1. What is Image ? Junior A. ENTRYPOINT sets the fixed executable while CMD provides default arguments that can be overridden B. a service that stores and distributes Docker images such as Docker Hub C. Docker's modern build engine offering parallelism, build secrets, and cache mounts D. a read-only template containing the filesystem and metadata to run a container
2. Which term means: "a read-only template containing the filesystem and metadata to run a container"? Junior A. Bind mount B. Volume C. Image D. Dockerfile
3. Which statement is correct? Junior A. Image — a running, isolated instance of an image with its own process namespace B. Image — a cached, immutable filesystem change produced by each instruction in a Dockerfile C. Image — a read-only template containing the filesystem and metadata to run a container D. Image — a minimal base image containing only the app and runtime, no shell or package manager, reducing attack surface
4. What is Container ? Junior A. a minimal base image containing only the app and runtime, no shell or package manager, reducing attack surface B. a running, isolated instance of an image with its own process namespace C. a text file with instructions describing how to build a Docker image D. a cached, immutable filesystem change produced by each instruction in a Dockerfile
5. Which term means: "a running, isolated instance of an image with its own process namespace"? Junior A. Multi-stage build B. Distroless image C. Container D. ENTRYPOINT vs CMD
6. Which statement is correct? Junior A. Container — a running, isolated instance of an image with its own process namespace B. Container — a cached, immutable filesystem change produced by each instruction in a Dockerfile C. Container — a Dockerfile technique using multiple FROM stages to keep only build outputs in the final image D. Container — a service that stores and distributes Docker images such as Docker Hub
7. What is Dockerfile ? Junior A. a cached, immutable filesystem change produced by each instruction in a Dockerfile B. a text file with instructions describing how to build a Docker image C. a minimal base image containing only the app and runtime, no shell or package manager, reducing attack surface D. ENTRYPOINT sets the fixed executable while CMD provides default arguments that can be overridden
8. Which term means: "a text file with instructions describing how to build a Docker image"? Junior A. Dockerfile B. Registry C. Multi-stage build D. Image
9. Which statement is correct? Junior A. Dockerfile — a running, isolated instance of an image with its own process namespace B. Dockerfile — a text file with instructions describing how to build a Docker image C. Dockerfile — a minimal base image containing only the app and runtime, no shell or package manager, reducing attack surface D. Dockerfile — a read-only template containing the filesystem and metadata to run a container
10. What is Layer ? Junior A. a running, isolated instance of an image with its own process namespace B. Docker's modern build engine offering parallelism, build secrets, and cache mounts C. a read-only template containing the filesystem and metadata to run a container D. a cached, immutable filesystem change produced by each instruction in a Dockerfile
11. Which term means: "a cached, immutable filesystem change produced by each instruction in a Dockerfile"? Junior A. Image B. Layer C. Registry D. BuildKit
12. Which statement is correct? Junior A. Layer — reuse of unchanged layers from prior builds to speed up image creation B. Layer — a service that stores and distributes Docker images such as Docker Hub C. Layer — a cached, immutable filesystem change produced by each instruction in a Dockerfile D. Layer — a running, isolated instance of an image with its own process namespace
13. What is Registry ? Junior A. a text file with instructions describing how to build a Docker image B. a service that stores and distributes Docker images such as Docker Hub C. a Docker-managed persistent storage mechanism that outlives a container D. a Dockerfile technique using multiple FROM stages to keep only build outputs in the final image
14. Which term means: "a service that stores and distributes Docker images such as Docker Hub"? Junior A. Volume B. Registry C. Bind mount D. BuildKit
15. Which statement is correct? Junior A. Registry — a read-only template containing the filesystem and metadata to run a container B. Registry — Docker's modern build engine offering parallelism, build secrets, and cache mounts C. Registry — a service that stores and distributes Docker images such as Docker Hub D. Registry — a cached, immutable filesystem change produced by each instruction in a Dockerfile
