An online system is being developed for booking concert tickets. Customers must input various details, including their age, the number of tickets they wish to purchase (between 1 and 6), and their booking email address.
Validating inputs can prevent invalid data from being processed by the system.
Identify two different validation techniques and explain how each can be used to validate inputs in this ticket booking system.
14 exam-style questions on OCR GCSE Computer Science Defensive design. Each one has a worked solution and a mark scheme showing where the marks go.