Three Basic Unix Interview Questions for Freshers for application support and production support.
Three Basic Unix Interview Questions for Freshers for application support and production support.
Q1) What is UNIX?
ANS It can be defined as Portable operating system which is designed for an efficient multi-tasking and multi-user functions.
It CAN RUN ON multiple hardware platforms like window, ubuntu and mac .so it is called as portable operating system.
It was developed due to c language.
It was developed by ken Thompson ,Dennis Ritchie,DOUGHLAS MCLLROY AND JOE OSSANNA.
IT WAS DEVELOPED IN YEAR 1970.
It has GUI[Graphical user interface] similar to window operating system which makes easy to use and user friendly.
IT IS USED FOR SERVER,DESKTOP and LAPTOP.
IN telenet session, Unix basic commands are required to use.
Q2) PLEASE MENTION THE DISTRIBUTION OF UNIX?
ANS SOLARIS(ORACLE) UNIX,AIX(IBM),HP UNIX AND BSD[BERKELEY SOFTWARE DISTRIBUTION] .
Q3) DESCRIBE THE FEATURES OF UNIX?
ANS, It supports multiuser system environment which means that many users can use the system with separate workspace
and logins. Multiple users are running multiple jobs and single user are running multiple jobs.
IT SUPPORTS MULTITASKING ENVIRONMENT in which many apps can run at single instance of time period. SINGLE USERS ARE RUNNING
Multiple Tasks concurrently like EDITING TEXT ON THE WORD, PRINTING THE PDF Documents, SENDING AN EMAIL to the relevant person and
surfing an internet too. KERNEL IS BUILT TO support the multi-tasking needs of the users.JOBS ARE CARRIED OUT BY OS IN FOREGROUND AND
BACKGROUND.
IT IS AN OPEN-SOURCE OPERATING SYSTEM which allows the users to modify and distribute the source codes.
IT IS HIGHLY SCALABLE because it is allowed to be used on the small embedded system to large scale data centers.
IT HAS CLI [Command line interface] which interact with the system through the shell program.
IT HAS HIERARCHICAL FILE SYSTEM WITH ALL FILES AND DIRECTORIES ARE ORGANIZED UNDER THE SINGLE ROOT DIRECTORY.
IT WAS DESIGNED TO SUPPORT NETWORKING for servers and network systems.
IT HAS built in ROBUST SECURITY FEATURES like user level permission and ACCESS CONTROL LISTS.
IT IS HIGHLY PORTABLE which means that it can run on different hardware platforms.
Documentation are easily available at online and offline mode. Man command is used to provide the important reference for all Unix commands
and their configurations. In online mode,newsgroups,forums and frequently asked group are here to troubleshoot your Unix concerns.
Unix provides shell which is carrying programming facilities for the programmer. SHELL CAN CONTAIN control structures, loop
and variables etc. for programming purpose.
IT PROVIDES THE PATTERN MATCHING FEATURES. Meta-char ‘*’ is a special character to match the number of file names.
IT PROVIDES TOOLKIT LIKE KERNEL, text manipulation utilities or filters,compilers,interpretErs,network programs, system administration tools which
help the users for performing the complete task .IN EVERY RELEASE OF UNIX, old features are removed or modified and carry the new features
. For running the host applications, toolkit is necessary, and kernel alone cannot perform the whole tasks.
It supports the building-based approach by using pipe which connects the two commands in such manner that output of one can used as input for
another. $ ls|wc :it counts the number of files in the directory.