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Container Study Cards


Master Container with our interactive study cards designed for effective learning. These flashcards use proven spaced repetition techniques to help you memorize key concepts, definitions, and facts. Perfect for students, professionals, and lifelong learners seeking to improve knowledge retention and ace exams through active recall practice.


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What is a container?

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Answer:

A lightweight portable package that includes an application and all its dependencies

What is Docker?

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Answer:

A platform for developing shipping and running applications using containerization technology

What is the difference between a container and a virtual machine?

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Answer:

Containers share the host OS kernel while VMs include a full operating system

What is a Docker image?

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A read-only template used to create containers

What is a Dockerfile?

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A text file containing instructions to build a Docker image

What is Docker Hub?

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A cloud-based registry service for sharing Docker images

What is container orchestration?

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Answer:

The automated management of containerized applications including deployment scaling and networking

What is Kubernetes?

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Answer:

An open-source container orchestration platform for managing containerized applications

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What is a Kubernetes pod?

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The smallest deployable unit in Kubernetes that can contain one or more containers

What is a Kubernetes node?

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A worker machine in a Kubernetes cluster that runs pods

What is a Kubernetes cluster?

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A set of nodes that run containerized applications managed by Kubernetes

What is a container registry?

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A repository for storing and distributing container images

What is container networking?

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The technology that enables containers to communicate with each other and external systems

What is a microservice?

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An architectural approach where applications are built as small independent services

What is container isolation?

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The separation of containers from each other and the host system for security and stability

What is a base image?

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The starting point image used to build other Docker images

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What are container layers?

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Read-only filesystem layers that make up a Docker image

What is container runtime?

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The software responsible for running containers such as Docker Engine or containerd

What is a Kubernetes deployment?

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A resource that manages the creation and scaling of replica pods

What is a Kubernetes service?

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An abstraction that defines how to access a set of pods

What is container health checking?

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A mechanism to monitor if a container is running properly

What is Docker Compose?

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Answer:

A tool for defining and running multi-container Docker applications

What is a sidecar container?

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A secondary container that runs alongside the main container in a pod

What is container port mapping?

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The process of exposing container ports to the host system

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What is a persistent volume in Kubernetes?

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Answer:

Storage that persists beyond the lifecycle of individual pods

What is horizontal pod autoscaling?

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Automatically scaling the number of pods based on resource utilization

What is a Kubernetes ingress?

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A resource that manages external access to services in a cluster

What is container security scanning?

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The process of analyzing container images for vulnerabilities

What is a multi-stage Docker build?

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Answer:

A build process that uses multiple FROM statements to create optimized images

What is the difference between CMD and ENTRYPOINT in Docker?

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Answer:

CMD provides default arguments while ENTRYPOINT defines the main command that always runs

Remember: Use all available resources to study. Flearn alone cannot guarantee success in any exams—make sure to supplement your learning!