AQA A-level Computer Science (7517)Specification point 4.10.5

AQA 7517 4.10.5: Client server databases

The free BugBot lessons that teach this point, a robot to try it on, and the past-paper questions that test it.

Lessons that teach it

1. A11.6 Transactions and ACID Databases and big data
   A transaction is all or nothing: atomicity, consistency, isolation and durability, commit and rollback, and redundancy.
2. A11.7 Client server databases and concurrent access Databases and big data
   Many clients, one database: the lost update, and the four ways to prevent it: record locks, serialisation, timestamp ordering and…

Try it on a robot

The task from A11.6 Transactions and ACID, running here. Change the program and press Run.

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