Defensive design, helps to ensure programs function properly., Defensive design involves, anticipating how users might misuse their program, ensure code is well maintained and reduce number of errors in the code when testing., Input validation is, checking if data meets certain criteria., Range check, Checks data is within a specified range (min and max)., Presence check, Checks data has actually been entered., Format check, Checks the data is in correct format (e.g. dd/mm/yyyy)., Length check, Check data meets the correct length (e.g. at least 8 characters for a new password)., Authentication, Allowing authorised users into a system confirming their identity., Verification, Ensuring the data is entered correctly., An example of.........., Input Validation, An example of........., Authentication

DEFENSIVE DESIGN

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