Important documents include:
Solution Design Document (SDD)
Business Requirement Document (BRD)
Project Plan
Communication Plan
Quality & Acceptance Plan
Change Management Plan
Fit/Gap document
Functional Design Document (FDD)
Technical Design Document (TDD)
All documents should follow SMART principles.
First read the answer fully, then try to explain it in your own words. After that, open a few related questions and compare the concepts. This method helps you remember the topic for a longer time and improves exam preparation.