Ajax & XHR Introduction

The video tutorial introduces Ajax, a set of web technologies for asynchronous data exchange between client and server, highlighting its components like XHR and JSON. It explains how Ajax enhances web interactivity by allowing partial page updates without reloading. The tutorial covers working with local and public APIs, including authentication and CORS. It also discusses core technologies like XHR and Fetch API, and external libraries such as Axios and jQuery for making HTTP requests.

What does Ajax stand for?

• Advanced Java and XML

• Asynchronous Java and XML

• Advanced JavaScript and XML

• Asynchronous JavaScript and XML

Which data format has largely replaced XML in Ajax?

• YAML

• JSON

• CSV

• HTML

What is the primary benefit of using Ajax for web requests?

• It requires reloading the entire web page.

• It allows for synchronous data loading.

• It enables asynchronous data exchange without page reloads.

• It only works with XML data.

What is CORS used for in web development?

• To manage user sessions

• To enable cross-domain communication

• To secure local servers

• To encrypt data

Which authentication method is mentioned as popular for APIs?

• OAuth

• JWT

• Basic Auth

• API Key

Which JavaScript feature is recommended for making HTTP requests?

• Node HTTP

• jQuery

• Fetch API

• Axios

Why is jQuery not recommended for Ajax requests?

• It does not support JSON.

• It is too lightweight.

• It is a complete DOM manipulation library, making it bloated for just Ajax.

• It is not compatible with modern browsers.