Angular Core

 What are hooks in angular?

• When a new component is created in angular, it goes through many phases, each phase has a call back attached to it.
• The callbacks are called in Following order
• Constructor
• ngOnChanges()
• ngOnInit()
• ngOnDoCheck()
• ngAfterContentInit()

What is a service in angular?

• A Service is used by multiple components
• It helps to avoid duplication of code, thus avoiding DRY principle(Do not repeat yourself).
• Separate component Presentation, logic from business logic.

Angular Modules

Q Difference between Browser Module and platformBrowserDynamicModule?

1. A platformBrowserDynamic is a function used to bootstrap an Angular Application.
2. CommonModule is a module that provides all kinds of services and directives one usually wants to use in an Angular 2 application like ngIf
1. Common module is platform-independent
3. Browser Module exports CommonModule and provides a few services specific to the Browser platform.
1. Browser Module should only be imported in App Module.
2. Common Module can be imported Anywhere.