Unix Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Unix Interview Questions

Questions Answers Views Company eMail

Assume that a file’s permissions give you read and write access. What operations can you perform on the file if it is in a directory which has “r”(read) only process? What operations can you perform on the file if it is in a directory which has “x”(execute) only access?

1 6794

When the shell is reading the command line what is the difference between text enclosed between double quotes ( ” ) and text enclosed between signal quotes ( ’ )?

3 8325

The rm command removes links to file. What does this mean? How then is a file deleted from the file system?

5 11917

Assume the following files are in the working directory prompt> ls -l tasks -rw-r--r-- 1 alex student 1423 Feb 21 14:01 tasks What command can Alex use to give everyone permission to write to the file? What will the ls -l command display if he does so?

Infosys,

10 15414

tell me similarities between thread and process

Tanla Solutions,

4 34110

what is mean by kernal?

Excel,

9 12831

describe the escaping sequence characteres in unix

1 7922

System A can contact system B, but not in reverse, not firewall, not tcp wrappers, what is the reason ?

2 4478

Write a grep (or grep) command that selects the lines from a file that have exactly three characters.

Mac, Nokia,

24 39682

What is an Environment Variable?

CTS,

4 11725

If Media Server fails. What are the steps to be followed? Can anyone please reply for this question Thanks, Ganesh

HCL, IBM,

2974

What is file constructing in UNIX/AIX ?

IBM, TCS,

2 8125

How to find the version details of unix? if any application is installed in unix OS how to find the version of that application is it possilbe or not? pls let me know cmd in detail.

HCL,

5 12352

what is the use of ls -l command & what is the information it gives about user ?

5 9965

What is mean by Mac os? Why it is named as like that? Which purprose it is using? Please answer me. Advance thanks.

Excel, GeniusPort,

2 8636

Un-Answered Questions { Unix }

What are the file permissions and access modes in unix?

918

What are the various schemes available?

893

What is c shell in unix?

807

Are unix sockets faster than tcp?

803

What are data structures that are used for Demand Paging?

936

What is source unix?

855

Name the different file types available with unix.

855

Can you explain a little bit about command substitution?

1061

What are shell variables?

864

What are the various ids in unix processes?

859

How do I convert a string into an internet address?

1320

How does pipe () work?

1040

What are the advantages of unix?

967

What is difference between find and grep in unix?

891

What does the command ' $who | sort –logfile > newfile' do?

1238

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