How to Prepare for DevOps Interviews (Complete Guide for DevOps, SRE & Production Engineers)
DevOps interviews can be challenging because they test knowledge across multiple domains such as Linux, cloud infrastructure, automation, scripting, and system design.
If you are preparing for a DevOps Engineer, Site Reliability Engineer (SRE), or Production Engineer role, you need a clear strategy to cover the most important technical areas.
In this guide, we will explain how to prepare for DevOps interviews step-by-step, including the key skills you should develop, practical preparation strategies, and common interview scenarios used by companies today.
Skills Required for DevOps Interviews
To succeed in a DevOps interview, you must develop strong skills in several technical areas. Below are the most important ones.
Linux Skills Required for DevOps Engineers
Every DevOps engineer should have a deep understanding of at least one operating system. In most cases, that operating system should be Linux.
Linux is widely used in:
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Cloud infrastructure
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Containers
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Web servers
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Production systems
Because of this, most DevOps job descriptions require Linux knowledge.
How deep should your Linux knowledge be?
Linux and programming should be your strongest technical skills.
You should understand:
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Process management
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Filesystem structure
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Networking basics
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System logs
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Performance monitoring
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Troubleshooting techniques
During DevOps interviews, candidates are often asked to diagnose system issues, so understanding how the operating system works internally is extremely important.
Programming Skills Needed for DevOps Engineers
Programming is another essential skill for DevOps engineers.
With programming knowledge, you can:
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Automate repetitive tasks
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Build internal tools
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Improve existing infrastructure
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Create custom deployment scripts
In DevOps, automation is everything, and programming enables that automation.
The required level of programming varies between companies.
Some organizations only expect candidates to write automation scripts, while others may test algorithms and data structures.
How to practice coding for DevOps interviews
The best way to improve coding skills is through regular practice.
You can practice by building:
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automation scripts
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command-line tools
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small web applications
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DevOps utilities
Coding challenge platforms are also useful for interview preparation.
Recommended platforms include:
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Exercism
Important tip:
If an interview allows you to choose your programming language, always select the language you are most comfortable with.
Using a familiar language increases your chances of solving problems correctly.
System Design Questions in DevOps Interviews
DevOps engineers are often responsible for designing infrastructure and deployment systems.
Because of this, many interviews include system design discussions.
You may be asked to design systems such as:
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logging infrastructure
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monitoring systems
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distributed applications
Another important factor in system design is scale.
A system that works well for a few servers may not work efficiently for thousands of servers or millions of users.
Example system design topics to practice
Some useful practice scenarios include:
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Designing a CI/CD pipeline that runs automated tests and deploys applications.
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Creating a logging architecture that collects logs from thousands of applications.
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Designing a scalable microservices infrastructure.
Being able to explain systems you have built in previous projects is very valuable during interviews.
DevOps Tools You Should Know
DevOps engineers work with many tools, and interviewers often ask detailed questions about them.
Most questions will be related to:
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tools listed in your resume
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tools mentioned in the job description
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tools used by the company
For every tool you mention, you should be able to explain:
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What problem the tool solves
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How the tool works
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Why it is better than alternatives
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How you use it in real environments
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Best practices for using it
Understanding the concepts behind tools is more important than memorizing commands.
Practical DevOps Interview Preparation Strategies
Many companies now evaluate candidates using real-world tasks instead of theoretical questions.
Candidates may receive a task that simulates a real DevOps challenge.
These tasks may involve:
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building infrastructure
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writing automation scripts
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designing deployment pipelines
Sometimes candidates are given several hours or even days to complete these tasks.
Build Your Own DevOps Project
Starting a personal DevOps project is one of the best ways to prepare for interviews.
Benefits of building a project include:
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improving coding skills
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gaining practical DevOps experience
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learning system architecture
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adding strong projects to your resume
Your project does not need to be perfect. The goal is to build something practical and learn from the process.
Practice Common DevOps Interview Questions
Another useful preparation method is practicing interview questions.
Try to prepare answers for topics such as:
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DevOps tools
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CI/CD pipelines
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Linux troubleshooting
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cloud infrastructure
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automation
You should be able to explain your answers clearly and confidently.
Mock interviews with friends or colleagues can also help identify knowledge gaps.
Networking With Other Engineers
Attending technical meetups and conferences can help you learn more about DevOps interviews.
Conversations with engineers from other companies may give you insights into:
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interview processes
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technical expectations
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preparation strategies
Networking is also a great way to discover new opportunities.
Remember: You Are Also Interviewing the Company
Interviews are not only about companies evaluating candidates.
Candidates should also evaluate whether the company is a good fit.
Some questions you might consider include:
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Is the team size suitable for me?
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Does the company support work-life balance?
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Are there opportunities for career growth?
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Are responsibilities clearly defined?
Choosing the right company is just as important as getting the job.
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