Docker Interview Questions Your Guide to Success
Docker revolutionizes software delivery with containerization. Jobpe provides interview questions that prepare you for roles involving container management and orchestration.
docker
- DevOps
What is Docker and what problems does it solve?
Docker is a containerization platform that packages applications and their dependencies into containers to ensure...
Explain the difference between Docker images and Docker containers.
Docker images are read-only templates used to create containers, which are runnable instances of these images.
How does Docker manage networking between containers?
Docker uses virtual networks to allow containers to communicate, with bridge networks being the default for...
What is a Dockerfile and how is it used?
A Dockerfile is a script containing instructions to build a Docker image by specifying the base image, files,...
Describe the process of building and running a Docker container.
You build an image using a Dockerfile, then run a container instance from that image with the docker run command.
How do volumes work in Docker?
Volumes provide persistent storage for Docker containers, allowing data to persist independently of container lifecycle.
Explain the concept of Docker Compose.
Docker Compose is a tool for defining and managing multi-container Docker applications using a YAML file.
What are the security considerations when using Docker?
Security best practices include limiting container privileges, keeping images up to date, and scanning images for...
How does Docker differ from traditional virtual machines?
Docker containers share the host OS kernel and are more lightweight, whereas virtual machines run full OS instances,...
What strategies can be used to optimize Docker image sizes?
Strategies include using minimal base images, multi-stage builds, and removing unnecessary files during the build process.
DevOps
What is Docker and what problems does it solve?
Docker is a containerization platform that packages applications and their dependencies into containers to ensure consistency across different environments.
Explain the difference between Docker images and Docker containers.
Docker images are read-only templates used to create containers, which are runnable instances of these images.
How does Docker manage networking between containers?
Docker uses virtual networks to allow containers to communicate, with bridge networks being the default for standalone containers.
What is a Dockerfile and how is it used?
A Dockerfile is a script containing instructions to build a Docker image by specifying the base image, files, commands, and environment.
Describe the process of building and running a Docker container.
You build an image using a Dockerfile, then run a container instance from that image with the docker run command.
How do volumes work in Docker?
Volumes provide persistent storage for Docker containers, allowing data to persist independently of container lifecycle.
Explain the concept of Docker Compose.
Docker Compose is a tool for defining and managing multi-container Docker applications using a YAML file.
What are the security considerations when using Docker?
Security best practices include limiting container privileges, keeping images up to date, and scanning images for vulnerabilities.
How does Docker differ from traditional virtual machines?
Docker containers share the host OS kernel and are more lightweight, whereas virtual machines run full OS instances, making them heavier.
What strategies can be used to optimize Docker image sizes?
Strategies include using minimal base images, multi-stage builds, and removing unnecessary files during the build process.
