Full-Stack Development Full-Stack Development DevOps, CI/CD & Cloud Deployment

Question 1

What is the primary purpose of Docker in a full-stack development workflow?

Accepted Answer

To package an application and its dependencies into portable containers that run consistently across environments

Answer

To manage DNS records for deployed applications

Answer

To compile TypeScript into JavaScript

Answer

To monitor application performance in production

Question 2

What is the difference between a Docker image and a Docker container?

Accepted Answer

An image is a static blueprint; a container is a running instance of that image

Answer

Images run in the cloud; containers run locally

Answer

Images store data; containers store code

Answer

Images are for Linux; containers are for Windows

Question 3

What does `docker-compose up` do?

Accepted Answer

Starts all services defined in a docker-compose.yml file as a multi-container application

Answer

Uploads images to Docker Hub

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Updates Docker to the latest version

Answer

Scales a single container to multiple replicas

Question 4

What is Kubernetes primarily used for?

Accepted Answer

Orchestrating, scaling, and managing containerized applications across a cluster of machines

Answer

Building Docker images from Dockerfiles

Answer

Monitoring application logs and metrics

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Providing a container image registry

Question 5

What is the purpose of a `.dockerignore` file?

Accepted Answer

To exclude files and directories from being copied into the Docker image during the build

Answer

To specify which containers Docker should not start

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To ignore Docker version warnings

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To block certain Docker commands from running

Question 6

In a Dockerfile, what does the `EXPOSE` instruction do?

Accepted Answer

Documents which port the containerized application listens on, used as metadata for networking configuration

Answer

Opens a port on the host machine

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Automatically publishes the container port to the host

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Encrypts network traffic on the specified port