Validation and Authentication Flashcards

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Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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What is validation in a program?

Checks on input to make sure it meets set rules. It reduces errors but does not prove the data is right.

It makes sure a required field is not left blank.

It checks a value is between a set minimum and maximum.

It checks data is not too short or too long.

It checks the input is the right data type, like integer, real, or string.

It checks the input matches a pattern, like a UK postcode (e.g. AB1 2CD).

A value can pass the rules but still be wrong, like a wrong age within the range.

Proving a user is who they say they are before giving access.

A username and password, and a fingerprint or face scan.

Logging in with two different checks, like a password plus a code sent to your phone.

To stop guessing attacks. After a few tries, the account locks or waits.

At least 12 characters with a mix of letters, numbers, and symbols. Do not use common words.