21. To improve performance, you should call the ____ method of : 1321049

21. To improve performance, you should call the ____ method of : 1321049.

 

21. To improve performance, you should call the ____ method of the XMLHttpRequest object to cancel any existing HTTP requests before beginning a new one.

a. exit()b. abort()

c. cancel()d. delete()

 

 

 

22. After you have defined the basic request criteria, you use the ____ method with the instantiated XMLHttpRequest object to submit the request to the server.

a. pass()b. request()

c. send()d. call()

 

 

 

23. A(n) ____ request stops the processing of the JavaScript code until a response is returned from the server.

a. asynchronousb. global

c. domaind. synchronous

 

 

 

24. The value of the responseText property is almost always a(n) ____ string.?

a. ?XMLb. ?XHTML

c. ?JSONd. ?HTML

 

 

 

25. ____ requests JSON content using a script element rather than an XMLHttpRequest object.?

a. ?JSON-Pb. ?CORS

c. ?proxyd. ?XDomainRequest

 

 

 

 

 

21. To improve performance, you should call the ____ method of : 1321049

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