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UNIX INTERVIEW QUESTIONS
 
51What Are The Options Available To Determine The Group ID Of The New File?
Date Posted: 07/02/2012

Ans:

  • The group ID of the new file can be the effective group ID of the process
  • The group ID of the new file can be the group ID of the directory in which the file is being created.

 
 
52List Down The Different File Types?
Date Posted: 07/02/2012

Ans:

  • Regular file
  • Directory file
  • Character special file
  • Block special file
  • FIFO
  • Symbolic link
  • Socket

 
 
53Define Program And Process?
Date Posted: 07/02/2012

Ans: A program is a executable file residing in a disk file. An executing instance of a program is called a process. Every UNIX process has a unique numeric identifier called the process ID. The process ID is always a non negative integer.

 
 
54Define Directory And Filename?
Date Posted: 07/02/2012

Ans: A directory is a file that contains directory entries. The directory entry containing a file name along with structure of information describing the attributes of the file. The names in a directory are called filename. The only two characters that cannot appear in a file name are / and null character.

 
 
55What Is UNIX?
Date Posted: 07/02/2012

Ans: UNIX is the most popular operating system on multi-user systems. This operating system originated as a single-user system. It started off on a cast-off DEC PDP-7 at Bell laboratories in 1969. Ken Thompson, with ideas and help from Dennis Ritchie, and others, wrote a small, general-purpose operating system.

 
 
56Define Message Queue?
Date Posted: 07/02/2012

Ans: message queue Message queue is a linked list of messages. It is used to make a communication between the related or unrelated processes.

 
 
57Define Session?
Date Posted: 07/02/2012

Ans: A session is a collection of one or more process groups. A process establishes a new session by calling setsid function. This function returns process group id if OK.

 
 
58How Do You Find Out The Current Directory You’re In?
Date Posted: 07/02/2012

Ans: Pwd.

 
 
59What Are The Different Security Features In UNIX?
Date Posted: 07/02/2012

Ans:

  • Password protection
  • File permissions
  • Encryption.

 
 
60What Is Kernel?
Date Posted: 07/02/2012

Ans: Kernel is core part of UNIX o/s. It is a group of hundreds of system calls.

 
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