Describe the modeling approaches, together with best practice, used

when designing $($i$)$ relational databases, and $($ii$)$ collection$-$based

databases $($such as MongoDB$)$ for use in web$-$based applications.

Describe the situations where an normalised approach to data modeling

for MongoDB would be preferable to a de$-$normalised $($embedded$)$

approach.

Describe an approach to support retention of historical data for entities in

a MongoDB database.

Please refer to document size, and the frequency with which documents

are changed, as factors in document change history tracking.