A 3.3.6 Worksheet Answers
1. Scenario: A bank customer attempts to withdraw £50 from their account, but the system crashes midway through the transaction. When the system restarts, the customer's balance is the same as it was before the withdrawal attempt. 2. Scenario: A database for a library has a rule that the number of borrowed books cannot exceed the number of copies available. A transaction attempts to record a borrowing that would...