7 top DevOps engineer interview questions for 2020

An important feature that was added in later versions is the ability to chain CNI plugins. Define a convention that all migrations must be backwards how to become a devops engineer compatible. All features are implemented using feature flags in this case. Application rollbacks are therefore independent of the database.

This helps to reduce the frequency of fetching from external sources. This also helps in speeding up the dynamic web applications by alleviating database load. Infrastructure as Code is a type of IT infrastructure that operations teams can use to automatically manage and provision through code, rather than using a manual process. For this answer, my suggestion would be to give a small definition of Selenium Grid. It can be used to execute same or different test scripts on multiple platforms and browsers concurrently to achieve distributed test execution. This allows testing under different environments and saving execution time remarkably. DevOps equates to developers running a production environment.

Has there ever been a time when your outside-the-box thinking helped solve a problem?

Firewall your puppet master – restrict port tcp/8140 to only networks that you trust. Assert command checks whether the given condition is true or false. Let’s say we assert whether the given element is present on the web page or not. If the condition is true, then the program control will execute the next test step. But, if the condition is false, the execution would stop and no further test would be executed.

However, no further tests will be run, and the execution will halt, if the condition is false. Selenium IDE is the best environment for building Selenium tests, regardless of the style of testing we prefer, thanks to the ability to move instructions around rapidly and the autocomplete support. Optional steps for gathering data from the build, like collecting javadoc, testing results and/or archiving artifacts. In order to create a backup of Jenkins setup, copy the JENKINS_HOME directory. Used to show differences between the two mentioned branches/differences made in the files in the staging area vs current version. A Git merge conflict happens when you have merge branches with competing for commits, and Git needs your help to decide which changes to incorporate in the final merge.

Which are the best Continuous Monitoring tools?

Git rebase is a command which is designed to integrate the changes from one branch to another brand. Yes, we can make a new copy of an existing Jenkins job by creating a clone of the directory in a different name. The process of monitoring as well as maintaining things of value to an entity or group is called Asset Management. Containers are a form of lightweight virtualization that help in providing isolation among processes.

Which resulted in finding the bugs at the very initial stage which increased the speed and efficiency. While continuous delivery aims at producing software that can be released at any time, releases to production are still done manually at someone’s decision.

List the key components of DevOps.

You’ll also find guidance on the kind of insight each question provides and ideal answers to listen out for when you conduct an interview. DevOps Engineers are highly in demand in the tech industry—they have the ideal mix of technical and development skills, plus resource management and communication skills. This powerful combo also means it’s particularly tricky to find the right person for your team and the job. In other words, Docker images are used to create containers. Images are created with the build command, and they’ll produce a container when started with run. You manage all configuration, notification, and reporting from the master, while the slaves do all the work.

You should generally know multiple languages, with a mastery of one and strong knowledge of two more. Build https://remotemode.net/ the confidence and practical skills that employers are looking for with Forage virtual work experiences.

Q13. What is Chef?

This design takes advantage of Nagios’s ability to utilize passive checks i.e. external applications or processes that send results back to Nagios. In a distributed configuration, these external applications are other instances of Nagios. Ansible and Puppet are two of the most popular configuration management tools among DevOps engineers. It is a powerful automation platform that transforms infrastructure into code. Chef is a tool for which you write scripts that are used to automate processes. The command effectively will replay the changes made in the feature branch at the tip of master, allowing conflicts to be resolved in the process. When done with care, this will allow the feature branch to be merged into master with relative ease and sometimes as a simple fast-forward operation.

• Suggested answers verified by our panel of interview experts.
• However, if you want lightweight PaaS, then Dokku is a good option because bash script can be PaaS out of Dokku containers.
• Have a deep understanding of parsing tools like awk, sed, and grep.
• But, before we get to the most frequently asked DevOps interview questions, let me tell you what DevOps actually is.