What is the default networking mode in Docker Compose when no explicit network configuration is provided?
Bridge
None
Host
Overlay
What is a significant benefit of using a volume driver that supports cloud storage?
Enhanced data durability and availability through redundancy and backups.
Increased complexity in managing data.
Improved performance for data-intensive applications.
Reduced need for data backups and disaster recovery planning.
What is the primary function of a Docker Registry?
Running Docker containers in production
Building Docker images
Storing and distributing Docker images
Managing network traffic between containers
What is the role of a Docker registry in a CI/CD pipeline?
To store and manage Docker images
To define the steps of the continuous integration process
To execute automated tests within isolated containers
To monitor application performance in real-time
How does Docker optimize build cache for the RUN instruction?
RUN
It caches the result of each individual command within a RUN instruction.
It caches the entire file system state after each RUN instruction.
It does not cache the results of RUN instructions.
It only caches the output of the RUN command if it has changed.
How can you control access to images stored in a private Docker Registry?
By configuring network firewalls to restrict access by IP address
By implementing authentication and authorization mechanisms within the registry
By using encryption to secure images during transmission
By regularly updating the registry software to patch vulnerabilities
What role does a manager node play in a Docker Swarm cluster?
Stores and distributes Docker images to worker nodes
Provides networking and load balancing for the cluster
Executes the actual application tasks within containers
Manages cluster state, schedules tasks, and ensures service availability
When scaling a service with Docker Compose, what happens to data stored within the container's writable layer?
Data is persisted only in the original container instance; scaled instances have their own independent data
Data is automatically replicated across all instances of the scaled service
Scaling a service with data persistence requires manual configuration of shared volumes or external data stores
Docker Compose automatically creates a shared volume for the scaled service, ensuring data consistency
Which statement accurately describes a drawback of using bind mounts for sensitive data?
Bind mounts are not supported in the latest versions of Docker.
Bind mounts can expose parts of the host's filesystem to containers, potentially leading to security risks.
Bind mounts provide enhanced security for storing sensitive data.
Bind mounts are less efficient than Docker volumes for handling large data volumes.
What is the primary advantage of using Docker volumes over bind mounts for data persistence?
Volumes are managed by Docker and provide data portability across different host environments.
Bind mounts are easier to back up and restore compared to Docker volumes.
Bind mounts are generally more secure than Docker volumes.
Volumes offer better performance compared to bind mounts.