What components are part of Spring Core and what are their roles?

Spring Core is the fundamental module of the Spring Framework that provides essential capabilities for building applications.

Main components of Spring Core:

• BeanFactory — the basic container for managing the lifecycle and configuration of objects (beans).
• ApplicationContext — an extension of BeanFactory with additional features such as event support, internationalization, and resource loading.
• Dependency Injection (DI) — a mechanism for injecting dependencies, allowing automatic wiring of components.
• Resource Loader — an abstraction for loading resources (files, classes, etc.).
• Event Propagation — an event system for component interaction.

The role of these components is to simplify the creation, configuration, and management of application objects, as well as to enhance modularity and testability of the code.