Transactions & Isolation

Relational modelling, indexes, transactions, the NoSQL families and what each one is actually for, then replication and sharding. More interviews are lost on the storage layer than on any other part of the diagram.

This module is 02.3 of the 6 in Data Storage & Retrieval. It runs about 5 hours across 5 lessons, and closes with Anomaly — Two transactions interleave. Name the anomaly and the lowest isolation level that would have prevented it.