defensive design

What is defensive design?

• Contingency planning for protection against hackers

• Contingency planning for protection against malware

• Contingency planning using validation, maintainable code and testing

What is the purpose of validation?

• To ensure that data entered is sensible and possible

• To ensure that the programmer has met all requirements

• To ensure that data entered is correct

What does validation not do?

• Ensure that data entered is of the right data type

• Ensure that data is actually entered

• Ensure that data entered is correct

Which of the following are validation techniques?

• Presence check, length check, verification check

• Presence check, format check, range check

• Presence check, range check, verification check

Which of the following are part of maintainability?

• Comments, sensible variable names and indentation

• Comments, sensible variable names and verification

• Comments, indentation and verification

What are the two types of programming error?

• Syntax errors and logic errors

• Syntax errors and validation errors

• Logic errors and validation errors

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 errors may cause program errors or the computer to crash even if there appears to be nothing wrong with the program code?

• Syntax errors

• Runtime errors

• Logic errors

• Memory errors