I have all answers written done, could you please check them for me? Thanks a lot!

Truth or False:

1. A data warehouse stores refined data, while a data lake stores raw data. ( F )
2. If I buy a cup of coffee at Starbucks, the data is stored in OLAP database. ( T )
3. NoSQL databases typically use schema-on-write ( F )
4. A NewSQL database is a kind of relational database. ( T )
5. If a relation is in 3NF, then it is always in 2NF. ( T )
6. Query processing is more efficient in a schema in a higher normal form than in a lower normal form, since the higher normal form causes smaller relations. ( T )
7. Functional dependencies in a given relation cannot be changed after updates of tuples. ( T )
8. If 1NF relation R does not have composite keys, then R is in 2NF. ( T )
9. XY --> ZWV can be decomposed into X --> ZW and Y --> ZW. ( F )
10. Denormalization can be performed from beginning of the database development. ( F )