4 A programmer has written a routine to store the name, email address and password of a contributor to a website's discussion group.

Mark scheme

Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.

1. [4] Max 4 in total
2. Any 3 from:
3. • To ensure no changes are made on input / accuracy of transcription
4. • Because the details do not have fixed, values or lengths to validate
5. • Because there is no clear set of rules that can be used for validation
6. Any 3 from:
7. • The programmer could ask the contributor to type in each detail twice ... and then check that both values are equal
8. • If they are not equal then the input should be rejected
9. • The programmer could ask the contributor to check the details on the screen ... and confirm that they are correct / same as the original
10. • ... or change them
11. [2] One mark for email and one mark for password
12. Email - check for @ / format check / no spaces /valid characters // presence check // length check (not more than 254 characters) // uniqueness check
13. Password - length check / numbers and letters etc. // uniqueness check not been used before // presence check