AJAX Interview Questions and Answers Test 1 PDF Download

Question: What is AJAX?

Answer:

AJAX stands for Asynchronous JavaScript and XML. AJAX is used for dynamically updating the portion of web page without refreshing the whole page. A JavaScript function is called to get the response from Application Server.

Question: What is a main function of AJAX?

Answer:

AJAX is mainly used to update parts of a loaded page, without reloading the complete page.

Question: Which object is used to retrieve data from a web server?

Answer:

XMLHttpRequest is an object used to retrieve data from a server.

Question: What is syntax for creating an XMLHttpRequest object?

Answer:

variable = new XMLHttpRequest();

Question: Which methods are used to send a request to a server?

Answer:

open() and send() methods are used to send a request to a web server.

Question: What is a code to implement GET request using AJAX?

Answer:

xhttp.open(“GET”, “file/script on server”, true); xhttp.send();

Question: What are advantages of asynchronous requests in AJAX?

Answer:

Asynchronous requests greatly improve web response for web developers.

Question: What is a code to implement POST request using AJAX?

Answer:

xhttp.open(“POST”, “file/script on serve”, true);xhttp.send();