[Year 12 SofDev] Re: SD VITTA exam 2, multichoice #1

[Kevin Feely]

Hi All,
I would approach the question with - is their a value for which this 
loop would NOT execute?
If it is a pre test condition then you will not get any processing from 
the lines within the loop, if it is a post test condition then the loop 
will execute AT LEAST ONCE.
Also i (that is me myself I mwa) accept that the logic of a do-while 
loop is to test the condition before the loop starts, and the 
repeat-until loop tests at the end of the loop (the construct within a 
language will vary BUT in generic terms i accept this "standard"), even 
though  the ACTUAL  written algorithm on the question is not perfect ( I 
suppose thats hard to do unless you write it in 9 diiferent languages, 
but then again it is supposed to be in pcode format and therefore 
language independent)
Also the for-next answer seems to be a bit of a distraction as it does 
not TEST for anything, it will simply loop as many times as you want, 
via a variable used as a counter,  and this could be from 0 times to a 
big number.
So i would think the expected answer was A
regards
kev


Sonia Cotugno wrote:
> I agree with you Mark.
>  
> I answered with (C) For...Next because none of the others tested at 
> the top of the loop. I think it's actually incorrect to say 
> Do...While. I really do think it should have said While as an option.
>  
> Regards,
> Sonia Cotugno
>  
>  
> Brighton Grammar School
> 90 Outer Cres
> Brighton VIC 3186
> (03) 8591 2200
> www.brightongrammar.vic.edu.au <http://www.brightongrammar.vic.edu.au>
>  
>  
>
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> *Sent:* Fri 10/12/2007 12:00 PM
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>    1. SD VITTA exam 2, multichoice #1 (Mark Kelly)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 12 Oct 2007 11:59:09 +1000
> From: Mark Kelly <kel at mckinnonsc.vic.edu.au>
> Subject: [Year 12 SofDev] SD VITTA exam 2, multichoice #1
> To: "Year 12 Software Development Teachers' Mailing List"
>         <sofdev at edulists.com.au>
> Message-ID: <470ED4ED.3020009 at mckinnonsc.vic.edu.au>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> I'm curious what others think...
>
> "Testing at the 'top of the loop' is performed by which syntax in
> pseudo-code?
>
> A. Do..While
> B. Do..Until
> C. For..Next
> D. EOF"
>
> The suggested answer given is A, with the explanation that 'Do..Until is
> often referred to as testing at the bottom of the loop...'
>
> But surely both do..while and do..until both test at the bottom of the 
> loop.
>
> A While..Wend, on the other hand, tests at the top.
>
> --
>
> Mark Kelly
> Manager - Information Systems
> McKinnon Secondary College
> McKinnon Rd McKinnon 3204, Victoria, Australia
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