In this post, I am sharing with you several advanced Linux performance testing interview questions you’re likely to experience during your final interview. These Linux performance testing questions and answers will help you gain an understanding of what your potential employer is going to be asking you at the interview. This information could possibly save you significant time during the interviewing process. Here are the questions I’ve uncovered that can help you get a faster pass rate on your Linux performance testing interview:
What is the system load average when running the following command? (You’ll need to enter the load average into the quote box in order to receive accurate results.) This is a very important Linux performance question. Your answer will be greatly affected by the actual load average of your computer system as well as the speed of your Internet connection. If your Internet connection is too slow, it may take you much longer to complete the above command.
What are the three most widely used shells in Linux? (The answers to this question can be found in the Linux man page.) The majority of Linux systems come pre-loaded with a number of popular, free shells. To obtain an accurate answer, think of the popular shells which most people use on their Linux PC. Then, think of the reason they are popular.
What is your boot loader? (You can find this in your Linux boot command.) The boot loader is a small program which maintains your computer’s operating system (OS) inside a small diskette. You should never have to see or use the boot loader during the Linux interview. If you have to, simply shut it down and reboot your computer.
You might be wondering what sort of a POSIX Linux administrator is? A POSIX Linux administrator is one who maintains and upgrades the Linux operating system from his own desk. An administrator also has the responsibility of adding new users, setting up networking, and otherwise making certain that the Linux operating system and its components are properly maintained and functioning. In other words, a POSIX Linux administrator performs administrative tasks.
What is a crontab? A crontab is a command line tool which lets you schedule tasks to run periodically. You can type “crontab -h” to get a list of available cron commands. Linux users will note that there is a bash crontab in the official package. Non-bugs users can install one of the many cron packages to use as an alternative to the crontab.
How does Ubuntu get the job done? Ubuntu is a Linux derivative developed by the Canonical organization under the name “Ubuntu”. It is the most widely used Linux distribution in the world, and it is a free software package that offers powerful features for network servers running Linux.
The administration interview questions related to Linux are relatively simple to answer. The first few commands interview questions will cover will include how to upgrade, install, and run various utilities. The more thorough the experience, the more complex the commands interview questions will get. If you have never worked as an admin in a large Linux system, it can be very intimidating if your answers don’t make sense or if you can’t explain why you chose a particular command.
For this reason, you want to have at least some understanding of Linux command shells. These are just simple commands that the OS reads and then reacts to in order to perform different tasks. They are very common, and you should be able to recognize them by looking at a web browser or terminal.
One of the most common shells is “ps” or “ksh”. It is a simple command shell that works with the POSIX platform and allows you to access files, change settings, and manage user accounts. The most commonly used POSIX “ps” command is actually “pass”. Just type this into a terminal and you are already inside your user account.
Another popular shell is “ksh”. This is a more interactive variety of POSIX shell and has quite a bit more functionality than its simpler counterpart. While bash has been the “standard” for Linux command shells, ksh is a more advanced shell that allows you to use your keyboard for various functions instead of your mouse. There are also a number of additional functions that can be executed through the ksh prompt.