AJAX Multiple-Choice Questions (MCQs)

Ajax is a set of web development techniques that uses various web technologies (XML, HTML, CSS, and JavaScript) on the client-side to create asynchronous web applications. With Ajax, web applications can send and retrieve data from a server asynchronously without interfering with the display and behavior of the existing page.

Ajax MCQs: This section contains Ajax Multiple-Choice Questions with Answers. These Ajax MCQs are written for beginners as well as advanced, practice these MCQs to enhance and test the knowledge of Ajax.

List of Ajax MCQs

1. Ajax is used for creating _____.

Web applications
Desktop applications
System applications
Both A. and B.

Answer: A) Web applications

Explanation:

Ajax is used for creating better, faster, and more interactive web applications with the help of XML, HTML, CSS, and JavaScript.

2. Ajax stands for ______.

Asynchronous JavaScript and XML
Asynchronous JSON and XML
Asynchronous Java and XML
Asynchronous JavaScript and XMLHttpRequest

Answer: A) Asynchronous JavaScript and XML

Explanation:

AJAX stands for Asynchronous JavaScript and XML.

3. Which are the two major features of AJAX?

Make requests to the server without reloading the page
Receive and work with data from the server
Make requests to the server with reloading the page
Only receive the data from the server

Answer: A & B

Explanation:

The two major features of AJAX are:

Make requests to the server without reloading the page
Receive and work with data from the server

4. What server support Ajax?

WWW
SMTP
HTTP
All of the above

Answer: C) HTTP

Explanation:

HTTP server support Ajax.

5. Which of the following feature makes the Ajax unique?

It can work with all the databases
It is a server-side application can also be used to create servers
It can use Python & C++ for programming
It makes data requests asynchronously

Answer: D) It makes data requests asynchronously

Explanation:

Ajax makes data requests asynchronously – it’s a feature that makes the Ajax unique.

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6. Ajax sends data to a web server _____.

in the background
before loading the page
with reloading the page
All of the above

Answer: A) in the background

Explanation:

Ajax sends data to a web server in the background.

7. Ajax updates a web page ____ reloading the page.

with
without

Answer: B) without

Explanation:

Ajax updates a web page without reloading the page

8. How many types of triggers are present in update panel?

one
two
three
four

Answer: B) two

Explanation:

There are two types of triggers are present in update panel.

9. Which are the triggers present in update panel?

PostTrigger and AsyncPostTrigger
PostBackTrigger and SyncPostBackTrigger
SyncPostBackTrigger and AsyncPostBackTrigger
PostBackTrigger and AsyncPostBackTrigger

Answer: D) PostBackTrigger and AsyncPostBackTrigger

Explanation:

There are two types of triggers present in update panel, which are:

PostBackTrigger
AsyncPostBackTrigger

10. Why PostBackTrigger is used in update panel?

Specifies a control and event that will cause a full-page update
Specifies a control and event that will cause a partial page update
Specifies a control and event that will cause a full web application update
Specifies a control and event that will cause a full web application refresh

Answer: A) Specifies a control and event that will cause a full-page update

Explanation:

The PostBackTrigger trigger is used for specifying a control and event that will cause a full-page update.

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11. Why AsyncPostBackTrigger is used in update panel?

Specifies a control and event that will cause a full-page update
Specifies a control and event that will cause a partial page update
Specifies a control and event that will cause a full web application update
Specifies a control and event that will cause a full web application refresh

Answer: B) Specifies a control and event that will cause a partial page update

Explanation:

The AsyncPostBackTrigger trigger is used for specifying a control and event that will cause a partial page update.

12. Which formats are supported by Ajax to send and receive information?

JSON, XML, HTML, SQL, MySQL, and Text Files
JSON, XML, HTML, and Text Files
JSON, XML, HTML, NoSQL, and Oracle
JAVA, JSON, XML, HTML, Oracle, and Text Files

Answer: B) JSON, XML, HTML, and Text Files

Explanation:

Ajax can send and receive information in various formats, including JSON, XML, HTML, and text files.

13. Ajax technologies include ______.

HTML/XHTML and CSS
DOM
XML or JSON
XMLHttpRequest
JavaScript
All of the above

Answer: F) All of the above

Explanation:

Ajax technologies include the following technologies:

HTML/XHTML and CSS
DOM
XML or JSON
XMLHttpRequest
JavaScript

14. Which technologies give Ajax its name?

Net and XML
ASP and XML
Asynchronous JavaScript, CSS, ASP, and XML
Asynchronous JavaScript and XML

Answer: D) Asynchronous JavaScript and XML

Explanation:

The combination of Asynchronous JavaScript and XML give Ajax its name.

15. Which company made Ajax popular?

Oracle
Google
Microsoft
Facebook

Answer: B) Google

Explanation:

AJAX was made popular in 2005 by Google, with Google Suggest.

