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 6972

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 8595

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

5 12442

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 16137

tell me similarities between thread and process

Tanla Solutions,

4 34516

what is mean by kernal?

Excel,

9 13377

describe the escaping sequence characteres in unix

1 8122

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

2 4675

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

Mac, Nokia,

24 41162

What is an Environment Variable?

CTS,

4 12085

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

HCL, IBM,

3092

What is file constructing in UNIX/AIX ?

IBM, TCS,

2 8341

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 12803

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

5 10379

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 8870

Un-Answered Questions { Unix }

What does the swapping system do if it identifies the illegal page for swapping?

1099

How to get the n-th field from a Unix command output?

1029

What is inode in unix operating system?

984

What are data structures that are used for Demand Paging?

1042

What is buffer header unix?

930

What are the main features of unix?

1625

What does pipe do in unix?

1018

Give a brief idea about representation of devices in unix.

1030

What are the events done by the Kernel after a process is being swapped out from the main memory?

2682

Using unix command how to display no of records in oracle?

1207

How to give execute permission for a file in unix?

1057

Why kernel is known as the heart of unix os?

1033

How to write the program on full-duplex communication on bidirectional?

1087

Can a socket have multiple ports?

908

What is pipe command in unix?

1355

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