of 60 lt043979enQ0036 The engine of UNIX is: Select an an

A. The Shell B. Command

(38)

---D. None of the options are correct Question: 26 of 60

lt043979enQ0008

Which symbol is used for output redirection operator? Select an answer A. > ---B. < C. >> D. << Question: 27 of 60 lt043979enQ0046

Which symbol is used to specify a group of character? Select an answer A. () B. {} C. [] ---D. <> Question: 28 of 60 lt043979enQ0044

Which of the following is not the filter command? (Please select ALL that apply)

Select an answer A. Head B. Grep C. :w --D. Ex ---E. Uniq Question: 29 of 60 lt043979enQ0039

A link is a pointer reference to another file. Select an answer

A. TRUE ---B. FALSE

The agency that sits between the user and the UNIX system is called the: Select an answer A. Logic B. Profile C. Shell ---D. Erxc Question: 32 of 60 lt043979enQ0165

Which of the mentioned below is / are the resource type for UNIX? Select an answer

(39)

B. Memory C. I / O time

D. All the options are correct ---Question: 33 of 60

lt043979enQ0131

What is the primary job of the shell? Select an answer

A. A command interpreter

B. The core of the operating system

C. Interpreter between applications and the OS ---D. Shell programming

_____________ are not the components of the programming systems. Select an answer A. Assembler B. Macros ---C. Compilers D. Hard disk Question: 35 of 60 lt043979enQ0144

Which of the following files will displayed by this command? Select an answer

A. Patch B. Catch C. .ch

lt043979enQ0186 What will rm -rf * do? Select an answer A. Removes all files B. Removes all directories

C. Removes all files and directories in a directory ---D. Gives error

C. compress *.c cporg.gz ---D. None of the options are correct Question: 38 of 60

lt043979enQ0199

What does the cat command do? Select an answer

A. Gives a listing of all files in a directory B. Creates and displays file's content C. Displays your current working directory D. All the options are correct

(40)

---Question: 39 of 60

D. None of the options are correct ---Question: 40 of 60 UNIX is a: Select an answer A. 64-bit OS B. 32-bit OS C. 16-bit OS

D. None of the options are correct ---Question: 41 of 60

The kill command with the -20 option is used to: Select an answer A. Terminate a process B. Stop a process C. Kill a process ---D. Interrupt a process Question: 42 of 60

Which command is used to save current file in vi editor? Select an answer A. h B. n C. :w ---D. w: Question: 43 of 60 lt043979enQ0169

Command to list all the files available in the current directory of remote machine is: Select an answer A. prompt on ---B. CD dirname C. Dir D. Lcddirname Question: 44 of 60 lt043979enQ0086

The modes of Vi editor is: Select an answer

A. Command mode B. Input mode

C. Both Command mode and Input mode ---D. Executive mode

How do we kill a process forcefully? Select an answer

A. kill 9 PID ---B. kill PID

C. kill 9 PPID

(41)

Which of the following keys is used to replace a single character with new text? Select an answer A. s B. s ---C. r D. c Question: 47 of 60 lt043979enQ0182

C. Takes the output of one command and passes it as the input into a following command

---D. Takes the output & sends to user Question: 48 of 60

A. Display text or variables

---B. Used to repeat a command more than once C. Displays text twice

D. To echo the input Question: 49 of 60

Which are types of storage for file format? Select an answer

lt043979enQ0208

cat< file1 >file2 2> err.log

what is the output of the command? Select an answer

A. Concates file1 and file2 , if any error stored to "err.log" file B. Concates file1 and file2 , if any error displayed on console

C. Contents of file1 is stored under file2, if any error stored to "err.log" file ---D. None of the options are correct

Question: 51 of 60

A. I/O Processors B. CPU

C. Printer

---D. All the options are correct Question: 52 of 60

A. Read access (r) B. Write access (w)

(42)

C. Execute access (x)

A. Symbolic link

B. Socket special file ---C. Block special file

D. Character special file Question: 54 of 60

Which is the valid command to display all the files with size 100 to 399 bytes occupied? Select an answer

C. ls |cut -d" " -f1-5,9 | grep -w "[0-3][0-9][0-9]" D. None of the options are correct

Question: 55 of 60

The Octal number to be given along with chmod command to make a file readable, writable, and executable to the owner, readable and executable to group and others is:

Select an answer A. 0 B. 755 ---C. 744 D. 555 Question: 56 of 60

A file contains, employee information like code name, department, salary in this format, with colon(:) as delimiter. How do we display the highest salary drawing 2 people all the details? Select an answer

A. cat emp.dat | tr ":" " " |sort +2 | head -2 B. sort emp.dat | head -2

C. sort -t":" +2 emp.dat | tr ":" " " | cut -d":" -f1,3 D. None of the options are correct

Question: 57 of 60

C. cp / root.filename / usr /username /current D. None of the options are correct ---Question: 58 of 60

Command used to display output of a command line by line is: Select an answer

A. More file name B. Less file name

C. Both more and less file name ---D. None of the options are correct

Question: 59 of 60

catemp.lst | sort | tee temp | uniq | cut d " " f2 What is the output of the file temp?

Select an answer

(43)

C. Sorted contents of emp.lst ---D. None of the options are correct

A. tail -2 filename | head 1

B. cat filename | tail -3 | head -1 ---C. tail +2 filename | head -1 | tail 1