Angular Interview Practice

Dependency injection is a design pattern used in Angular to allow components and services to receive their dependencies from an external source rather than creating them internally. This approach increases the flexibility and modularity of code, making it easier to manage and test.

When a component or a service needs an instance of a class (such as another service or a set of configuration data), dependency injection provides that instance automatically, which helps in decoupling the classes and assists in maintaining clean code architecture. This process also allows for more efficient reuse of services throughout the application and promotes better testability by enabling mock services to be injected during testing without changing the component or service code itself.

The other options, while related to different aspects of Angular functionality, do not capture the essence of dependency injection. Linking components with templates pertains to how Angular binds views and models. Enabling communication with remote APIs is about using services to handle HTTP requests, while managing user input in forms focuses on Angular's reactive and template-driven forms capabilities. These functions are critical to Angular applications, but they do not pertain to the core purpose of dependency injection.