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

Docker containers bundle the application code with all its runtime dependencies, eliminating 'works on my machine' problems by running identically in dev, staging, and 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

A Docker image is an immutable snapshot of the filesystem and configuration, while a container is a live, running process created from that image.

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

docker-compose up reads the docker-compose.yml file and starts all defined services (e.g., app + database + cache) together with their configured networking and volumes.

Question 4

What is Kubernetes primarily used for?

Accepted Answer

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

Answer

Kubernetes automates deployment, scaling, load balancing, and self-healing of containerized workloads across multiple nodes in a cluster.

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

.dockerignore works like .gitignore, preventing files like node_modules or .env from being included in the build context sent to the Docker daemon, keeping images smaller and more secure.

Full-Stack Development Practice Test

Full-Stack Development Practice Test

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