IBM Devops Engineer Interview Questions and Answers

Containers are lightweight, portable, and isolated environments that package applications and their dependencies.

• Containers are instances of images that include the application and all its dependencies, allowing for easy deployment and scaling.

• Docker is a popular containerization platform that uses Dockerfiles to define the image build process.

• Docker-compose is a tool for defining and running multi-container Docker applications.

• Kubernetes is a container orchestration platform...read more

Azure DevOps is a comprehensive platform for managing the software development lifecycle, from version control to deployment.

• Azure DevOps includes tools for version control (Git), continuous integration/continuous deployment (CI/CD), project management, and collaboration.

• Developers can use Git repositories in Azure DevOps to manage their source code, track changes, and collaborate with team members.

• Azure Pipelines in Azure DevOps allows for automated build and deployment proc...read more

A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image.

• Start with a base image (e.g. FROM ubuntu:latest)

• Install dependencies and set up environment (e.g. RUN apt-get update && apt-get install -y python3)

• Copy application code into the image (e.g. COPY . /app)

• Set the default command to run when the container starts (e.g. CMD ["python3", "app.py"])

• Build the Docker image using the Dockerfile (e.g. docker build -t ...read more

Continuous integration through Jenkins involves automating the build and testing process to ensure code changes are integrated frequently.

• Jenkins is a popular CI/CD tool used for automating the build, test, and deployment process.

• Developers commit code changes to a shared repository multiple times a day.

• Jenkins automatically triggers a build process whenever new code is committed.

• The build process includes compiling the code, running automated tests, and generating artifacts....read more

Java program to reverse a string using StringBuilder

• Create a StringBuilder object with the input string

• Use the reverse() method of StringBuilder to reverse the string

• Convert the reversed StringBuilder object back to a string using toString()