Candidates for this exam should have one or more years of experience programming the essential business and application logic for a variety of application types and hardware and software platforms using JavaScript. Candidates should also have a minimum of one to two years of experience developing with HTML in an object-oriented and event-driven programming model.Candidates should also have a thorough understanding managing program flow and events; understanding of asynchronous programming and threading; understanding of data validation and working with data collections including JQuery; handling errors, exceptions, arrays, and collections; working with variables, operators, and expressions;working with prototypes and methods; and making decision and iteration statements. http://www.microsoft.com/learning/en-us/exam-70-480.aspx.
The skills measured include implementing and manipulating document structures and objects; creating the document structure; writing the code that interacts with user interface (UI) controls; applying styling to HTML elements programmatically; implementing HTML5 application program interfaces (APIs); establishing the scope of objects and variables; creating and implementing objects and methods; implementing program flows; raising and handling an event; implementing excepting handling; implementing a callback; creating a web worker process; accessing and securing data; validating user input by using HTML5 elements and JavaScript (does not include writing regular expressions); serializing, deserializing, and transmitting data; using CSS3 in applications; styling HTML text properties and HTML box properties; creating a flexible content layout and animated and adaptive UI; finding elements by using CSS selectors and JQuery; and structuring a CSS file by using CSS selectors.