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

1. 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

2. 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

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

sendRequest()

postAsync()

transmit()

open() and send()

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

GET

POST

PUT

DELETE

5. 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

6. What security measure is used to prevent Cross-Site Request Forgery (CSRF) in Ajax?

The 'same-origin policy'

The 'async' attribute in the 'script' tag

The 'CORS' policy

The 'X-Requested-With' header

7. 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

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

setHeaders()

addHeaders()

customHeaders()

setRequestHeader()

9. What is the purpose of the 'onerror' event in Ajax?

To define the response type

To execute code when the request completes successfully

To handle errors during the request

To monitor the change in the ready state of the request

10. What is the purpose of the XMLHttpRequest property 'responseText' in Ajax?

To store the HTML content of the current page

To store the raw server response as a string

To store the content type of the server response

To store the URL of the current page

11. What does Ajax stand for?

Asynchronous JavaScript and XML

Advanced JavaScript and XML

Ajax is not an acronym

Automated JavaScript and XML

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

onError

onAbort

onReadyStateChange

onSuccess

13. 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

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

contentType

type

dataType

requestType

15. 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

16. What is the role of the 'XMLHttpRequestUpload' object in Ajax?

To handle errors during the request

To initiate an Ajax request

To track the progress of the data transfer

To provide access to the upload-specific events

17. 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

18. 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

19. 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

20. How does the 'CORS' policy impact Ajax requests?

It ensures the request is executed synchronously

It restricts requests to the same origin for security reasons

It allows cross-origin requests without any restrictions

It defines custom headers for cross-origin requests

21. Which HTTP method is commonly used in Ajax for retrieving data from the server?

GET

POST

PUT

DELETE

22. Which status code indicates a successful Ajax request?

200 OK

404 Not Found

500 Internal Server Error

302 Found

23. What does the term 'preflight request' mean in the context of Ajax?

A request sent before the main request to check server capabilities

A request to validate the status of the server

A request with pre-defined headers

A request sent to multiple servers in parallel

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

abort()

cancel()

stop()

terminate()

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

executeParallel()

sendAsync()

performRequest()

Promise.all()

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

errorHandler()

handleError()

onError()

catchError()

27. Which attribute is used to set a timeout for an Ajax request?

timeout

delay

asyncTimeout

requestTimeout

28. 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

29. In Ajax, what does the term 'cross-origin' refer to?

Multiple server requests in parallel

Requests sent using different HTTP methods

Accessing resources from a different domain

Simultaneous execution of multiple Ajax functions

30. In Ajax, what does the term 'serialization' refer to?

The process of converting data into a string for transmission

The simultaneous execution of multiple functions

The handling of server responses

The validation of Ajax requests

31. What is the role of the Ajax callback function?

To define the HTML structure of the page

To handle the server response after an asynchronous request

To initiate an Ajax request

To set up the initial configuration of XMLHttpRequest

32. In Ajax, what is the purpose of the 'async' attribute in the 'script' tag?

To define the response type

To ensure the script is executed asynchronously

To set custom headers in the request

To handle errors during the request

33. 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

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

startRequest()

triggerAjax()

executeAsync()

send()

35. 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

36. 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

37. 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

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

parseXML()

decodeJSON()

evalJSON()

JSON.parse()

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

statusCode

responseStatus

status

HTTPStatus

40. 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

Ajax MCQ Test 1