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IBM-AIX Interview Questions & Answers to Crack any MNC.

by Nasar Mohammed Senior Digital Marketing Associate

1. What is IBM AIX?

AIX(Advanced Interactive executive) is a series of proprietary Unix operating systems developed and sold by IBM for several of its computer platforms. Originally released for the IBM 6150 RISC workstation, AIX now supports or has supported a wide variety of hardware platforms, including the IBM RS/6000 series and later IBM POWER and PowerPC-based systems, IBM System i, System/370 mainframes, PS/2 personal computers, and the Apple Network Server. AIX is based on UNIX System V with 4.3BSD-compatible extensions. It is one of four commercial operating systems that are presently certified to The Open Group's UNIX 03 standard 

2. Define commands and process in AIX?

A command is a request to perform an operation or run a program. A process is a program or command that is actually running on the computer. We use commands to tell the operating system what task you want it to perform. When commands are entered, they are deciphered by a command interpreter (also known as a shell), and that task is processed.

The operating system can run many different processes at the same time. The operating system allows you to manipulate the input and output (I/O) of data to and from your system by using specific I/O commands and symbols. You can control input by specifying the location from which to gather data. For example, you can specify to read input entered on the keyboard (standard input) or to read input from a file. You can control output by specifying where to display or store data. For example, you can specify to write output data to the screen (standard output) or to write it to a file.

Commands :- Some commands can be entered simply by typing one word. It is also possible to combine commands so that the output from one command becomes the input for another command.

Processes :- A program or command that is actually running on the computer is referred to as a process.


3. What is an interactive shell?

An interactive shell generally reads from, and writes to, a user's terminal: input and output are connected to a terminal. Bash interactive behavior is started when the bash command is called upon without non-option arguments, except when the option is a string to read from or when the shell is invoked to read from standard input, which allows for positional parameters to be set.


4. What is AIX file system?

 AIX uses a hierarchical file tree that consists of directories, subdirectories and files.

The top level directory is called the root (/) directory that has many subdirectories.

   The file tree is mounted during the system startup.


5. Write the password change command?

$ passwd

$ old password:

$ new password:

$ Enter the new password again:

The passwd command is used to change the user password.

The system will start the passwd process which will prompt the user for their old password first. To prevent users being locked out of the system the new password is entered twice.


6. Write the command format in AIX format?

  $ command option(s) argument(s)

Mail -f newmail

The command or process name should come first.

The options should follow the command name, separated by a space, and preceded by a minus sign (-). Multiple options may be grouped immediately after a single minus sign or separated by spaces and each preceded by a minus sign.


7. Give the brief about AIX?

AIX is the IBM product.

It is the multi user Operating System.

AIX control these hardware devices and to share them between multiple users, for this purpose it uses the AIX Kernel System.

AIX OS servers are the IBM servers used in all over the world.

Kernel is loaded during the system startup.

Kernel is the heart of the AIX OS.

Kernel controls the various processes and tasks.


8. Explain the login process to the AIX system?

AIX is a multi-user system

When the user login he needs to provide the user name and password for authentication purposes.

After the successful login, AIX starts the SHELL program.


9. Explain the SHELL program?

As the user login to the AIX server, the AIX starts the SHELL program.

The SHELL is a command interpreter.

It takes the inputs from the users and executes it.

SHELL is not only the command interpreter it also provide great flexibility to the user.

SHELL not only read and execute the commands it also read the files written in the form of programs and executes them, these shell program files are known as SHELL scripts. The extension of SHELL script is .sh.

10. Name the various SHELL types?

sh or Bourne Shell

bash or Bourne Again shell

csh or C shell

tcsh or Turbo C shell

ksh or the Korn shell


11. Explain the advantages of Bourne Again Shell or bash?

Bash is the GNU shell

Bash is an sh-compatible shell that incorporates useful features from the Korn shell (ksh) and C shell (csh).

It is intended to conform to the IEEE POSIX P1003.2/ISO 9945.2 Shell and Tools standard.

It offers functional improvements over sh for both programming and interactive uses.

Interactive usage includes command line editing, unlimited size command history, job control, shell functions and aliases, indexed arrays of unlimited size, and integer arithmetic in any base from two to sixty-four. Bash can run most sh scripts without modification.


12. Write the date and calendar command?

$ date

$ cal

$ cal 2003 (looking in a year)

$ cal 1 2003(looking in a month)


13. Write the key board shortcuts used on AIX terminal?

Backspace : to correct mistakes.

: terminates the correct command and return to the shell.

: end of transmission or end of file

: temporary stops the output to the screen

: resumes output which was stopped by ctrl+s

: erases the entire line.


14. Explain the AIX file system?

* AIX uses a hierarchical file tree that consists of directories, sub-directories and files.

* The top level directory is called the root (/) directory that has many sub-directories.

* The file tree is mounted during the system start-up.


15. What are the keyboard shortcuts used on AIX terminal?

* Backspace : to correct mistakes.

* : terminates the correct command and return to the shell.

* : end of transmission or end of file

* : temporary stops the output to the screen

* : resumes output which was stopped by ctrl+s

* : erases the entire line.


16. What is server message block file system(SMBFS) in AIX?

Server Message Block File system (SMBFS) allows access to shares on SMB servers as local file systems on AIX. In this file system, the user can create, delete, read, write, and modify the access times of files and directories. The owner or access mode of files and directories cannot be changed.

 

17. What does logical volume manager(LVM) mean?

The set of operating system commands, library subroutines and other tools that allow you to establish and control logical volume storage is called the Logical Volume Manager (LVM).

 

18. What is a logical partition?

A logical partition (LPAR) is the division of a computer's processors, memory, and hardware resources into multiple environments so that each environment can be operated independently with its own operating system and applications


19. How can I change the characteristics of a volume group?

You use the chvg command to change the characteristics of a volume group.


20. How do I create a logical volume?

#mklv -y name_of_logical_volume name_of_volume_group number_of_partition.


21. How do I replace a disk?

* extendvg VolumeGroupName hdisk_new

* migratepv hdisk_bad hdisk_new

* reducevg -d VolumeGroupName hdisk_bad


22. What does SNMP stands for?

Short for Simple Network Management Protocol, a set of protocols for managing complex networks. SNMP works by sending messages, called Protocol Data Units, to different parts of a network. SNMP-compliant devices, called Agents, store data about themselves in Management Information Bases and return this data to the SNMP requesters.

  

23. What is software RAID Levels do?

Redundant Arrays of Independent Disks (RAID) is formally defined as a method to store data on any type of disk medium.


24. How do u take backup of file systems?

#backup -f /dev/rmt0


25. How to lock a user's account?

#chuser account_lock=true username


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About Nasar Mohammed Senior     Senior Digital Marketing Associate

270 connections, 7 recommendations, 712 honor points.
Joined APSense since, November 18th, 2015, From Hyderabad, India.

Created on Dec 20th 2017 06:18. Viewed 730 times.

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