OCR GCSE CS MCQs 2.3 Defensive Design

Which of these is not a method for ensuring a program is robust?

• Keeping passwords safe

• Data Validation

• Authentication

• Data Sanitisation

Why is code indented?

• To group together a function

• The code does not use a { syntax and indentation is used instead

• To make the code easier to read

• All of the above

Which of these authentication methods is most secure?

• Password

• Password and username

• Key Card

• Physical and Code

Which of these IS NOT an example of validation

• Checking the number entered is 2 digits

• Asking the user to enter the same data in twice

• Use of a Lookup table

• Use of a presence check

What is data validation?

• Checking that the data entered is wrong

• Checking that the data entered is correct

• Checking that the data entered is sensible or reasonable

What does a range check do?

• Checks data across a range of numbers

• Checks the data is within an acceptable range

• Where three types of data are used

• Checks that the data is in the correct format

When a program runs it asks the user to enter their full name. Which is an example of Valid data?

• Mr Jones

• Sarah

• Sarah Jones

• Mrs Jones

Which one of these is not a method for planning for misuse?

• Limiting the number of login attempts

• Requesting a password and username

• Authentication

• Not validating the data entry

Which is not a method of authentication

• Password

• Password and user name

• Pattern Password

• Finger print password

What is maintainability?

• Checking programs work

• Updating Code so that it is compatible with current requirements

• Testing a program for errors

• Training staff to use the program correctly