To get an overview, I have compiled a list of topics. Some are only listed by name, others have links which you can follow, others are even detailed with a few words.
- Structuring documents with section, article element and associates
- Figure and Figcaption
Figure seemed to be important to Microsoft. During my exam, I even got the same question twice, one directly following the other. Only the answer had to be provided differently.
- CSS multi-column layouts
- Positioning of elements using static, relative, absolute, fixed
- CSS3 flexible box model
- -ms-grid Layout
- Exclusions such as -ms-wrap-flow, -ms-wrap-through and -ms-wrap-side
- CSS selectors
… and some others, of course 🙂
Hope that helps