Top DevOps Interview Question and Answers in 2020

Top DevOps Interview Question and Answers in 2020

Question 1
Why DevOps?
Answer Many advantages of quick feedback from customers, better quality of software etc. which in turn leads to high customer satisfaction. To achieve this, companies are required to:

  • To maximized deployment frequency
  • The low possibility of new release failure
  • Faster recovery in the event of new release crash

DevOps meets all these requirements and assists in attaining continuous software conveyance. You can give instances of enterprises like Google and Amazon which have adopted DevOps to feat levels of performance that were done never before. They are doing tens of thousands of code deployments each day while deploying best stability, dependability and security.

What does a DevOps engineer do to agile development?

Answer : A DevOps engineer works closely with agile development teams to confirm they have an efficient environment required to brace the functions such as automated testing, ceaseless integration and seamless delivery. DevOps engineer has be in nonstop contact with the developers and make all required parts of environment work seamlessly. So with this active collaborations between these two teams will produce outstanding software deliveries.

How is seamless delivery related to DevOps practice?

Answer :In every organization where there is a distinct operations department, and particularly where there is a private testing function, the much of the difficulty in getting software delivered is caused by inefficient communication between these various groups, aggravated by the cultural divide as well. The point of devops is that developers need to have an idea as to how to generate high-quality, production-based software, and operations have to learn that agile techniques are actually powerful tools to enable effective, low-risk change management. In the end, we are all seeking to attain the same thing, that is generating business value through software, but we need to get better at collaborating together and singling out on this goal rather than trying to work out our own domains.

What are the key aspects behind DevOps?

Answer :The key principle behind DevOps is:

  • Infrastructure as code
  • Seamless deployment
  • Full-fledged Automation
  • Thorough Monitoring
  • High level Security

What are the important tools to work with DevOps?

Answer : Here are the most popular tools to practice DevOps.

  • Jenkins
  • Ansible
  • Git
  • Docker
  • Nagios
  • Monit
  • ELK (Elasticsearch, Logstash, Kibana)
  • io

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What are the technical and business advantages of DevOps?

Answer :
Technical benefits:

  • Software delivery is seamless and never ceases to exist.
  • Minimized Complexity problems.
  • Faster problems resolutions
  • Minimum number of Manpower.

Business benefits:

  • Higher rate of features delivery.
  • Stability in operating environments
  • More time earned to Add values.
  • Faster time to market

Where does agile and DevOps differ?

Answer : Agile is just concerned about software development. This agile method assists with its powerful tools to develop the complete front-end and back-end software applications.
But the DevOps practice is all about deployment and management of the software. But DevOps never does replace Agile. It does this by expelling handovers, and streamlining deployments to permit faster and more seamless deployments to production phase.

What are the adaptations techniques of DevOps practice?

Answer :

  • Using agile and other development procedures and methods.
  • High demand for an evolved rate of production releases from application and business.
  • Wide possibility of virtual and cloud infrastructure from both internal and external service providers.
  • Maximized usage of data centre, automation and configuration management toolkits.
  • Growing focus on test automation and seamless integration techniques.
  • Best practices on crucial problems.

What are essential skills needed to become a DevOps engineer?

Answer :

  • Good knowledge in system administration
  • Experience in Virtualization
  • Excellent Scripting knowledge
  • Good developing expertise
  • Knowledge of Chef in automation tool
  • Real-time Cloud operations experience

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Why are configuration management processes and tools important in DevOps?

Answer : Multiple software builds, releases, revisions, and versions for each software or tthat is being developed configuration management is important feature. Next when we move on to explain the need for the storage and maintainenance data, updated about the development builds and simplified troubleshooting. Mentioning the key CM tools that can be used to fulfil these objectives. How tools like Puppet, Ansible, and Chef Supports to automate software deployment and configuration on multiple servers is also important to note.

How IaC is implemented using AWS?

Answer : Similar to the codes written for other services, with the support of AWS, Infrastructure as Code allows developers to write, test, and manage infrastructure elements in a descriptive manner, using JSON or YAML formats. This equips easier development and faster deployment of infrastructure alterations.
Thorough knowledge of processes, tools, and relevant technology are crucial. You must also have a complete understanding of the products, services, and systems accordingly.

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What are the benefits of using version control?

Answer :

  • With Version Control System (VCS), all the team members can work freely on any file at any given time. VCS will later help us to blend all the changes into a common version.
  • All the previous versions and variants are compactly packed up into the VCS. When we require it, we can request any version at any time and we will have a snapshot of the full project.
  • Every time we save a newer version of the project, the VCS needs us to provide a short description of what was changed in the process. Moreover, we can see what actually was modified in the content of the file system. This gives us ample evidence as to who has made what change in the project.
  • An evenly distributed VCS like Git helps all the team members to have full history of the project so if there is a breakdown in the main server we can use any of the teammate’s local Git repository.

How can we move or copy Jenkins from one server to another?

Answer : Fulfil this task of moving Jenkins back and forth, copy the jobs directory from the old server to the new one. There are several ways to do that.

  • Move a job from one installation of Jenkins to another by just copying the relative job directory.
  • Make a copy of an already available job by cloning a job directory by a different name.
  • Rename a current job by renaming a directory. If we change a job name we will require to alter any other job that attempts to call the renamed job.

What is Continuous Testing?

Answer : Continuous Testing is the process of running automated tests as part of the software supply pipeline to get sudden feedback on the business risks associated with in the late build. In this way, each build is tested without a pause, permitting Development teams to get fast feedback so that they can stop those issues from developing to the next phase of software delivery lifecycle. This element speeds up a developer’s workflow as there is no requirement to manually rebuild the project and rerun the entire tests after making alterations.

How to automate Testing in DevOps lifecycle?

Answer : In DevOps, developers are asked to perform all the changes made in the source code to a allocated repository. Continuous Integration tools like Jenkins will extract the code from this split repository each time a change is made in the code and execute it for Continuous Testing that is accomplished by tools like Selenium as explained. In this manner, any change in the code is thoroughly tested not like the traditional approach.

What is Ansible module?

Answer : Modules are deemed to be the units of the task in Ansible. Every module is in fact stand-alone and can be written in a usual scripting language such as Python, Perl, Ruby, bash, and more. One of the important characteristic of modules is idempotency, which means that even if a work is iterated several times for instance, upon recovery from an outage, it will always place the system into the exact state.

Why is Continuous monitoring important?

Answer : Continuous Monitoring helps us to have time finding out of issues or weaknesses and immediate corrective action that helps minimize the monetary expenses of an organization. Continuous monitoring offers the solution that takes into account three operational fields known as:

  • continuous audit
  • continuous controls monitoring
  • continuous transaction inspection

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