Access and secure data - Programming in HTML5 with JavaScript and CSS3 - page 218

■ isNaN is a built-in function to determine whether a value isn't a number, whereas
isFinite validates whether the value is a finite number.
■ Code injection is a technique that attackers use to inject malicious code into your
application.
■ iFrames and dynamic JavaScript are dangerous if not used properly in a webpage.

Objective review

Which of the following regular expression characters denote the end of the string?

1.

$ A.

%

B.

^ C.

& D.

Which of the following sandbox attributes allows the iFrame to load content from the
containing HTML document?
A. allow-script-execution
B. allow-same-origin
C. allow-forms
D. allow-top-navigation
E. allow-top-document

2.

Which function should never be used to run JavaScript?
A. execute
B. JSDynamic
C. eval
D. evaluate

3.

Objective 3.3: Consume data

This objective covers how to consume data in an HTML5 web application. The ability to
consume data from external sources is more popular than ever. Website mash-ups and social
integration are major catalysts for this.

This objective covers how to:
■ Consume JSON and XML data by using web services
■ Use the XMLHTTPRequest object