There’s some new elements in HTML5 that I don’t regularly use. I’m definitely glad I studied up on those via this W3C article HTML differences from HTML4. Same goes for the new features in CSS3 you can read about in articles like this: What’s New in CSS3? – Notes of Genius.
Have you scheduled your exam yet?
|Using the DOM||jQuery DOM manipulation
Browser storage APIs
Object and variable scope
Wiring up events
|Working with Data||Consuming JSON, XML
HTML input type validation
|CSS Features||Flexible layouts and adaptive UI
Screen size targeting
2D and 3D Transforms
Ways to show/hide controls