Unix - Interview Questions and Answers for 'Unix commands' | Search Interview Question - javasearch.buggybread.com
Javasearch.buggybread.com

Search Interview Questions


 More than 3000 questions in repository.
 There are more than 900 unanswered questions.
Click here and help us by providing the answer.
 Have a video suggestion.
Click Correct / Improve and please let us know.
Label / Company      Label / Company / Text

   



Unix - Interview Questions and Answers for 'Unix commands' - 8 question(s) found - Order By Newest

 Q1. How to display and set the Class path in Unix ?
Ans. To display the current CLASSPATH variable, use these commands in UNIX (Bourne shell):

% echo $CLASSPATH

To delete the current contents of the CLASSPATH variable,

In UNIX: % unset CLASSPATH; export CLASSPATH

To set the CLASSPATH variable,

In UNIX: % CLASSPATH=/home/george/java/classes; export CLASSPATH

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     unix   unix commands   classpath


 Q2. What is the use of !! command ? Can I use it with conjunction to some other string to complete a command ? Unix
Ans. Its used to execute last command. Yes this can be used with other string to execute new command. For eg - if ls was the last command, We can execute !! -l for having the long listing.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     unix   unix commands   !! unix command   build management   release management


 Q3. Write a unix command to find top 10 files by size ?Unix
Ans. du -a /var | sort -n -r | head -n 10

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     unix command     Asked in 1 Companies


 Q4. What are fields that gets displayed when you execute "Top" command and briefly explain each field ?Unix
Ans. PID - process identification number is an identification number that is automatically assigned to each process when it is created

USER - User Name

PR - PR is the process actual priority

NI is the nice value, which is a user-space concept.

VIRT -Virtual Image (kb). The total amount of virtual memory used by the task.

RES - Resident size (kb). The non-swapped physical memory a task has used.

SHR - Shared Mem size (kb). The amount of shared memory used by a task.

S - Process Status. The status of the task which can be one of:

D = uninterruptible sleep
R = running
S = sleeping
T = traced or stopped
Z = zombie

%CPU - % CPU usage

%MEM - % MEM Usage

TIME - Total CPU time the task has used since it started.

COMMAND - Command which was used to execute the process

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     top command  unix command     Asked in 1 Companies


 Q5. As root, if you have to assign the owner for the file and set only read permission for the owner, Write a unix command to do it.Unix
Ans. chmod 477

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     unix commands  setting file permissions  chown  chmod


 Q6. Can you tell me any 10 unix command you have worked with ?Unix
Ans. grep, ls, kill, vi , scp , wget,telnet, zip, unzip,mv,cp

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     unix commands     Asked in 1 Companies      basic


 Q7. How do you ftp files to a different server ? Do you use scp or mput etc.Unix
Ans. I use both mput as well as scp. mput usually with sftp

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     unix commands  ftp


 Q8. Can we change permissions recursively for all folders and files within a single folder ?Unix
Ans. chmod 777 -R /directory

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     Unix Commands


 Q9. How to append the output of a command to file Unix
a. command < file
b. command > file
c. command <> file
d. command >> file

Ans.d. command >> file

 Q10. Which command helps you know in which folder you currently are ?Unix
a. cat
b. pwd
c. vi
d. who am i

Ans.b. pwd


Help us and Others Improve. Please let us know the questions asked in any of your previous interview.

Any input from you will be highly appreciated and It will unlock the application for 10 more requests.

Company Name:
Questions Asked: