Cairo University Faculty of Engineering Computer Engineering Department WEB BUILDING CMPN 425-Fall 2022 1 2 PHP Advanced-cont AJAX 4

What is AJAX?

A technique for creating fast and dynamic web pages (correct)
A type of web server
A programming language for building dynamic web pages
A method for storing data on the client-side

Which object is used to create an XMLHttpRequest in modern browsers?

AJAXRequest
XMLHttpRequestObject
XMLHTTP (correct)
ActiveXObject

What method is used to send a request to a server using XMLHttpRequest?

submitRequest()
send() (correct)
getServerResponse()
sendRequest()

What does the responseText property of XMLHttpRequest contain?

The server's response as a string (A) Signup and view all the answers

Which applications use AJAX according to the given text?

Google Search, Google Maps, Gmail (D) Signup and view all the answers

What happens if a classic web page (not using AJAX) needs to change its content?

The whole page is reloaded (B) Signup and view all the answers

What triggers the onreadystatechange event handler?

Every time the readyState property changes (C) Signup and view all the answers

When is the response considered ready?

When readyState is 4 and status is 200 (D) Signup and view all the answers

What happens if the input field in the AJAX and PHP Example is empty?

The content of txtHint is cleared and the function exits (B) Signup and view all the answers

What does the xmlhttp.send() method do?

Sends the request off to a file on the server (D) Signup and view all the answers

What happens when str.length == 0 in the showHint() function?

The content of txtHint is cleared and the function exits (A) Signup and view all the answers

What parameter is added to the URL in the showHint() function?

(q) (B) Signup and view all the answers

How many times is onreadystatechange triggered?

Four times, once for each change in readyState (A) Signup and view all the answers

`xmlhttp.onreadystatechange` is designed to be a function that will be called:

Every time the readyState property changes in XMLHttpRequest (C) Signup and view all the answers

`showHint()` function executes what operations when the input field is not empty?

<code>Create an XMLHttpRequest object</code>, <code>Create a function to be executed when the server response is ready</code>, <code>Send the request off to a file on the server</code> (D) Signup and view all the answers

What does 'this.readyState == 4 && this.status == 200' represent?

Condition for checking if response is ready (C) Signup and view all the answers

What is the purpose of AJAX in web development?

To update parts of a web page without reloading the whole page (B) Signup and view all the answers

Which object is used to create an XMLHttpRequest in modern browsers?

XMLHttpRequest object (A) Signup and view all the answers

What does the 'xmlhttp.onreadystatechange' event handler represent?

The function that will be called when readyState changes (B) Signup and view all the answers

What happens if the input field in the AJAX and PHP Example is empty?

No request is sent to the server (D) Signup and view all the answers

What is the responseText property of XMLHttpRequest used for?

To store the response from the server as a text string (C) Signup and view all the answers

When should old versions of Internet Explorer (IE5 and IE6) use an ActiveX Object to create an XMLHttpRequest?

Old versions of Internet Explorer should never use an ActiveX Object (B) Signup and view all the answers

What is the purpose of the onreadystatechange event handler in the context of XMLHttpRequest?

To define a function that is called when the readyState property changes (C) Signup and view all the answers

What does 'this.readyState == 4 && this.status == 200' represent in the context of XMLHttpRequest?

A check for successful server response readiness (C) Signup and view all the answers

What happens when str.length == 0 in the showHint() function?

The content of the txtHint placeholder is cleared (B) Signup and view all the answers

In the context of AJAX and PHP Example, what does the showHint() function do when the input field is not empty?

Adds a parameter to the URL and sends a request to a file on the server (A) Signup and view all the answers

What triggers the onreadystatechange event handler in the context of XMLHttpRequest?

Changes in readyState property of the XMLHttpRequest (D) Signup and view all the answers

What does the xmlhttp.send() method do in the context of XMLHttpRequest?

Sends a request to the server (C) Signup and view all the answers

What are three important properties of the XMLHttpRequest object that determine if the response is ready?

'readyState', 'status', 'responseText' (D) Signup and view all the answers

When is the response considered ready in the context of XMLHttpRequest?

When readyState is 4 and status is 200 (B) Signup and view all the answers

What happens if a classic web page (not using AJAX) needs to change its content?

It reloads the entire page to change its content (B) Signup and view all the answers

Cairo University Faculty of Engineering Computer Engineering Department WEB BUILDING CMPN 425-Fall 2022 1 2 PHP Advanced-cont AJAX 4

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Questions and Answers

What is AJAX?

Which object is used to create an XMLHttpRequest in modern browsers?

What method is used to send a request to a server using XMLHttpRequest?

What does the responseText property of XMLHttpRequest contain?

Which applications use AJAX according to the given text?

What happens if a classic web page (not using AJAX) needs to change its content?

What triggers the onreadystatechange event handler?

When is the response considered ready?

What happens if the input field in the AJAX and PHP Example is empty?

What does the xmlhttp.send() method do?

What happens when str.length == 0 in the showHint() function?

What parameter is added to the URL in the showHint() function?

How many times is onreadystatechange triggered?

xmlhttp.onreadystatechange is designed to be a function that will be called:

showHint() function executes what operations when the input field is not empty?

What does 'this.readyState == 4 && this.status == 200' represent?

What is the purpose of AJAX in web development?

Which object is used to create an XMLHttpRequest in modern browsers?

What does the 'xmlhttp.onreadystatechange' event handler represent?

What happens if the input field in the AJAX and PHP Example is empty?

What is the responseText property of XMLHttpRequest used for?

When should old versions of Internet Explorer (IE5 and IE6) use an ActiveX Object to create an XMLHttpRequest?

What is the purpose of the onreadystatechange event handler in the context of XMLHttpRequest?

What does 'this.readyState == 4 && this.status == 200' represent in the context of XMLHttpRequest?

What happens when str.length == 0 in the showHint() function?

In the context of AJAX and PHP Example, what does the showHint() function do when the input field is not empty?

What triggers the onreadystatechange event handler in the context of XMLHttpRequest?

What does the xmlhttp.send() method do in the context of XMLHttpRequest?

What are three important properties of the XMLHttpRequest object that determine if the response is ready?

When is the response considered ready in the context of XMLHttpRequest?

What happens if a classic web page (not using AJAX) needs to change its content?

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`xmlhttp.onreadystatechange` is designed to be a function that will be called:

`showHint()` function executes what operations when the input field is not empty?