Chapter 9

1. No, it is an in-memory dictionary that can be used as a cache or for other in-memory storage needs.
2. Yes, they are. Most of this chapter's sections are dedicated to explaining why.
3. Write operations.
4. The main weaknesses of NoSQL databases are their consistency and transactions, while their main advantage is performance, especially when it comes to handling distributed writes.
5. Eventual, Consistency Prefix, Session, Bounded Staleness, Strong.
6. No, they are not efficient in a distributed environment. GUID-based strings perform better, since their uniqueness is automatic and doesn't require synchronization operations.
7. OwnsMany and OwnsOne.
8. Yes, they can. Once you use SelectMany, indices can be used to search for nested objects.