FastTrack is Microsoft’s customer success service, and Success by Design is the architectural guidance used by FastTrack solution architects.
Since not all projects qualify for FastTrack, Microsoft provides a self-service version of Success by Design that partners and customers can use independently to achieve similar outcomes.
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.