Book excerpt: Fully updated! Prepare for Microsoft Exam 70-481 - and help demonstrate your real-world mastery of Windows Store app development using HTML5 and JavaScript. Designed for experienced developers ready to advance their status, Exam Ref focuses on the critical-thinking and decision-making acumen needed for success at the MCSD level. Focus on the expertise measured by these objectives: Design Windows Store apps Develop Windows Store apps Create the user interface Program user interaction Manage security and data This Microsoft Exam Ref: Is fully updated for Windows 8.1 and Visual Studio 2013 Organizes its coverage by objectives for Exam 70-481 Features strategic, what-if scenarios to challenge you Requires a minimum of two to five years of experience developing HTML, CSS, and JavaScript applications, including one or more years developing applications that conform to the Windows Store app guidelines