Which flag is used with 'docker logs' to follow log output in real-time?
-f
-d
-t
-r
What is a key benefit of using a private Docker Registry in a continuous integration/continuous deployment (CI/CD) pipeline?
It enables faster and more controlled image distribution within the pipeline.
It eliminates the need for image version control.
It allows for easier public image discovery.
It simplifies the process of building images from source code.
What is the primary advantage of using multi-stage builds in Docker?
To simplify the process of building complex applications.
To improve network performance during the build process.
To reduce the size of the final Docker image.
To enable parallel execution of build steps.
What is the purpose of 'docker exec' command?
To build a Docker image from a Dockerfile
To list all available Docker images
To execute a command inside a running container
To push a Docker image to a registry
What is the primary advantage of using Docker containers in a CI/CD pipeline?
Elimination of the need for version control
Reduced storage footprint for build artifacts
Guaranteed execution on any operating system
Enhanced environment consistency across development, testing, and production
What is the purpose of the ONBUILD instruction in a Dockerfile?
ONBUILD
To specify the base image for the Dockerfile.
To specify environment variables that will be available at build time.
To define commands that will be executed when the container starts.
To define commands that will be executed when a new image is built FROM the current image.
How can you invalidate the Docker build cache for a specific instruction?
By deleting the corresponding image layer.
By using the --no-cache flag during the build process.
--no-cache
All of the above.
By modifying the instruction itself.
What is a key advantage of using Docker with Jenkins for deployments?
Docker automatically scales applications based on real-time traffic
Docker eliminates the need for orchestration tools like Kubernetes
Docker handles database migrations as part of the deployment process
Docker enables immutable deployments, ensuring consistent application versions across environments
What is the primary way to define and deploy applications in a Docker Swarm?
Kubernetes Deployments
Docker Swarm stacks
Dockerfiles
Docker Compose files
You want to execute 'ls -l' inside a container named 'app-server' and allocate a pseudo-TTY. Which command is correct?
docker exec -it app-server ls -l
docker run -it app-server ls -l
docker exec app-server -it ls -l
docker exec -d app-server ls -l