Rigorous Ajax Test - 44+ MCQs: Ajax Quiz: Test Your Expertise with Asynchronous JavaScript and XML

1. What is the purpose of the XMLHttpRequest readyState property?

To specify the HTTP method for the request

To determine the current state of the request

To define the response type

To set request headers

2. Which method is used to set custom headers in an Ajax request?

setHeaders()

addHeaders()

customHeaders()

setRequestHeader()

3. Which property is used to access the status code of an Ajax response?

statusCode

responseStatus

status

HTTPStatus

4. Which status code indicates a successful Ajax request?

200 OK

404 Not Found

500 Internal Server Error

302 Found

5. Which event is triggered when an Ajax request completes successfully?

onError

onAbort

onReadyStateChange

onSuccess

6. Which HTTP method is commonly used in Ajax for updating data on the server?

GET

POST

PUT

DELETE

7. What is the purpose of the 'crossOrigin' property in the 'Image' object in Ajax?

To handle errors during the request

To define the response type

To facilitate cross-origin requests for images

To track the progress of the data transfer

8. What is the purpose of the XMLHttpRequest property 'responseType' in Ajax?

To define the request method

To set the content type of the request

To specify the type of data expected in the response

To indicate whether the request should be asynchronous or not

9. Which method is used to cancel an ongoing Ajax request?

abort()

cancel()

stop()

terminate()

10. Which method is used to perform parallel Ajax requests?

executeParallel()

sendAsync()

performRequest()

Promise.all()

11. What is the purpose of the same-origin policy in Ajax?

To restrict requests to a different domain for security reasons

To enable cross-origin resource sharing

To validate the content type of Ajax responses

To prevent caching of Ajax requests

12. Which JavaScript function is commonly used to handle errors in Ajax?

errorHandler()

handleError()

onError()

catchError()

13. Which JavaScript function is commonly used to parse JSON data received in an Ajax response?

parseXML()

decodeJSON()

evalJSON()

JSON.parse()

14. What is the main advantage of using Ajax in web development?

Improved server performance

Reduced client-side scripting

Synchronous data transfer

Dynamic and responsive user interfaces

15. What is the purpose of the XMLHttpRequest property 'onprogress' in Ajax?

To handle errors during the request

To monitor the change in the ready state of the request

To track the progress of the data transfer

To define the response type

16. In Ajax, what does the term 'asynchronous' refer to?

Simultaneous execution of multiple functions

Executing code in a sequential manner

Delegating tasks to a separate thread

Performing tasks without waiting for the completion of previous ones

17. Which attribute is used to set the content type of an Ajax request?

contentType

type

dataType

requestType

18. What does Ajax stand for?

Asynchronous JavaScript and XML

Advanced JavaScript and XML

Ajax is not an acronym

Automated JavaScript and XML

19. What role does the 'withCredentials' property play in Ajax requests?

It specifies whether credentials should be included in cross-origin requests

It defines the content type of the request

It sets the timeout for the request

It determines the request method

20. How does the 'same-origin policy' impact Ajax requests?

It ensures all requests are executed synchronously

It allows requests to any origin without restrictions

It restricts requests to the same origin for security reasons

It defines custom headers for cross-origin requests

21. What is the purpose of the 'responseType' property in the XMLHttpRequest object?

To set custom headers in the request

To define the response type

To monitor the change in the ready state of the request

To handle errors during the request

22. Which method is used to initiate an Ajax request in JavaScript?

startRequest()

triggerAjax()

executeAsync()

send()

23. In Ajax, what is the purpose of the XMLHttpRequest method 'getAllResponseHeaders'?

To retrieve the content of the server response

To obtain the response headers as a string

To extract the URL of the current page

To validate the status of the request

24. How does the 'Blob' object contribute to handling responses in Ajax?

To set custom headers in the request

To define the response type

To create and manipulate binary data

To execute code when the request completes successfully

25. What is the role of the 'onabort' event in Ajax?

To handle errors during the request

To initiate an Ajax request

To monitor the change in the ready state of the request

To execute code when the request is aborted

26. What is the purpose of the 'onload' event in Ajax?

To handle errors during the request

To execute code when the request completes successfully

To set up the initial configuration of XMLHttpRequest

To track the progress of the data transfer

27. Which object is commonly used to perform asynchronous requests in Ajax?

XMLHttpRequest

AjaxRequest

AsynchronousRequest

HTTPAsyncObject

28. What role does the 'onreadystatechange' event play in Ajax?

It triggers the Ajax request

It defines the response type

It handles the server response

It monitors the change in the ready state of the request

29. What is the purpose of the 'async' attribute in the XMLHttpRequest open method?

To specify the request method

To set the request headers

To indicate whether the request should be asynchronous or not

To define the response type

30. Which method is used to send an asynchronous request to the server in Ajax?

sendRequest()

postAsync()

transmit()

open() and send()

Ajax MCQ Test 2