27 Containers · Docker questions from the MLOps & Integration bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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A.a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
B.a bind mount maps a host path into the container; a volume is Docker-managed storage that survives container removal
C.a runnable instance of an image with its own writable layer, network and process space
D.a service such as Docker Hub or ECR that stores and distributes container images
Answer + AI explanation with Pro
2. Which term means: "a read-only template of layers bundling an app and its dependencies, built from a Dockerfile"?
Junior
A.Multi-stage build
B.Image
C.Layer caching
D.OCI image spec
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3. Which statement is correct?
Junior
A.Image — reuse of unchanged image layers across builds so only changed instructions rebuild
B.Image — a runnable instance of an image with its own writable layer, network and process space
C.Image — a bind mount maps a host path into the container; a volume is Docker-managed storage that survives container removal
D.Image — a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
Answer + AI explanation with Pro
4. What is Container?
Junior
A.a minimal base image with no shell or package manager, shrinking attack surface for production
B.reuse of unchanged image layers across builds so only changed instructions rebuild
C.a runnable instance of an image with its own writable layer, network and process space
D.a service such as Docker Hub or ECR that stores and distributes container images
Answer + AI explanation with Pro
5. Which term means: "a runnable instance of an image with its own writable layer, network and process space"?
Junior
A.Container
B.Layer caching
C.Image
D.Multi-stage build
Answer + AI explanation with Pro
6. Which statement is correct?
Junior
A.Container — reuse of unchanged image layers across builds so only changed instructions rebuild
B.Container — a service such as Docker Hub or ECR that stores and distributes container images
C.Container — a runnable instance of an image with its own writable layer, network and process space
D.Container — a Dockerfile pattern using multiple FROM stages to keep build tools out of the final slim image
Answer + AI explanation with Pro
7. What is Dockerfile?
Junior
A.a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
B.a minimal base image with no shell or package manager, shrinking attack surface for production
C.the Open Container Initiative standard format that lets images run across Docker, containerd and CRI-O
D.a text file of instructions (FROM, RUN, COPY, CMD) that defines how an image is built
Answer + AI explanation with Pro
8. Which term means: "a text file of instructions (FROM, RUN, COPY, CMD) that defines how an image is built"?
Junior
A.Multi-stage build
B.Image
C.Distroless image
D.Dockerfile
Answer + AI explanation with Pro
9. Which statement is correct?
Junior
A.Dockerfile — a minimal base image with no shell or package manager, shrinking attack surface for production
B.Dockerfile — a text file of instructions (FROM, RUN, COPY, CMD) that defines how an image is built
C.Dockerfile — a runnable instance of an image with its own writable layer, network and process space
D.Dockerfile — a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
Answer + AI explanation with Pro
10. What is Registry?
Junior
A.a service such as Docker Hub or ECR that stores and distributes container images
B.a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
C.the Open Container Initiative standard format that lets images run across Docker, containerd and CRI-O
D.a minimal base image with no shell or package manager, shrinking attack surface for production
Answer + AI explanation with Pro
11. Which term means: "a service such as Docker Hub or ECR that stores and distributes container images"?
Junior
A.Multi-stage build
B.Registry
C.Container
D.Distroless image
Answer + AI explanation with Pro
12. Which statement is correct?
Junior
A.Registry — a runnable instance of an image with its own writable layer, network and process space
B.Registry — a service such as Docker Hub or ECR that stores and distributes container images
C.Registry — reuse of unchanged image layers across builds so only changed instructions rebuild
D.Registry — a text file of instructions (FROM, RUN, COPY, CMD) that defines how an image is built
Answer + AI explanation with Pro
13. What is Layer caching?
Mid
A.a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
B.a text file of instructions (FROM, RUN, COPY, CMD) that defines how an image is built
C.a minimal base image with no shell or package manager, shrinking attack surface for production
D.reuse of unchanged image layers across builds so only changed instructions rebuild
