What are Top 20 Unix application support interview questions?

In my previous articles I have given the details about the application support interview questions and answers. In this article I would like to give you information about the Unix application support interview questions and answers. This article is particular to Unix application support interview questions with its answers.

Question 1 : What is your experience with Unix/Linux administration? Answer:

I have worked as a Unix/Linux system administrator for 10 years. During this time, I have worked on several projects, including server maintenance, system monitoring, and application support.

Question 2: How do you troubleshoot a Unix system that has crashed? Answer :

First, I check the system logs to determine the cause of the crash. Then, I try to restart the system to see if the issue has been resolved. If the issue persists, I run system diagnostics and perform hardware checks to determine the root cause of the problem.

Question 3 : What is your experience with shell scripting?

Answer:

I have worked extensively with shell scripting and have written scripts to automate tasks such as backups, log rotation, and system monitoring.

Question 4 : How do you monitor Unix systems to ensure their availability and performance?

Answer:

I use a combination of tools, including Nagios, Zabbix, and Cacti, to monitor system performance and availability. I set up alerts to notify me of any issues or potential issues, and I regularly review system logs to identify any potential problems.

Question 5 : How do you manage user accounts and permissions on a Unix system?

Answer:

I use the useradd and userdel commands to create and delete user accounts, and I use the chmod command to manage permissions.

Question 6 :How do you manage disk space on a Unix system?

Answer:

I regularly monitor disk space usage using tools such as df and du, and I use the rm command to remove any unnecessary files.

Question 7 : What is your experience with Unix virtualization technologies?

Answer:

I have experience with several virtualization technologies, including VirtualBox, KVM, and VMware.

Question 8 : How do you handle security updates and patches on a Unix system?

Answer:

I regularly check for security updates and patches using tools such as yum or apt-get, and I apply updates as needed. I also keep up to date with security advisories and patches issued by vendors.

Question 9 : What is your experience with Unix clustering and high availability?

Answer:

I have worked with several clustering technologies, including Pacemaker and Red Hat Cluster Suite, and have implemented high availability solutions for critical applications.

Question 10 : How do you troubleshoot network connectivity issues on a Unix system?

Answer:

I use tools such as ping and traceroute to test network connectivity and identify any issues. I also review system logs to see if there are any errors related to network connectivity.

Question 11 : What is your experience with Unix backup and recovery solutions?

Answer:

I have experience with several backup and recovery solutions, including tar, rsync, and Bacula.

Question 12 : How do you manage software packages on a Unix system?

Answer:

I use package managers such as apt, yum, and rpm to install and manage software packages on a Unix system.

Question 13 : What is your experience with Unix cloud computing?

Answer:

I have experience with several cloud computing platforms, including Amazon Web Services and Google Cloud Platform.

Question 14 : How do you manage system resources on a Unix system?

Answer:

I use tools such as top and sar to monitor system resources and identify any potential issues. I also regularly review system logs to identify any resource-related problems.

Question 15 : What is your experience with Unix web servers such as Apache or Nginx?

Answer:

I have worked with several web servers, including Apache and Nginx, and have configured them to serve static and dynamic content.

Question 16 : How do you troubleshoot application issues on a Unix system?

Answer:

I use tools such as strace and lsof to identify any issues related to application behavior. I also review system logs to identify any errors related to the application.

Question 17 : What is the purpose of the ‘sed’ command in UNIX?

Answer:

The sed command is used to perform text transformations on a file or set of files in UNIX.

Question 18 : What is the purpose of the ‘awk’ command in UNIX?

Answer:

The awk command is used to process and manipulate text data in UNIX.

Question 19 : What is the purpose of the ‘ssh’ command in UNIX?

Answer:

The ssh command is used to establish a secure shell connection to a remote system.

Question 20 : What is the purpose of the ‘sudo’ command in UNIX?

Answer:

The sudo command is used to run commands.

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