## Exam Keywords - Storage and Indexing

1. Storage
    * Data on External Storage (Important points to keep in mind: Disks, tapes and records)
    * Physical characteristics of disks and tapes, and how do they affect the design of database systems.
    * Levels of Redundancy (RAID levels)
2. Indexes
    * B+ Tree Indexes
    * Hash-Based Indexes
    * Clustered vs. Unclustered Index
    * Choice of Indexes