- What DevOps is? Why do we need it?
- Example of answers:
- Why do we need it?
- 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
- What DevOps is?
- CALMS
- C – Culture (promotes collaborative and open culture between Dev and Ops)
- A – Automation (automate wherever applicable)
- L- Learning (continuous learning & experimentation)
- M – Measure (Measure with shared metrics across the Dev and ops for better management)
- S – Sharing (Shared delivery process across Dev and Ops to build , deploy, maintain and monitor product with mentality of One Team – One Goal)
- Why do we need it?
- Example of answers:
- What is the purpose of a post-mortem meeting?
- What is meant by Continuous Integration?
- What are the success factors for Continuous Integration?
- Examples of answers:
- Maintain a code repository
- Automate the build
- Make the build self-testing
- Everyone commits to the baseline every day
- Every commit (to baseline) should be built
- Keep the build fast
- Test in a clone of the production environment
- Make it easy to get the latest deliverables
- Everyone can see the results of the latest build
- Automate deployment
- Examples of answers:
- How would you implement CI (continuous delivery) – end to end, including source control, branches, tools, etc. ?
- What is Continuous Delivery? Continuous Deployment?
- What is the difference between Continuous Integration, Continuous Delivery and Continuous Deployment?
- What’s the difference between git and git-hub ? What about git and SVN ?
- What is
git rebase? - In Git how do you revert a commit that has already been pushed and made public?
- What is puppet/chef/ansible used for? What are the advantages over shell scripts ?
- What do you understand by “Infrastructure as code”? How does it fit into the DevOps methodology? What purpose does it achieve?
- How do you give your developers access to the production logs ?
- Tell me about the worst-run/best-run outage you’ve been a part of. What made it bad/well-run?
- How do you monitor your application ? How do you make sure it is working ? How do you get alerts when it stops working ?
- What would be the availability and performance metrics for a key value store ? What about for MySQL replication ?
- How would you deploy software to 5000 systems?
- What is caching ? Where should a large scale application cache, and what data should be cached ?
I’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and Platform Engineering expert passionate about sharing practical knowledge, real-world experiences, and industry best practices. I have worked at Cotocus and regularly write about technology, travel, investing, health, product reviews, and digital marketing through my various platforms.
I publish technical articles at DevOps School, travel stories at Holiday Landmark, stock market insights at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow, and SEO and digital marketing strategies at Wizbrand.
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