Docker (beginner)plain Mode
Review all 15 questions for Docker (beginner).Plain Q&A (No XP)
#1Multiple Choice
When you set `--memory 256m` on a `docker run` command, which Linux kernel mechanism actually enforces the limit?
#2Multiple Choice
What happens to data stored in a container's writable layer when the container is deleted via `docker rm`?
#3Multiple Choice
Which namespace type isolates process IDs so a container cannot see processes running on the host?
#4Multiple Choice
Why should `COPY package*.json ./` precede `COPY . .` in a Node.js Dockerfile?
#5Multiple Choice
What host interface handles inbound traffic translation for port mapping (`docker run -p 8080:80`) in default bridge mode?
#6Multiple Choice
Which command detaches an interactive container session without stopping its execution?
#7Scenario
A developer complains that changes to local source code files are not appearing inside their running Node.js development container. They ran `docker run -d -p 3000:3000 my-node-app`. What storage mechanism is missing?
#8Scenario
Your web container crashes immediately after starting with exit code 0. Running `docker logs` shows: 'Nginx started in background'. Why did the container exit?
#9Scenario
You notice `docker build` uploads a 4.2 GB build context to the Docker daemon every time you run it, even though your project is only 20 MB. What file is missing from your project root?
#10Scenario
Two containers on the default bridge network try to ping each other by container name ('api-service' -> 'db-service'), but DNS resolution fails. How do you enable automatic container name resolution?
#11Code Fill
Complete the Docker CLI command to execute an interactive bash shell inside a running container named `prod-api`:
docker exec ___ prod-api bash#12Code Fill
Complete the Dockerfile instruction to set the working directory for all subsequent instructions to `/usr/src/app`:
___ /usr/src/app#13Code Fill
Complete the Compose key to ensure a service container automatically restarts unless explicitly stopped:
services:
web:
image: nginx
___: unless-stopped#14Open Ended
Explain the difference between the `CMD` and `ENTRYPOINT` instructions in a Dockerfile.
#15Open Ended