[Year 12 SofDev] FW: SD 2012 post mortem

[Kevork KROZIAN]

 Hi Folks,



 Section C Q10b - only 1 mark , however



The question states:



Not all numbers between 3000 and 3999 are used as postcodes in Victoria. Ilma decides to include a function that checks whether the entered number matches a postcode that is used in Victoria. How is this type of validation best described ?





The only  validation mentioned in the study design is :



        validation techniques, including existence checking, range checking

and type checking   ( SAC31 )



Existence checking is ensuring that data is entered.





        Wikipedia describes the type of validation mentioned here as :



        Table Look Up Check



        A table look up check takes the entered data item and compares it to

a valid list of entries that are stored in a database table.



        http://en.wikipedia.org/wiki/Data_validation [1]



      If a student says I didn't answer the question because it wasn't one of the validation types we studied what would our answer be apart from never leave a blank?

Part (a) covers type (  a number )  and range ( 3000 to 3999 inclusive ) and existence as outlined in the introduction to the question.

If used postcodes between 3000 and 3999 were contiguous a further range check could be carried out. But the question does not offer a hint here.  Are students expected to know the answer to this ?



So, if (since) the new validation description asked is not one of the three mentioned in the study design what is the answer ?





Speak soon

Kevork Krozian
IT Pathways Manager
Ringwood Trade Training Facility
Tel: 0419 356 034


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