Most important 30 DevOps Interview Questions and Answers

1. What is DevOps?

DevOps is a combination of technical practices, tools, & cultural philosophies that help in the automation and assimilation of software development and IT services.

2. List the technical and business benefits of DevOps

The technical and business benefits of DevOps are as follows- Technical Benefits

Faster detection and rectification of errors
Continuous delivery of software
Less complicated problems to handle

Business Benefits

High-stability functioning environments
Quick delivery of features
Renewed communication and collaboration among teams

3. How is DevOps different from Agile?

DevOps	Agile
DevOps is a combination of technical practices, tools, and cultural philosophies that help in the automation and assimilation of software development and IT services.	Agile is a time-bound agile project management methodology that follows an iterative approach that builds software in increments from the start till the completion of the project. It breaks down the larger project into phases and then builds the requirements in timeboxed iterations which typically last 2-4 weeks.
DevOps helps in managing end-to-end engineering concepts	Agile helps in managing large complicated projects
Concentrates on regular testing and delivery	Concentrates on frequent changes
The fundamental goal is collaboration so no rigid framework	Agile can be applied along with Scrum, SAFe, or a sprint

4. What does the acronym CAMS mean in DevOps?

The acronym CAMS stands for-

C- Culture
A- Automation
M- Measurement
S- Sharing

5. Name some of the DevOps tools

Some of the Popular DevOps tools are-

Selenium
Jenkins
Docker
Nagios
Chef
Git
Maven
Ansible

6. What is the meaning of the term ‘Continuous Integration’?

Continuous Integration is the practice of automating the merge of code changes from numerous developers into a single repository.

In the DevOps context, it improves the software quality, delivery time, and detection of bugs in the primary stages of development.

7. What are the key components of DevOps?

The key components of DevOps are-

Continuous Development
Continuous Integration
Continuous testing
Continuous Deployment
Continuous Monitoring
Continuous Feedback
Continuous Operations

8. Describe Git Bisect

Git Bisect assists you in finding the commit that introduced a bug using binary search.

9. What are the three main KPIs in DevOps?

The three main KPIs in DevOps-

Meantime to failure recovery- The average time taken to recover from failure
Deployment frequency- The frequency at which the deployment occurs
Percentage of failed deployments- The number of times a deployment fails

10. List the different phases of development in DevOps

The different phases of development in DevOps are-

Plan- There needs to be a plan for the type of application that needs to be developed.
Code- The application coding is written as per the requirements of the final customer
Build- Build the application by merging the codes done by the previous steps
Test- Test to see if there are any defects and solve defects that happen. Rebuild the application as necessary.
Integrate- Numerous codes by different developers are merged into one
Deploy- Deployment of the code is done in a cloud environment. This is done to make sure that a high-traffic website isn’t affected.
Operations- If code needs to be operated then the operation is performed
Monitor- Application performance is under surveillance. Changes are done to satisfy the user's requirements.

11. Define Continuous Testing

Continuous Testing in DevOps development lifecycle is testing at every stage of the

12. What are the advantages of using Git?

Using Git has the following advantages-

Helps in data replication and identifying redundancy
It is easily available
It endorses collaboration
Useful for numerous projects
Makes use of only one Git directory per repository
Assists disk utilization
Optimum work performance

13. Mention the anti-patterns in DevOps

A pattern followed by organizations owing to herd mentality just because it is in vogue without any rationale is called Anti-pattern. Here are some of the antipatterns in DevOps-

DevOps isn’t a culture but a process
DevOps and Agile are the same
DevOps is distinct hence there should be a separate group
DevOps is the answer to every problem
DevOps is synonymous with developers
DevOps is based on a development driven approach
DevOps isn’t for development
We are different from other organizations and hence DevOps isn’t required
We lack the human capital to implement the DevOps culture

14. What does the term ‘Canary Release’ mean?

Canary Release is a type of pattern that minimizes the risk of introducing a new version of software into the production environment. It is done by releasing the software to a smaller group of audience for testing before the larger release.

15. What is the list of prerequisites required to implement DevOps?

Implementing DevOps requires the below-mentioned prerequisites-

Minimum one version of Version control
Linear communication between team members
Automated testing
Automated deployment

16. Explain the difference between Continuous Delivery and Continuous Deployment

Here is the difference between Continuous Delivery and Continuous Deployment- Continuous Delivery

Makes sure the code can safely be deployed to production
Sees to it that the business application and services functioning isn’t hampered
Guarantees every change to production similar environment with the help of automated testing

Continuous Deployment

All changes that pass the automated tests is moved to the production environment
The software development life cycle is swifter and the release is on time
No requirement of precise approval from a developer and requires round-the-clock monitoring

17. What is CBD?

CBD is short for Component-based Development is a special approach to product development. This method helps developers to search for current tested, all-round, and verified components code that saves the developers time from creating the code from the beginning.

18. What is Resilience Testing?

Resilience Testing is a software development process that tests an application to assess its behavior in an uncontrolled and unpredictable environment. It seems to it that the data and functionality is not lost in case of failure.

19. What is Version Control?

Version Control is the practice of tracking and managing changes to software code.

20. What are the principles of DevOps?

The principles of DevOps are-

Infrastructure as code
Continuous Deployment
Automation
Monitoring
Security

21. Define Pair Programming

Pair Programming is an agile technique where two programmers work together in one workplace. One is an observer while the other is a driver, both continuously track the project progress.

22. List the different types of HTTP requests

The different types of HTTP requests-

CONNECT
DELETE
GET
HEAD
OPTIONS
PATCH
POST
PUT
TRACE

23. What is a Build?

A Build is a method wherein a source code is assembled together to check if it works as a solo unit. During the build creation process, the source code will go through compilation, inspection, testing, and deployment.

24. What is the use of configuration management in DevOps?

Configuration Management is a systems engineering process for building consistency for a product’s traits throughout its life.

25. Why is Selenium used in DevOps?

Selenium testing is used in DevOps for continuous testing. It supports functional and regression testing.

26. Define Containers

A container image is a lightweight, independent, executable package of a piece of software that includes everything needed to run it: code, runtime, system tools, system libraries, and settings.

27. What is the meaning of two-factor authentication?

Two-factor authentication is a security method where the user provides two ways of identification from separate categories.

28. What is a Vagrant?

A vagrant is a tool that can build and take care of virtualized environments for testing and developing software.

29. What are Post Mortem's meetings?

Post Mortem meetings are meetings that happen at the end of the project. It is conducted to discuss the failures, obstacles, and solutions to avoid them in the future. It is a critical assessment and review of a recently concluded project.

30. What is Forking Workflow?

Forking Workflow is an open-source project enabler that provides service-side repositories to support the same.

Conclusion

By now you would now be confident of facing DevOps interview questions. These 30 should help prepare you for the DevOps interview irrespective of your knowledge. Moreover, we have pinned down some of the lists of software required for the DevOps workshop. If you need help in starting a career in DevOps, we are just a mail away.

Agilemania

Agilemania, a small group of passionate Lean-Agile-DevOps consultants and trainers, is the most trusted brand for digital transformations in South and South-East Asia.

Top 30 DevOps Interview Questions & Answers (2023)

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