Ethical Hacking Essentials Practice Test

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Which of the following components in Docker architecture refers to locations where images are stored and pulled whenever required?

Docker Engine
Docker Image
Docker Registries
Docker Compose

The correct answer is: Docker Registries

The component in Docker architecture that refers to locations where images are stored and pulled whenever required is Docker Registries. Docker Registries function as repositories for Docker images, allowing developers to save, distribute, and obtain images seamlessly. When an application is being deployed or when a container is started, the Docker engine can pull the necessary images from the registry to ensure that the correct version of the application is utilized. Docker Engine is the core service that runs and manages containers, but it does not store images itself. Docker Image represents a lightweight, standalone, executable software package that includes everything needed to run a piece of software, but images must be stored in a registry. Docker Compose is a tool used for defining and running multi-container Docker applications and does not pertain to the storage or retrieval of images. Therefore, the correct answer highlights the role of Docker Registries in managing Docker images efficiently.