Answer + AI explanation with Pro
14. Which term means: "reuse of unchanged image layers across builds so only changed instructions rebuild"?
Mid
A.OCI image spec
B.Layer caching
C.Image
D.Registry
Answer + AI explanation with Pro
15. Which statement is correct?
Mid
A.Layer caching — the Open Container Initiative standard format that lets images run across Docker, containerd and CRI-O
B.Layer caching — a bind mount maps a host path into the container; a volume is Docker-managed storage that survives container removal
C.Layer caching — reuse of unchanged image layers across builds so only changed instructions rebuild
D.Layer caching — a minimal base image with no shell or package manager, shrinking attack surface for production
Answer + AI explanation with Pro
16. What is Multi-stage build?
Mid
A.a text file of instructions (FROM, RUN, COPY, CMD) that defines how an image is built
B.the Open Container Initiative standard format that lets images run across Docker, containerd and CRI-O
C.a bind mount maps a host path into the container; a volume is Docker-managed storage that survives container removal
D.a Dockerfile pattern using multiple FROM stages to keep build tools out of the final slim image
Answer + AI explanation with Pro
17. Which term means: "a Dockerfile pattern using multiple FROM stages to keep build tools out of the final slim image"?
Mid
A.Multi-stage build
B.OCI image spec
C.Container
D.Registry
Answer + AI explanation with Pro
18. Which statement is correct?
Mid
A.Multi-stage build — a text file of instructions (FROM, RUN, COPY, CMD) that defines how an image is built
B.Multi-stage build — a bind mount maps a host path into the container; a volume is Docker-managed storage that survives container removal
C.Multi-stage build — a runnable instance of an image with its own writable layer, network and process space
D.Multi-stage build — a Dockerfile pattern using multiple FROM stages to keep build tools out of the final slim image
Answer + AI explanation with Pro
19. What is Bind mount vs volume?
Mid
A.reuse of unchanged image layers across builds so only changed instructions rebuild
B.a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
C.a minimal base image with no shell or package manager, shrinking attack surface for production
D.a bind mount maps a host path into the container; a volume is Docker-managed storage that survives container removal
Answer + AI explanation with Pro
20. Which term means: "a bind mount maps a host path into the container; a volume is Docker-managed storage that survives container removal"?
Mid
A.Registry
B.Dockerfile
C.Bind mount vs volume
D.Layer caching
Answer + AI explanation with Pro
21. Which statement is correct?
Mid
A.Bind mount vs volume — a bind mount maps a host path into the container; a volume is Docker-managed storage that survives container removal
B.Bind mount vs volume — a text file of instructions (FROM, RUN, COPY, CMD) that defines how an image is built
C.Bind mount vs volume — the Open Container Initiative standard format that lets images run across Docker, containerd and CRI-O
D.Bind mount vs volume — a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
Answer + AI explanation with Pro
22. What is Distroless image?
Senior
A.a service such as Docker Hub or ECR that stores and distributes container images
B.a runnable instance of an image with its own writable layer, network and process space
C.a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
D.a minimal base image with no shell or package manager, shrinking attack surface for production
Answer + AI explanation with Pro
23. Which term means: "a minimal base image with no shell or package manager, shrinking attack surface for production"?
Senior
A.Layer caching
B.Distroless image
C.Image
D.Container
Answer + AI explanation with Pro
24. Which statement is correct?
Senior
A.Distroless image — reuse of unchanged image layers across builds so only changed instructions rebuild
B.Distroless image — a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
C.Distroless image — a minimal base image with no shell or package manager, shrinking attack surface for production
D.Distroless image — a Dockerfile pattern using multiple FROM stages to keep build tools out of the final slim image
Answer + AI explanation with Pro
25. What is OCI image spec?
Mid
A.a text file of instructions (FROM, RUN, COPY, CMD) that defines how an image is built
B.a read-only template of layers bundling an app and its dependencies, built from a Dockerfile
C.the Open Container Initiative standard format that lets images run across Docker, containerd and CRI-O
D.a Dockerfile pattern using multiple FROM stages to keep build tools out of the final slim image
Answer + AI explanation with Pro
26. Which term means: "the Open Container Initiative standard format that lets images run across Docker, containerd and CRI-O"?
Mid
A.Distroless image
B.Image
C.OCI image spec
D.Container
Answer + AI explanation with Pro
27. Which statement is correct?
Mid
A.OCI image spec — a minimal base image with no shell or package manager, shrinking attack surface for production
B.OCI image spec — a Dockerfile pattern using multiple FROM stages to keep build tools out of the final slim image
C.OCI image spec — the Open Container Initiative standard format that lets images run across Docker, containerd and CRI-O
D.OCI image spec — reuse of unchanged image layers across builds so only changed instructions rebuild
Answer + AI explanation with Pro
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