16. What is Volume ? Junior A. a service that stores and distributes Docker images such as Docker Hub B. mounting a host directory into a container so changes are shared with the host C. a cached, immutable filesystem change produced by each instruction in a Dockerfile D. a Docker-managed persistent storage mechanism that outlives a container
17. Which term means: "a Docker-managed persistent storage mechanism that outlives a container"? Junior A. ENTRYPOINT vs CMD B. Layer C. Dockerfile D. Volume
18. Which statement is correct? Junior A. Volume — Docker's modern build engine offering parallelism, build secrets, and cache mounts B. Volume — a Docker-managed persistent storage mechanism that outlives a container C. Volume — a read-only template containing the filesystem and metadata to run a container D. Volume — mounting a host directory into a container so changes are shared with the host
19. What is Multi-stage build ? Mid A. a minimal base image containing only the app and runtime, no shell or package manager, reducing attack surface B. Docker's modern build engine offering parallelism, build secrets, and cache mounts C. reuse of unchanged layers from prior builds to speed up image creation D. a Dockerfile technique using multiple FROM stages to keep only build outputs in the final image
20. Which term means: "a Dockerfile technique using multiple FROM stages to keep only build outputs in the final image"? Mid A. Multi-stage build B. Bind mount C. Registry D. Dockerfile
21. Which statement is correct? Mid A. Multi-stage build — a Dockerfile technique using multiple FROM stages to keep only build outputs in the final image B. Multi-stage build — a Docker-managed persistent storage mechanism that outlives a container C. Multi-stage build — a minimal base image containing only the app and runtime, no shell or package manager, reducing attack surface D. Multi-stage build — a service that stores and distributes Docker images such as Docker Hub
22. What is Bind mount ? Mid A. reuse of unchanged layers from prior builds to speed up image creation B. mounting a host directory into a container so changes are shared with the host C. a Docker-managed persistent storage mechanism that outlives a container D. a Dockerfile technique using multiple FROM stages to keep only build outputs in the final image
23. Which term means: "mounting a host directory into a container so changes are shared with the host"? Mid A. Build cache B. Distroless image C. Bind mount D. Registry
24. Which statement is correct? Mid A. Bind mount — a running, isolated instance of an image with its own process namespace B. Bind mount — mounting a host directory into a container so changes are shared with the host C. Bind mount — reuse of unchanged layers from prior builds to speed up image creation D. Bind mount — a Dockerfile technique using multiple FROM stages to keep only build outputs in the final image
25. What is ENTRYPOINT vs CMD ? Mid A. a minimal base image containing only the app and runtime, no shell or package manager, reducing attack surface B. ENTRYPOINT sets the fixed executable while CMD provides default arguments that can be overridden C. mounting a host directory into a container so changes are shared with the host D. Docker's modern build engine offering parallelism, build secrets, and cache mounts
26. Which term means: "ENTRYPOINT sets the fixed executable while CMD provides default arguments that can be overridden"? Mid A. Volume B. Layer C. Distroless image D. ENTRYPOINT vs CMD
27. Which statement is correct? Mid A. ENTRYPOINT vs CMD — a cached, immutable filesystem change produced by each instruction in a Dockerfile B. ENTRYPOINT vs CMD — a read-only template containing the filesystem and metadata to run a container C. ENTRYPOINT vs CMD — ENTRYPOINT sets the fixed executable while CMD provides default arguments that can be overridden D. ENTRYPOINT vs CMD — a Dockerfile technique using multiple FROM stages to keep only build outputs in the final image
28. What is Build cache ? Mid A. a running, isolated instance of an image with its own process namespace B. a service that stores and distributes Docker images such as Docker Hub C. a read-only template containing the filesystem and metadata to run a container D. reuse of unchanged layers from prior builds to speed up image creation
29. Which term means: "reuse of unchanged layers from prior builds to speed up image creation"? Mid A. Container B. Distroless image C. Build cache D. Volume
30. Which statement is correct? Mid A. Build cache — Docker's modern build engine offering parallelism, build secrets, and cache mounts B. Build cache — a Docker-managed persistent storage mechanism that outlives a container C. Build cache — a service that stores and distributes Docker images such as Docker Hub D. Build cache — reuse of unchanged layers from prior builds to speed up image creation Showing 30 of 66 Containers · Docker questions — the full set, with answers, explanations and an AI tutor on every question, is inside.