1. False: DynamoDB is addressable via standard HTTP.
2. ACID is fully consistent, while BASE defines eventual consistency.
3. A NoSQL database would be perfect for sessions – it doesn't matter what the application does – it can use SQL on the BI part, but for sessions of NoSQL.
4. C – PUT, R – GET, U – UPDATE, D – DELETE.
5. Tables contain items and items are composed of attributes.
6. 400 KB.
7. Provisioned throughput and on-demand.
8. By dividing 50 MB by 1.5 KB, we get approximately 34.200 items being sent every second to the table – but each item consumes 2 WCUs, meaning we'll need to provision approximately 68.400 WCUs for the table. We're being throttled by the soft limit of 40.000 WCUs per table in the us-west-2 region. We would need to contact AWS to raise the service limit for this table. 
9. Create a table with:
   • Primary key username: To be able to list users
   • Sort key date: So that we can have multiple entries for each student to take the test multiple times
   • Score as the primary key and username for the sort key for the global secondary index: To rank users by score