Defensive Design

Open Ended

What is a type check?

​Type Check:
A data validation technique that checks if data is of the correct type, e.g. integer or string

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What is a range check?

​Range Check:
A data validation technique that checks if data is between a set of values, e.g. 1...100 or A...Z

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What is a presence check?

​Presence Check:
A data validation technique that checks if data is present

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What is a format check?

Format Check:
A data validation technique that checks if data is a particular format...e.g.
Postcode : CB4 3NY
email : [e-mail]

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What is a length check?

Format Check:
A data validation technique that checks if data is a particular format...e.g.
Postcode : CB4 3NY
email : [e-mail]

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What is data verification?

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What is data sanitisation?

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What are strong passwords and why are they needed?

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Why do some phones only allow you to make three tries at a password?

​To defend against brute force attacks.

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What is two-factor authentication and why does help stop unauthorised access?

​Picture round.....see powerpoint

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Why do programs need to be maintained?

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What are naming conventions and why do they make code more maintainable?

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Try to think of as many advantages with using sub-programs as you can

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What is indentation and why does it make code more maintainable?

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What is commenting and why does it make code more maintainable?