[Year 12 SofDev] Validation naming

[Mark KELLY]

Hi campers.  A little audience participation question. Validation types in
the study design are:

   - existence checking
   - range checking
   - type checking

The 2010 SD exam <http:///postmortems/2010sd/SD2010exam.htm#c4> decided to
muddy the waters by describing these validation tests:

*Existence - to make sure that the number entered exists on Medicare's
database
Null - to make sure something has been entered
*
Now, I've always read "existence" as "has a value been entered?" (like
"Null" in the exam question).

How many of you good folk refer to existence testing as "existence in a
limited list", and how many would equate existence testing as null testing?

If you agree that the exam's terminology is unconventional, I am a bit
concerned about it being used in an exam where it could confuse students who
were taught the conventional interpretation.

Now I'm even doubtful about what the study design means by "existence
checking" - does it mean "null checking"?

Have a happy winding-down time, if you're luck enough to have one!

-- 
Mark Kelly
ICT Manager
Reporting Manager
IT Learning Area Manager

McKinnon Secondary College
McKinnon Rd McKinnon 3204
Victoria, Australia
Direct line / Voicemail: +613 8520 9085
Fax +613 9578 9253
kel at mckinnonsc.vic.edu.au

VCE IT Lecture Notes: http://vceit.com
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