Web Spiders Angular Developer Interview Questions, Process, and Tips

Promises are used for asynchronous operations that return a single value, while observables are used for asynchronous operations that return multiple values over time.

• Promises return a single value and are not cancellable.

• Observables return multiple values over time and can be cancelled.

• Promises are eager and start executing immediately upon creation.

• Observables are lazy and do not execute until subscribed to.

• Promises ...read more

Services are a way to share data and functionality across components in Angular.

• Services are singleton objects that can be injected into components.

• They provide a way to share data and functionality across components.

• They can be used to make HTTP requests, handle authentication, and more.

• Services can be generated using the Angular CLI.

• They are typically defined in a separate file and imported into components.

ng-content is a directive in Angular that allows for dynamic insertion of content.

• It is used to project content into a component from the outside.

• It is often used in combination with ng-template and ng-container.

• It can be used to create reusable components that can be customized with different content.

• It is useful for creating layouts and templates that can be reused across multiple components.

Dependency Injection is a design pattern used to inject dependencies into a class or component.

• DI is used to reduce coupling between components

• It allows for easier testing and maintenance

• Angular has its own DI system built-in

• Services and providers are commonly used with DI