What is the primary advantage of using Docker containers in a CI/CD pipeline?
Guaranteed execution on any operating system
Elimination of the need for version control
Reduced storage footprint for build artifacts
Enhanced environment consistency across development, testing, and production
What is the purpose of volume drivers in Docker?
To improve the performance of volume operations.
To restrict container access to specific volumes.
To enable the use of remote storage or cloud-based solutions for volumes.
To manage the lifecycle of bind mounts.
What is the primary purpose of Docker Swarm?
Deploying and managing containerized applications at scale
Storing and versioning Docker images
Building Docker images faster
Scanning Docker images for vulnerabilities
What is the purpose of the ONBUILD instruction in a Dockerfile?
ONBUILD
To specify environment variables that will be available at build time.
To define commands that will be executed when a new image is built FROM the current image.
To define commands that will be executed when the container starts.
To specify the base image for the Dockerfile.
When choosing a data persistence strategy in Docker, which factor should be considered carefully?
The number of containers running on the host.
The color scheme of the Docker logo.
The version of Docker being used.
The sensitivity and importance of the data being stored.
What information does the 'docker inspect' command provide?
A list of all environment variables in a container
Low-level information about a container, image, or network
The status (running/stopped) of a container
Real-time resource usage of a running container
What is the role of authentication tokens in the context of a Docker Registry?
They provide temporary access credentials for interacting with the registry.
They define the network routes for communication between the registry and clients.
They are used to digitally sign images to ensure their integrity.
They are used to encrypt images stored in the registry.
How does Docker contribute to improved security in CI/CD?
Docker's containerization provides isolation, limiting the impact of vulnerabilities
Docker automatically encrypts data at rest and in transit
Docker eliminates the need for security updates by isolating applications
Docker enforces strict access control policies on application code
What is the primary advantage of using multi-stage builds in Docker?
To enable parallel execution of build steps.
To improve network performance during the build process.
To simplify the process of building complex applications.
To reduce the size of the final Docker image.
Which data persistence approach provides the highest level of isolation between the host system and container data?
Using a shared network drive.
Docker volumes.
Directly writing data to the container's filesystem.
Bind mounts.