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16. Ajax is about updating ______, without reloading the full-page.

parts of a web page
parts of a database records
parts of a HTML tags dynamically
parts of a CSS classes dynamically

Answer: A) parts of a web page

Explanation:

Ajax is about updating parts of a web page, without reloading the full-page.

17. What are the advantages of Ajax?

Bandwidth utilization
More interactive
Speeder retrieval of data
All of the above

Answer: D) All of the above

Explanation:

The advantages of Ajax are:

Bandwidth utilization
More interactive
Speeder retrieval of data

18. What is update panel in Ajax?

a server control used to update the specified portion of a web page
server control used to update the full-page after reloading the page
a dashboard used to update the specified portion of a web page
None of the above

Answer: C) a dashboard used to update the specified portion of a web page

Explanation:

In the Ajax – Update panel is a server control used to update the specified portion of a web page.

19. Which object can be used to exchange data with a server behind the scenes?

XMLHttpRequest
HttpsRequest
JSONHttpRequest
All of the above

Answer: A) XMLHttpRequest

Explanation:

The XMLHttpRequest object can be used to exchange data with a server behind the scenes.

20. What is the correct syntax to create an XMLHttpRequest object?

XMLHttpRequest() variable
XMLHttpRequest() variable;
variable = new XMLHttpRequest()
variable = new XMLHttpRequest();

Answer: D) variable = new XMLHttpRequest();

Explanation:

The correct syntax to create an XMLHttpRequest object is:

variable = new XMLHttpRequest();

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21. Which method cancels the current request?

cancel()
abort()
stop()
pause()

Answer: B) abort()

Explanation:

The abort() method is used to cancel the current request.

22. Which method returns the header information?

getAllResponseHeaders()
getResponseHeaders()
getHeaderInformation()
getAllHeaderInformations()

Answer: A) getAllResponseHeaders()

Explanation:

The getAllResponseHeaders() method is used to get the header information.

23. Which method returns the specific header information?

getResponseHeader()
getSpecifcHeader()
getHeaderOnly()
getHeaderInfo()

Answer: A) getResponseHeader()

Explanation:

The getResponseHeader() method is used to get the specific header information.

24. Which method adds a label/value pair to the header to be sent?

getRequestHeader()
setAllRequestHeader()
setRequestHeader()
getAllRequestHeader()

Answer: C) setRequestHeader()

Explanation:

The setRequestHeader() method is used to add a label/value pair to the header to be sent.

25. Which property holds the status of the XMLHttpRequest?

readyState
holdState
pauseState
stopState

Answer: A) readyState

Explanation:

The readyState property is used to holds the status of the XMLHttpRequest.

26. Which property returns the response data as a string?

getText
getResponseText
responseText
responseAllText

Answer: C) responseText

Explanation:

The responseText property returns the response data as a string.

27. Which property returns the response data as XML data?

getXML
getResponseXML
responseXML
responseAllXML

Answer: C) responseXML

Explanation:

The responseXML property returns the response data as XML data.

28. Which property returns the status-number of a request?

statusText
statusXML
status-number
status

Answer: D) status

Explanation:

The status property returns the status-number of a request.

29. Which property returns the status-text?

statusText
statusXML
status-number
status

Answer: A) statusText

Explanation:

The statusText property returns the status-text.

30. “GET is simpler and faster than POST.” – Is this statement true?

Answer: A) Yes

Explanation:

Yes, the statement “GET is simpler and faster than POST.” is true.

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31. Which is the correct syntax to add HTTP headers to the request?

setRequestHeader(value, header)
setAllRequestHeader(value, header)
setRequestHeader(header, value)
setAllRequestHeader(header, value)

Answer: C) setRequestHeader(header, value)

Explanation:

The correct syntax to add HTTP headers to the request is,

setRequestHeader(header, value)

32. How to convert the below statement to the synchronous request?

xhttp.open("GET", "info.php", true);

Convert the third parameter to “false”
Convert the third parameter to “sync”
Convert the first parameter to “sync_GET”
All of the above

Answer: A) Convert the third parameter to “false”

Explanation:

To execute a synchronous request, you need to change the third parameter of the open() method to false.

33. Which are the two properties to hold the status of XMLHttpRequest?

status and statusText
statusNum and statusText
statusId and statusText
None of the above

Answer: A) status and statusText

Explanation:

The status and statusText properties are used to hold the status of the XMLHttpRequest object.

34. If the value of status property is 404, what does it mean?

OK
Forbidden
Method Not Allowed
Page not found

Answer: D) Page not found

Explanation:

Value 404 represents “Page not found”.

35. The ______ function is called every time the readyState changes.

getreadystatechange
onreadystatechange
onsetreadystatechange
toreadystatechange

Answer: B) onreadystatechange

Explanation:

The onreadystatechange function is called every time the readyState changes.

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