What does the status == 404 means ?

Choose the best statement for the expression JSON.stringify(jsObj);

Which will not execute request asynchronously provided usernameRequest object already exists?

Choose the statement that best describes the role of the success ‘key’

The readyState property in onreadystatechange event equal to 1 means ?

choose the option that shows the output to the console log

Most JavaScript libraries that provide AJAX support include this header in AJAX requests by default.

How do you manually abort an Ajax request after a certain amount of time?

Ajax can be used to open a connection from the server to the browser without the browser making an explicit request.

True or false? A GET request submitted through Ajax can never cause the server to delete data.

If an Ajax request loads JSON-formatted responseText into the variable returnedData, what code will turn the data into a readable JSON object in modern browsers, including IE8 and above?