Freelancer.com Devops Engineer Interview Questions, Process, and Tips

Q1. What is the agile methodology?
Ans. 
Agile methodology is a project management approach that emphasizes flexibility, collaboration, and incremental progress.
• Agile focuses on delivering small, incremental releases and adapting to change quickly.

• It promotes collaboration between cross-functional teams and encourages frequent communication.

• Key principles include customer satisfaction, responding to change, and delivering working software.

• Common agile framewo...read more
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Q2. What is the waterfall model in software development?
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Waterfall model is a linear sequential software development process where progress flows in one direction like a waterfall.
• Involves distinct phases such as requirements, design, implementation, testing, and maintenance.

• Each phase must be completed before moving on to the next.

• Changes are difficult to implement once a phase is completed.

• Example: Traditional software development approach.

• Example: Construction projects.
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Q1. Regarding AWS networking, Jenkins, Terraform, Linux
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Q2. Write dockerfile to run python script.
Ans. 
Dockerfile to run a Python script
• Use a base Python image as the starting point

• Copy the Python script into the container

• Specify the command to run the Python script
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Q3. Run vs CMD vs ENTRYPOINT.
Ans. 
Run vs CMD vs ENTRYPOINT are Docker instructions used to specify commands to be executed when a container is launched.
• RUN is used to execute commands during the build of the image

• CMD is used to provide default arguments for the entrypoint or to specify the command to run when the container starts

• ENTRYPOINT is used to specify the executable that will run when the container starts, and CMD can be used to provide addition...read more
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Q4. How to upgrade kubernetes cluster version
Ans. 
To upgrade a Kubernetes cluster version, you can use kubeadm tool or manually update each component.
• Use kubeadm tool to upgrade the cluster version

• Check the current version of the cluster using kubectl

• Upgrade the control plane components first, followed by worker nodes

• Ensure compatibility of applications with the new version before upgrading

• Backup important data and configurations before upgrading
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Q5. Terraform file to provision ec2 instance and import existing instance with their configuration
Ans. 
Use Terraform to provision ec2 instance and import existing instance with their configuration
• Create a Terraform configuration file with necessary resources like aws_instance

• Use the import command to import existing instance with their configuration

• Update the Terraform configuration file with the imported instance details

• Apply the Terraform configuration to provision the ec2 instance
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Q1. Basics of Devops., Jenkins and basics of kubctl
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Aptitude was mix of questions from logical reasoning, english grammar to simple numerical problems.

Q1. Questions were regarding projects done.
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Q1. S3 storage class
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Questions based on general aptitude

Q1. Tell me more about yourself Where you see yourself in 5 year ?
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Q1. Troubleshooting with EKS
Ans. 
Troubleshooting with EKS involves identifying and resolving issues within an Amazon EKS cluster.
• Check the status of EKS nodes and pods

• Review logs for errors and warnings

• Verify network connectivity within the cluster

• Monitor resource utilization to identify bottlenecks

• Use kubectl commands to inspect and troubleshoot
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Q2. S3 storage classes
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Q1. Explain Project and roles and responsibilities
Ans. 
A project is a temporary endeavor with a specific goal, roles and responsibilities define the tasks and duties of team members.
• Project is a temporary endeavor to achieve a specific goal within a defined timeframe and budget.

• Roles and responsibilities outline the tasks and duties of team members to ensure successful project completion.

• Examples of roles include project manager, developer, tester, and operations engineer.

• ...read more
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Q2. CICD setups with different tools
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CICD setups involve integrating various tools for automation and continuous delivery.
• Use Jenkins for building, testing, and deploying code

• Integrate with version control systems like Git for source code management

• Utilize Docker for containerization and Kubernetes for orchestration

• Implement monitoring tools like Prometheus and Grafana for tracking performance

• Automate testing with tools like Selenium or JUnit
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