Docker вопросы и ответы для интервью
Вопрос 6. What is the difference between a Docker image and a Docker container?
An image is a lightweight, standalone, and executable package that includes everything needed to run a piece of software. A container is a runtime instance of a Docker image.
Example:
docker run -d my_image
Вопрос 7. How do you remove all Docker containers?
You can use the following command to remove all Docker containers: docker rm $(docker ps -a -q)
Example:
docker rm $(docker ps -a -q)
Вопрос 8. Explain the concept of Docker Volumes.
Docker Volumes are used to persist data generated by and used by Docker containers. They provide a way to share data between containers and persist data even if the container is removed.
Example:
docker run -v /path/on/host:/path/in/container my_image
Вопрос 9. What is the role of a Dockerfile in Docker?
A Dockerfile is a script that contains a set of instructions to build a Docker image. It defines the base image, adds application code, sets environment variables, and configures the container.
Example:
FROM node:14
WORKDIR /app
COPY . .
RUN npm install
CMD ["npm", "start"]
Вопрос 10. How does Docker Swarm differ from Kubernetes?
Docker Swarm and Kubernetes are both orchestration tools for managing containerized applications. Kubernetes is more feature-rich and widely adopted, while Docker Swarm is simpler to set up and use for smaller deployments.
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