DevOps Platform is noticeably dominating the IT Field. In this rapidly booming technological world, DevOps has been the most classical requisite for almost every Software team. So, thinking of getting into DevOps? Well, then the bright future is yours! Let’s now take a look at some of the most frequently asked DevOps Interview Questions in the DevOps interview along with the possible answers that you can give.
QUESTION: EXPLAIN DEVOPS
DevOps is the newly emerging buzz word in the IT horizon. DevOps is nothing but a certain set of rules that emphasizes the communication between software developers and other information-technology (IT) professionals. This platform guarantees on delivering applications quickly with no compromise in quality.
QUESTION: MENTION THE KEY ASPECTS BEHIND DEVOPS
- Infrastructure as code
- Continuous deployment
QUESTION: MENTION THE CORE OPERATIONS OF DEVOPS WITH APPLICATION DEVELOPMENT AND WITH INFRASTRUCTURE
- Code building and coverage
- Unit testing
QUESTION: WHICH SCRIPTING LANGUAGE IS MOSTLY USED FOR A DEVOPS ENGINEER?
As a simpler scripting language, Python seems to be very popular among DevOps engineers.
READ ALSO: PYTHON INTERVIEW QUESTIONS AND ANSWERS
QUESTION: HOW DEVOPS IS HELPFUL TO DEVELOPERS?
Helps in promoting clearer communication between the team members, DevOps can be helpful to developers to fix the bug and implement new features quickly.
QUESTION: LIST OUT THE TOOLS USED FOR DEVOPS
- ELK (Elasticsearch, Logstash, Kibana)
QUESTION: LIST OUT THE IMPORTANT DEVOPS KPIS
Three of the most common DevOps KPIs are:
- mean time to failure recovery
- deployment frequency
- percentage of failed deployments
QUESTION: EXPLAIN TEST DRIVEN DEVELOPMENT (TDD)
As one of the core agile and DevOps practices, Test Driven Development (TDD) is more helpful in quick iterations and continuous integrations. It is not only considered as a testing practice, but also as a design and development methodology.
TDD is a practice where you write code to address a failing test case. TDD starts with taking requirements, writing test cases and running the code against test cases. Test Cases fail as there is no code to address the test scenario; then, you write a simple code to PASS the test case.
QUESTION: WHAT ARE THE ADVANTAGES OF TEST DRIVEN DEVELOPMENT?
- You can refactor code confidently
- Also, the complete code in your application is well tested; since, it is constructed to address all the test cases.
- Code turns more flexible as developer is addressing all the test cases by coding in smaller units.
QUESTION: CAN DEVOPS BE IMPLEMENTED TO A WATERFALL PROCESS? EXPLAIN THE IMPORTANCE OF THE AGILE PROCESS IN DEVOPS IMPLEMENTATION.
In the waterfall procedure, as us all know at first total Requirements are assembled, next the System is structured; Implementation of the System is then done pursued by System testing and deployed to the end clients. In this procedure, the problem was that there was a huge waiting time for build and deployment which made it very difficult to get the feedback.
The answer for the above issue was that the Agile procedure to bring in agility in both development and operations. The agile process could be the principle or a certain pre-requisite may be required for DevOps implementation. DevOps perfectly incorporated with the Agile process.
The main focus point is to release the final product in an extremely timely way with shorter release cycles and fast feedback. So the agile procedure spotlight will primarily be on speed and in DevOps, it functions admirably with the automation of various tools
QUESTION: WHAT IS CONTINUOUS INTEGRATION?
Continuous delivery is the main aspect to be noted when it comes to DevOps. On the path to Continuous delivery, this integration is a critical step. Continuous Integration defines when an automated build has to be generated. CI is one of the software development practices where member of the team frequently integrates their code, which then undergoes build generation process verifying the code written by individuals. Generally, each member will integrate his/her code once in a day. Each of the CI integration is verified and tested as part of build generation process.
QUESTION: WHAT ARE DESIGN PATTERNS?
Design patterns represent the best practices that are used by developers to rectify the problems they often face. And these design patterns help a novice developer to learn easily and quickly. Also, these patterns have their own standard terminologies addressing specific scenario.
QUESTION: WHAT THE THREE MAIN TYPES OF DESIGN PATTERNS?
Creational: addresses design problems.
Structural: simplifies relationships between objects.
Behavioral: simplifies how objects interact with each other.
