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 6903

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 8465

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

5 12182

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 15777

tell me similarities between thread and process

Tanla Solutions,

4 34310

what is mean by kernal?

Excel,

9 13120

describe the escaping sequence characteres in unix

1 8029

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

2 4586

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

Mac, Nokia,

24 40419

What is an Environment Variable?

CTS,

4 11895

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

HCL, IBM,

3030

What is file constructing in UNIX/AIX ?

IBM, TCS,

2 8230

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 12598

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

5 10164

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 8760

Un-Answered Questions { Unix }

Differentiate between paging and swapping?

904

What is tilde unix?

1027

What is grep r?

1091

How does the system know where one command ends and another begins?

2249

What is path variable in unix?

989

How do I search a whole word in vim?

1175

What is a unix shell?

975

What are the criteria for choosing a process for swapping into memory from the swap device?

999

Which command is used to create a directory?

1160

Who invented grep?

1158

How to create a blank file in unix?

971

What are the various ids in unix processes?

905

Which language unix is written?

1024

Can you explain what does the kernel do?

917

What is the use of the tee command?

1093

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