Angular Interview Practice

What are lifecycle hooks in Angular?

1. Methods that manage routing

2. Special methods allowing access to execution cycles

3. Tools for HTTP request management

4. Services that enhance application performance

The correct answer is: Special methods allowing access to execution cycles

Lifecycle hooks in Angular are special methods that allow developers to tap into key moments in the lifecycle of a component or directive. These hooks provide opportunities for custom logic to be executed at specific times, such as when the component is being initialized, when it is being checked for changes, or when it is about to be destroyed. For instance, the ngOnInit lifecycle hook is called shortly after the constructor and is typically where initialization logic occurs. Similarly, ngOnChanges can be used to respond to changes in input properties, and ngOnDestroy is useful for cleaning up resources before the component is removed from the DOM. Utilizing these hooks properly can greatly enhance application performance and maintainability, enabling developers to ensure that components behave as expected throughout their lifecycle. The other options do not accurately reflect the purpose of lifecycle hooks; while methods that manage routing, tools for HTTP requests, or services that enhance performance are all important aspects of Angular development, they do not relate to the specific functionality provided by lifecycle hooks.