QUESTION: HOW DEVOPS DIFFERS FROM AGILE/SDLC?
Agile is a composition of values and principles about how to produce i.e. develop software. Example: if you have some ideas and you want to turn those ideas into working software, you can use the agile values and principles as a way to do that. But, that software might only be working on a developer’s laptop or in a test environment. You want a way to quickly, easily and repeatedly move that software into production infrastructure, in a safe and simple way. To do that you need DevOps tools and techniques
You can summarize by saying Agile software development focuses on the development of software but DevOps on the other hand is responsible for development as well as deployment of the software in the quickest and most reliable way possible.
QUESTION: MENTION FEW OF THE MOST COMMONLY USED DEVOPS TOOLS
- Git: Version Control System tool
- Jenkins: Continuous Integration tool
- Selenium: Continuous Testing tool
- Puppet, Ansible, Chef: Configuration Management and Deployment tools
- Nagios: Continuous Monitoring tool
- Docker: Containerization tool
QUESTION: LIST OUT FEW OF THE BENEFITS OF DEVOPS
- Continuous software delivery
- Less complex problems to fix
- Faster resolution of problems
- Faster delivery of features
- More stable operating environments
- More time available to add value (rather than fix/maintain)
QUESTION: WHAT IS VERSION CONTROL?
Version Control is a system that records the changes or variations to a file or a set of files over time so that you can recall these versions later if needed
QUESTION: MENTION FEW USES OF VERSION CONTROL
- Revert files to an original state
- Revert the entire project to an initial state
- Compare the alterations and changes over time
- See the details of last modifications
- Details of who introduced an issue and when it occurred
QUESTION: LIST THE AGILE METHODOLOGY OF DEVOPS?
- DevOps is a process
- Agile is same as DevOps.
- Separate group for are framed.
- It is problem solving.
- Developers managing production
- DevOps is development-driven release management
QUESTION: WHY COMPANIES NEED TO INCORPORATE DEVOPS?
- Increase deployment frequency
- Lower failure rate of new releases
- Shortened lead time between fixes
- Faster mean time to recovery in the event of new release crashing
PRACTICAL DEVOPS INTERVIEW QUESTIONS AND RECOMMENDED ANSWERS
QUESTION: EXPLAIN YOUR EXPERIENCE ON THE DEVOPS PROJECT?
Provide detailed answer that describes your role as a DevOps Engineer and how you were working as a part of the 24*7 and maybe in shifts, the projects involved in automating the CI and CD pipeline and providing support to the project teams.
Hence taking complete responsibility for maintaining and extending the environments for DevOps automation to more and more projects and different technologies (e.g. .NET, J2EE projects) involved within the organization.
Also, explain about the process (e.g. Agile) and tools that were involved in an end to end automation. You could also talk about your experience, if any, in DevOps support over the Cloud environment.
QUESTION: LIST OUT THE TOP DEVOPS TOOLS THAT YOU HAVE USED?
- Chef / Puppet /Ansible
- IBM Urbancode Deploy / CA-RA
- Nagios / Splunk
QUESTION: DESCRIBE THE TYPICAL ROLES INVOLVED IN DEVOPS
DevOps Architect – The leader who is responsible for the entire DevOps process.
DevOps Engineer – The person should be experienced with Agile, SCM or Version Control, CI /CD and setting up automation tools for the same, Infrastructure automation and Database management skills.
QUESTION: WHAT ARE YOUR EXPECTATIONS FROM A CAREER PERSPECTIVE OF DEVOPS?
To be associated with the start to finish, the delivery process and the most imperative part of enhancing the procedure so as to enable the development and operations teams to cooperate and see each other’s perspective on the workflow.
QUESTION: WHY ARE CONFIGURATION MANAGEMENT PROCESSES IMPORTANT?
Talk about multiple software builds, releases, revisions, and versions for each software or testware that is being developed. Move on to explain the need for storing and maintaining data, keeping track of development builds and simplified troubleshooting. Don’t forget to mention the key CM tools that can be used to achieve these objectives. Talk about how tools like Puppet, Ansible, and Chef help in automating software deployment and configuration on several servers.
The DevOps Interview questions in this guide should hopefully help you to crack any DevOps interview and set you up on the path of a great career in this field. Do share this useful resource with your friends and colleagues. Also, stay tune with Softwareguiders.com to get latest updates on Interview Resources, Interview Tips & Tricks!