This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Your answer is perfectly write. The j2eecertificate exam is based on the old servlet specifications i.e 2.3. In that version of specification the order of elements is important. But as per the Servlet 2.4 servlet specification the order of top elements under <web-app> is not required. I mean you can specify the elements in any order.