This video tutorial covers two key aspects of Angular 2: the HTTP module and observables. It explains how to use the HTTP module to make GET and POST requests to external APIs, specifically using the JSONPlaceholder API. The tutorial also introduces observables for handling asynchronous data streams and demonstrates how to implement them in an Angular application. Additionally, it shows how to use the map operator to process JSON data and how to style the application using Bootstrap.

What are the two main aspects of Angular 2 discussed in the video?

• Routing and forms

• Services and modules

• Directives and components

• HTTP module and observables

What is the purpose of the HTTP module in Angular?

• To create animations

• To make HTTP requests to APIs

• To handle user input

• To manage application state

What additional field is added to the post interface from the API?

• User ID

• Timestamp

• Category

• Status

What operator is used with observables to transform the response?

• Reduce

• Filter

• Map

• Concat

How do you limit the number of posts fetched from the API?

• By filtering the response in the component

• By modifying the API endpoint

• By using a query parameter in the URL

• By setting a limit in the HTTP headers

What is required to make a POST request in Angular?

• Setting the request method to GET

• Using a different API endpoint

• Including headers for content type

• Adding a query parameter

What happens to the data after a POST request to the public API?

• It is permanently saved

• It is temporarily updated until refresh

• It is deleted immediately

• It is stored in local storage

Which CSS framework is used to enhance the UI?

• Bootstrap

• Tailwind CSS

• Materialize

• Foundation

What class is added to the form input to style it?

• input-control

• form-input

• input-style

• form-control

What is the purpose of using observables in Angular?

• To manage component lifecycle

• To create static data

• To deal with asynchronous data streams

• To handle synchronous data