Defensive design

What is a presence check ?

Making sure the user actually enters data

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What is a type check ?

Ensuring that data entered is of the correct data type .

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What is a length check ?

Making sure that data is of an acceptable length (characters) .

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What is a range check ?

Making sure that the value of data is within acceptable limits .

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What is a sequence check ?

Making sure that the value is within an acceptable list of values .

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What is a format check ?

Making sure that the data is in an acceptable format .

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Fill the gap :

Input sanitisation involves using techniques to _____
user data to remove _______
characters, mixed ____
and non-valid characters and leading/________
spaces. These characters can cause issues when the data is ________

Input sanitisation involves using techniques to clean user data to remove control characters, mixed case and non-valid characters and leading/trailing spaces. These characters can cause issues when the data is processed.

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Fill the gap:

Data validation involves using techniques which check the input data is of the correct data ____, structure or format for processing/storage.

Data validation involves using techniques which check the input data is of the correct data type, structure or format for processing/storage.

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What are trailing spaces ?

Spaces after the characters in a string .

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What are control characters ?

Special characters designed to transmit signals .

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What are mixed case characters ?

Mixtures of upper and lower case letters .

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What are non valid characters ?

Characters which are not numbers, letters or symbols .

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What are leading spaces ?

Spaces before the characters in a string .

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Defensive design

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