Introducing Ionic 2 (Video 11)

This video tutorial covers making API calls in Angular using the built-in HTTP service. It introduces dependency injection, setting up HTTP providers, and making GET requests. The tutorial also explains handling responses with observables, highlighting the differences from Angular 1. The video demonstrates how to inject services and make API calls, providing a proxy for iTunes API to bypass cross-origin restrictions.

What is the primary purpose of using services in Angular when dealing with APIs?

• To avoid using any external libraries

• To enhance code reusability and manage API calls

• To make the application run offline

• To hardcode data into the application

In Angular 2, what must be done to use the HTTP service?

• It can only be used in Angular 1

• It is available by default without any configuration

• It must be imported and specified as a provider

• It requires a separate installation package

How does Angular 2 handle asynchronous processes differently from Angular 1?

• By using callbacks instead of promises

• By using synchronous functions

• By using observables instead of promises

• By using promises instead of callbacks

What is the benefit of using arrow functions in ES6?

• They provide a shorter syntax and maintain the 'this' scope

• They are longer and more complex

• They are only used for synchronous code

• They change the scope of 'this'

Why is a proxy API used instead of calling the iTunes API directly?

• To handle cross-origin restrictions

• To increase the speed of API calls

• To reduce the cost of API usage

• To avoid using Angular's HTTP service