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Docker Security and Best Practices
Test how well you understand image security,user permissions,and vulnerability scanning.
1. What is the default user context in a Docker container when no user is explicitly specified?
Non-root user
Root user
Docker user
Admin user
2. Which of the following are considered best practices for securing Docker images?
Use official or verified base images
Scan images for vulnerabilities before deployment
Use multi-stage builds to reduce image size
Include all development tools for debugging
3. Running a Docker container with the --privileged flag enhances security by restricting container capabilities.
True
False
4. What command is used to scan Docker images for vulnerabilities using Docker's official tool (integrated with Docker Scout)?
5. What is a primary benefit of configuring a Docker container with a read-only filesystem?
Prevents malicious modification of the container's filesystem
Increases container startup speed by 50%
Automatically updates the container's software
Enables direct access to host files
6. Which of these are Docker security features that restrict container capabilities?
Seccomp
AppArmor
SELinux
Docker Swarm
7. Storing database passwords in a Docker image (e.g., via Dockerfile ENV) is a secure practice.
True
False
8. What Linux kernel feature is used by Docker to limit container resources like CPU, memory, and I/O?
9. Which Dockerfile directive explicitly sets the user context for the container to run as, reducing security risks?
RUN
USER
COPY
WORKDIR
10. To reduce the attack surface of Docker containers, which practices should be implemented?
Run containers with the least privilege (e.g., non-root users)
Minimize image layers by combining RUN commands
Remove unnecessary tools (e.g., curl, bash) from images
Enable all Linux capabilities with --cap-add=ALL
11. Docker Content Trust (DCT) ensures the integrity and authenticity of Docker images using digital signatures.
True
False
12. What is the recommended method to securely manage sensitive data (e.g., API keys) in Docker containers?
13. What risk is primarily mitigated by using a non-root user in Docker containers?
Privilege escalation from container to host
Increased image build time
Container network isolation failures
Inability to access host ports
14. Which practices enhance Docker daemon security?
Restrict daemon API access with TLS encryption
Run the Docker daemon as a non-root user
Use Docker authorization plugins to control access
Expose the daemon socket (e.g., /var/run/docker.sock) publicly
15. Using the 'latest' tag for Docker images in production is recommended to ensure access to the newest security patches.
True
False
Reset
Answered 0 of 0 — 0 correct