1. The ability of a distributed system to add new nodes and redistribute data and processing without interruptions and changing the system is called A. vertical fragmentation B. vertical scalability C. horizontal scalability D. horizontal fragmentation

2. Which of the following data architecture patterns are used in RDBMSs? Select all that apply. A. Column store B. Column family store C. Key-value store D. Row store E. Document store F. Graph store

3. Which of the following are ACID properties? Select all that apply. A. Nodes have the same copy of replicated data B. Transaction must take database from one consistent state to another C. Transaction is either performed in its entirety or not performed at all D. If network partitions the system, system is able to operate within each subset E. Effects of committed transactions are permanent and must never be lost because of subsequent failure F. Each read and write completes successfully or receives message of failure G. Partial effects of incomplete transactions should not be visible to other transactions