Angular Interview Practice Exam 2025 - Free Angular Practice Questions and Study Guide

The @Output decorator in Angular serves the purpose of emitting events from a child component to a parent component. This is crucial for establishing communication between components, particularly when the child component needs to notify the parent of certain actions or events, such as user interactions or data changes.

When a property in the child component is marked with the @Output decorator, it allows the child to create an EventEmitter instance. This instance is used to emit events, which the parent component can listen to. By subscribing to these events, the parent can respond appropriately, such as updating its state or triggering further actions based on the child's behavior.

This mechanism leverages Angular's binding capabilities to create a clear and structured way for components to communicate, thus promoting a well-organized architecture where components can interact without tightly coupling their implementations.