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

Mon Oct 15 22:10:42 EST 2007

Ah, but FOR..NEXT does test whether the index is beyond the specified 
boundaries.

e.g. FOR i = 1 to 5

is an implicit pre-test for i>5.

Cheers
Mark

Kevin Feely wrote:
> 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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>>    1. SD VITTA exam 2, multichoice #1 (Mark Kelly)
>>
>>
>> ----------------------------------------------------------------------
>>
>> 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
>> Direct line / Voicemail: 8520 9085
>> School Phone +613 8520 9000
>> School Fax +613 95789253
>> kel AT mckinnonsc.vic.edu.au
>>
>> Webmaster - http://www.mckinnonsc.vic.edu.au 
>> <http://www.mckinnonsc.vic.edu.au/>
>> IT Lecture notes: http://vceit.com <http://vceit.com/>
>> Moderator: IT Applications Mailing List
>>
>> You'll know when we are officially a civilised race: our schools have
>> all the money they need and the Air Force has to run a chook raffle to
>> buy a new bomber.
>>
>>
>>
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-- 
Mark Kelly
Manager - Information Systems
McKinnon Secondary College
McKinnon Rd, McKinnon 3204, Victoria, Australia
Direct line / Voicemail: 8520 9085
School Phone +613 8520 9000, Fax +613 95789253
kel AT mckinnonsc.vic.edu.au

Webmaster - http://www.mckinnonsc.vic.edu.au
IT Lecture notes: http://vceit.com
Moderator: IT Applications Mailing List

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