10+ Junior DevOps Engineer Interview Questions and Answers

DevOps is a set of practices that combines software development and IT operations to shorten the development lifecycle.

• Collaboration: DevOps fosters a culture of collaboration between development and operations teams, improving communication and efficiency.

• Automation: It emphasizes automation of processes like testing, deployment, and infrastructure management to reduce manual errors.

• Continuous Integration/Continuous Deployment (CI/CD): DevOps practices include CI/CD, allowin...read more

No, an EC2 server cannot be launched without a security group.

• A security group acts as a virtual firewall for an EC2 instance.

• It controls inbound and outbound traffic to the instance.

• By default, a new EC2 instance is associated with a default security group.

• However, it is not possible to launch an EC2 instance without any security group.

Ansible is an open-source automation tool for configuration management, application deployment, and task automation in DevOps.

• Agentless Architecture: Ansible operates without agents, using SSH for communication, simplifying management and reducing overhead.

• Playbooks: Ansible uses YAML-based playbooks to define automation tasks, making it easy to read and write configurations.

• Idempotency: Ansible ensures that tasks are idempotent, meaning running the same playbook multiple tim...read more

Terraform is an open-source infrastructure as code tool that allows users to define and provision infrastructure using a declarative configuration language.

• Infrastructure as Code: Terraform enables users to manage infrastructure through code, allowing for version control and collaboration.

• Declarative Configuration: Users define the desired state of infrastructure, and Terraform automatically manages the changes needed to achieve that state.

• Provider Support: Terraform supports...read more

My highest completed qualification is a Bachelor's degree in Computer Science.

• I have completed a Bachelor's degree in Computer Science.

• I have also completed various online courses and certifications related to DevOps.

• I am constantly learning and improving my skills to stay up-to-date with the latest technologies and trends.

I have knowledge on various DevOps tools.

• Continuous Integration/Continuous Deployment (CI/CD) tools like Jenkins, Travis CI, CircleCI

• Configuration Management tools like Ansible, Chef, Puppet

• Containerization tools like Docker, Kubernetes

• Infrastructure as Code (IaC) tools like Terraform, CloudFormation

• Monitoring and Logging tools like Nagios, Prometheus, ELK Stack

• Version Control tools like Git, SVN

Deploying applications on AWS involves using services like EC2, S3, and Elastic Beanstalk for scalable solutions.

• Use Amazon EC2 to launch virtual servers for your application.

• Store static assets in Amazon S3 for easy access and scalability.

• Utilize AWS Elastic Beanstalk for automated deployment and scaling.

• Implement AWS Lambda for serverless applications that respond to events.

• Use Amazon RDS for managed database services to support your application.

Docker is a platform for containerization, while Kubernetes is an orchestration tool for managing those containers at scale.

• Docker allows developers to package applications and their dependencies into containers, ensuring consistency across environments.

• Kubernetes automates the deployment, scaling, and management of containerized applications, making it easier to handle large-scale systems.

• With Docker, you can run applications in isolated environments, reducing conflicts betw...read more

My expected CTC is based on my experience, skills, industry standards, and the responsibilities of the role.

• My expected CTC is in line with industry standards for Junior DevOps Engineers.

• I have taken into consideration my experience and skills when determining my expected CTC.

• I am open to negotiation based on the responsibilities and benefits offered by the company.

Deploying an app in EKS involves creating a cluster, configuring resources, and applying Kubernetes manifests.

• 1. Create an EKS cluster using AWS Management Console or CLI.

• 2. Configure kubectl to connect to your EKS cluster: 'aws eks --region region update-kubeconfig --name cluster_name'.

• 3. Define your application in a Kubernetes deployment YAML file.

• 4. Apply the deployment using 'kubectl apply -f deployment.yaml'.

• 5. Expose your application using a service: 'kubectl expose dep...read more

Open source refers to software that is freely available to use, modify, and distribute.

• Open source software is typically developed collaboratively by a community of developers.

• The source code is made available to the public, allowing anyone to view and modify it.

• Examples of open source software include Linux, Apache, and WordPress.

• Open source software is often free to use and distribute, but may have certain licensing requirements.

• Open source promotes transparency, collaborat...read more

Kubernetes is a container orchestration platform that automates deployment, scaling, and management of containerized applications.

• Master Node: Controls the Kubernetes cluster, managing the API server, scheduler, and controller manager.

• Worker Nodes: Run the applications in containers, managed by the kubelet and container runtime.

• Pods: The smallest deployable units in Kubernetes, which can contain one or more containers.

• Services: Abstract a set of pods and provide a stable endp...read more

Troubleshooting in real-time involves identifying and resolving issues quickly in a DevOps environment.

• Check logs for error messages to identify the root cause.

• Use monitoring tools (e.g., Prometheus, Grafana) to visualize system performance.

• Verify configurations in version control to ensure no recent changes caused the issue.

• Reproduce the issue in a staging environment to test potential fixes.

• Engage with team members for collaborative troubleshooting and knowledge sharing.