Top 20 Interview Questions & Answers for DevOps Engineer Roles – 2025

Preparing for a DevOps engineer job interview? This guide provides a list of essential questions and answers that will help you showcase your technical expertise, problem-solving abilities, and experience working with AWS tools. Whether you’re applying for a role as a DevOps engineer, AWS engineer, or cloud engineer, these questions cover all key areas of the job.

General Questions

• 1. Tell us about your experience working with AWS tools.
  As a DevOps engineer, I have extensive experience using a variety of AWS tools such as EC2, RDS, S3, Lambda, and CloudFormation. I have used these tools to build and deploy cloud infrastructure, automate processes, and improve the overall efficiency of applications.
• 2. How do you stay updated with the latest trends and updates in AWS?
  I regularly attend online webinars, workshops, and events hosted by AWS to stay updated with the latest trends and updates. I also subscribe to blogs and newsletters and follow AWS experts on social media to stay informed.
• 3. Can you walk us through a project where you had to troubleshoot and resolve issues with AWS infrastructure?
  In my previous role, we experienced frequent downtime in one of our applications due to issues with the AWS infrastructure. After analyzing the logs and monitoring metrics, I identified the root cause and implemented a solution using AWS CloudWatch alarms and Auto Scaling. This reduced our downtime significantly.
• 4. How do you ensure the security and scalability of AWS infrastructure?
  I follow best practices for security and scalability, such as implementing IAM roles, network security, and using Auto Scaling and Elastic Load Balancing. I also regularly monitor and perform security audits to identify and fix any vulnerabilities in the infrastructure.
• 5. How do you handle deployment and rollback processes in AWS?
  I use AWS CodeDeploy for automatic deployments. This allows me to roll back to a previous version in case of any errors. I also follow a blue/green deployment strategy to minimize downtime and ensure a smooth rollout.

Behavioral Questions

• 6. Tell us about a time when you had to work under pressure to resolve an issue with AWS infrastructure.
  In my previous role, we experienced a sudden surge in traffic to our application, causing high CPU usage and frequent downtime. I worked under pressure to scale up our AWS infrastructure and implement autoscaling policies. This resolved the issue and prevented any further downtime.
• 7. Can you explain a situation where you had to collaborate with a cross-functional team to deliver a project using AWS?
  In my current role, I had to work with the development, QA, and operations team to migrate our application to AWS. I collaborated with the team to design the infrastructure and implement automated testing and deployment processes. The project was successfully delivered within the given timeframe.
• 8. How do you prioritize your tasks and manage your time effectively while working on multiple AWS projects?
  I use project management tools such as Trello and Asana to prioritize my tasks and manage my time effectively. I also communicate regularly with the team to understand their priorities and ensure that I am working on the most critical tasks first.
• 9. How do you handle unexpected changes or problems in the AWS environment?
  In such situations, I first assess the impact of the change or problem and communicate it to the relevant stakeholders. Then, I work with the team to identify the root cause and come up with a solution to resolve it. I also document the incident and implement measures to prevent it from happening again in the future.
• 10. Tell us about a time when you had to mentor or train a team member on AWS best practices.
  In my previous role, I had the opportunity to onboard a new team member and train them on AWS best practices. I created a training plan and hands-on exercises to help them understand the core concepts and how to use various AWS tools effectively. This helped our team become more proficient in AWS and improved our overall productivity.

Situational Questions

• 11. How would you handle a situation where an application crashes and is not responding to user requests?
  Firstly, I would check the logs and monitoring metrics to identify the root cause of the issue. If it is due to high load, I would scale up the infrastructure using Auto Scaling and Elastic Load Balancing. If the issue is with the code, I would roll back to a previous version using AWS CodeDeploy and investigate the issue further.
• 12. You have to deploy an application that requires a load balancer, but there are security concerns. How would you handle this situation?
  I would recommend using AWS Network Load Balancer, which allows for secure and scalable load balancing. It offers advanced routing and monitoring capabilities, keeping security concerns in mind.
• 13. How do you handle situations where there is a sudden increase in traffic to an application and the infrastructure cannot handle it?
  In such cases, I would set up automated scaling policies using AWS Auto Scaling to increase the capacity of the infrastructure on demand. This would ensure that the application can handle sudden spikes in traffic without any downtime.
• 14. How would you handle a situation where multiple teams are using the same AWS resources and there are conflicts in resource allocation?
  I would suggest implementing AWS resource tags to organize and manage resources efficiently. This enables teams to have their own set of resources while avoiding conflicts. I would also communicate with the teams to ensure they are following best practices for resource allocation.
• 15. You have to migrate an existing application from an on-premises server to AWS. How would you approach this task?
  I would start by assessing the application and identifying any dependencies on the current infrastructure. Then I would design the AWS infrastructure, set up network connectivity, and migrate the data. Finally, I would run extensive tests to ensure the application is running smoothly.

Cultural Fit Questions

• 16. Why do you want to work for our organization as a DevOps engineer?
  I am attracted to your organization's focus on innovation and cutting-edge technology. Your company's values align with my passion for continuous learning and implementing best practices, making it an ideal environment for a DevOps engineer like myself.
• 17. How do you keep track of new AWS services and updates?
  I believe in continuous learning and staying updated with the latest trends and updates in technology. I regularly attend webinars, workshops, and events and also follow AWS experts and blogs to keep track of new services and updates.
• 18. How do you handle conflicts or disagreements with team members?
  I believe in open and effective communication as key to resolving conflicts. I would listen to the team members' perspectives and work together to find a mutually beneficial solution. I also believe in giving credit where it is due and celebrating team success.
• 19. How do you handle working on multiple projects with tight deadlines?
  I thrive under pressure and believe in managing my time effectively. I prioritize tasks based on urgency and communicate with the team to ensure we are working efficiently towards our goals. I am also proactive in identifying and addressing any potential roadblocks to meet deadlines.
• 20. Why should we hire you for this DevOps engineer role?
  With my extensive experience in AWS and DevOps, I am confident in my abilities to help your organization achieve its goals efficiently. I am passionate about continuous improvement and am always willing to learn and adapt to new technologies and processes. I am also a team player and believe in delivering high-quality work, making me an ideal fit for this role.