Learning PHP, MySQL, and JavaScript

Test Your Knowledge: Questions

Question 18-1

Why is it necessary to write a function for creating new XMLHttpRequest objects?

Question 18-2

What is the purpose of the try...catch construct?

Question 18-3

How many properties and how many methods does an XMLHttpRequest object have?

Question 18-4

How can you tell when an Ajax call has completed?

Question 18-5

How do you know whether an Ajax call completed successfully?

Question 18-6

What XMLHttpRequest object’s property returns an Ajax text response?

Question 18-7

What XMLHttpRequest object’s property returns an Ajax XML response?

Question 18-8

How can you specify a callback function to handle Ajax responses?

Question 18-9

What XMLHttpRequest method is used to initiate an Ajax request?

Question 18-10

What are the main differences between an Ajax GET and POST request?

See the section Chapter 18 Answers in Appendix A for the answers to these questions.