Top 250 DevOps Interview Questions and Answers

Docker has 3 main components: Docker Engine, Docker Images, and Docker Containers.

• Docker Engine is the core component responsible for running and managing Docker containers.

• Docker Images are read-only templates used to create Docker containers.

• Docker...read more

To point to any other branch in Jenkins, use the 'Branch specifier' field in the 'Source Code Management' section.

• In the Jenkins job configuration, go to the 'Source Code Management' section

• Select the appropriate SCM tool (e.g. Git, SVN)

• In the 'Branc...read more

Dynamic inventory is a feature in Ansible that allows for automatic inventory updates based on external data sources.

• Dynamic inventory can be configured to pull inventory information from sources such as cloud providers, configuration management data...read more

You can monitor the child pipeline in the master pipeline by using Azure Monitor or Azure Data Factory monitoring tools.

• Use Azure Monitor to track the performance and health of the child pipeline within the master pipeline.

• Leverage Azure Data Factory...read more

Deploy webapp into k8s by creating a deployment YAML file and applying it using kubectl command.

• Create a Docker image of the webapp

• Create a deployment YAML file with necessary specifications like image, replicas, ports, etc.

• Apply the deployment YAML ...read more

Jenkins is an open-source automation server that helps to automate the software development process.

• Jenkins is used for continuous integration and continuous delivery/deployment (CI/CD) pipelines.

• It can be used to build, test, and deploy software aut...read more

CI/CD pipeline is used in operations to automate the deployment process and ensure consistency and reliability.

• CI/CD pipeline is used to automate the build, test, and deployment process of applications.

• It ensures consistency and reliability by automa...read more

The most commonly used instructions in a Dockerfile include FROM, RUN, COPY, and CMD.

• FROM: Specifies the base image for the container

• RUN: Executes commands in the container

• COPY: Copies files and directories from the host to the container

• CMD: Specifie...read more

Jenkins is a CI/CD tool while Azure DevOps is a complete DevOps solution.

• Jenkins is open-source and can be hosted on-premises or in the cloud.

• Azure DevOps is a cloud-based solution that offers a range of DevOps services.

• Jenkins has a large number of ...read more

DevOps engineers are responsible for bridging the gap between development and operations teams.

• Automating deployment processes

• Monitoring system performance

• Collaborating with development and operations teams

• Ensuring system security and reliability

• Impl...read more

Write a yaml file for deployment kind

• Use 'kind: Deployment' to specify the type of deployment

• Include metadata like name and labels

• Define spec with containers, image, ports, etc.

AWS provides a wide range of services and tools that support the principles and practices of DevOps.

• AWS offers infrastructure as code tools like CloudFormation and Terraform for automating the provisioning of resources.

• AWS provides a variety of monit...read more

I will use various tools and techniques to identify and resolve container issues.

• Check container logs for any error messages

• Use container management tools like Docker Compose to inspect containers

• Check resource utilization of containers and host mach...read more

Terraform modules are reusable components that allow you to encapsulate and organize your infrastructure code.

• Modules help in creating reusable infrastructure components

• They allow for better organization and encapsulation of code

• Modules can be shared...read more

CI/CD pipelines are automated processes that build, test, and deploy code changes to production.

• CI/CD stands for Continuous Integration/Continuous Deployment

• CI involves automatically building and testing code changes as they are made

• CD involves autom...read more

When SonarQube fails in Jenkins, the code quality analysis will not be performed and potential issues in the code will not be identified.

• SonarQube plugin in Jenkins will report a failure in the build job

• Developers will not receive feedback on code qu...read more

Packer is used for creating identical machine images for multiple platforms from a single source configuration.

• Packer helps in automating the process of creating machine images for different platforms like AWS, Azure, VMware, etc.

• It allows for consis...read more

The ansible inventory file defines the hosts and groups that ansible can manage.

• Hosts and groups are defined using INI or YAML syntax

• Hosts can have variables defined for them

• Groups can have child groups and variables defined for them

• Inventory files c...read more

To create a Jenkins pipeline, I follow these steps:

• Define the stages and steps of the pipeline

• Create a Jenkinsfile with the pipeline code

• Configure Jenkins to use the Jenkinsfile

• Test the pipeline and make necessary adjustments

• Integrate with version co...read more

Configuration management is crucial in DevOps for consistency, scalability, and automation.

• Ensures consistency across environments

• Facilitates scalability by automating infrastructure changes

• Enables automation of deployment and testing processes

• Helps ...read more

DevOps architecture is a software development approach that combines development and operations teams to improve collaboration and efficiency.

• DevOps emphasizes automation, continuous integration, and continuous delivery.

• It involves using tools like J...read more

Jenkins pipeline is a way to define and automate the steps in your software delivery process.

• Allows you to define your build process as code

• Enables you to automate the entire software delivery process

• Supports both declarative and scripted syntax

• Provi...read more

Ansible variables can be used to store and retrieve values in playbooks and templates.

• Variables can be defined in inventory files, playbooks, or roles

• Variables can be accessed using the {{ variable_name }} syntax

• Variables can be set using the set_fac...read more

Docker Namespaces are a feature in Docker that isolates containers from each other and the host system.

• Namespaces provide a way to isolate processes, network, and filesystem for containers.

• Examples of namespaces include PID (process IDs), NET (networ...read more

Helm2 is Tiller-based, Helm3 is Tiller-less. Helm3 has improved security, performance, and reliability.

• Helm2 relies on Tiller for managing releases, Helm3 removes Tiller completely.

• Helm3 has improved security by removing Tiller, reducing attack surfa...read more

CI pipe is a tool used in continuous integration to automate the build, test, and deployment process.

• CI pipe stands for Continuous Integration Pipeline

• It is used to automate the software development process

• It helps in building, testing, and deploying...read more

Explanation of Kubernetes YAML file

• Kubernetes YAML files are used to define and deploy applications on a Kubernetes cluster

• They contain information about the application's containers, volumes, services, and other resources

• YAML files can be used to cr...read more