Defensive Design - GCSE Computer Science OCR

(a)   is a check made by a computer to ensure that the data entered is sensible or reasonable.

What type of validation would be used on a field to enter a mobile phone number to ensure it contains 11 digits

• Spell check

• Lookup table

• Presence check

• Length check

What type of validation would be used on a field to check that data has been entered?

• Spell check

• Lookup table

• Presence check

• Length check

What type of validation is when the last one or two digits in a code are used to check the other digits are correct?

• Spell check

• Check digit

• Presence check

• Length check

What type of validation is used to check that a value falls within the specified range

• Spell check

• Range check

• Presence check

• Length check

What type of validation should be used to ensure a National Insurance number is in the form LL 99 99 99 L where L is any letter and 9 is any number?

• Format check

• Range check

• Presence check

• Length check

Another method for validating data and stopping attacks is to clean up the data that is inputted so that it is ready for the application to use.

(a)   trims or strips strings, removing unwanted characters from strings

Which one of the following inputs for an email address would not require data santisation?

• dave.smith@company.c

• [e-mail]

• dave@[e-mail]

• dave [e-mail]

(a)   will consider and anticipate misuse.

Misuse may be in the form of a brute force attack on the program

(a)   is a coding method to check that a user is who they say they are and allowed to access the program.