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I would interpret "static transformation" here as meaning "eager
transformation", i.e doing the transformation as soon as new information
arrives. And that's possibly a sensible strategy, though there is far too
little information to say this definitively. For example, if prices are
being updated 1000 times per second and the information is only needed once
per hour, then it would be crazy.
You have to accept with a simplistic quiz like this that the more you know,
the more you will be aware that the right answer might not be right after
all. If you ask a maths professor what the sum of the angles of a triangle
is, they will ask you whether the space you are in has positive or negative
curvature...
Michael Kay
http://www.saxonica.com/
> -----Original Message-----
> From: Razvan MIHAIU [mailto:mihaiu@mihaiu.name]
> Sent: 27 March 2005 05:50
> To: xml-dev@lists.xml.org
> Subject: [xml-dev] Quiz: static transformation vs. JIT generation
>
>
>
> Hi,
>
>
>
>
>
> On an XML quiz I met the following question:
>
> = = =
>
> A company wants to build a Website for trading shares. They have the
> latest updates coming to them from various exchanges in XML
> format and
> they need to be able to supply the updates to the client on various
> platforms: web + mobile + handheld devices. A processing application
> would analyze the incoming documents and update the central database.
> Since this is a real-time process the performance is a
> critical requirement.
>
> Which one would be the best approach for storing the rate updates ?
>
> A. separate xml documents for each share
> B. a single document for each share
> C. static transformations for generating the output XML documents
> D. just in time transformation of output XML documents
>
>
> = = =
>
> My answer: B
> The correct answer: C
>
>
>
> To my understanding 'static transformations' means to
> generate HTML
> pages from an XML source and to feed those pages to all the clients.
> 'Just in time transformations' means to transform the XML to HTML for
> each client that requests the data.
>
> Is it practical to apply 'static transformations' to some
> data that
> needs to be processed "real-time" ? If yes, how often would you apply
> the 'static transformation' ? If the data changes every
> second you will
> have to apply the 'static transformations' every second !
>
> Is there another way to interpret this question ?
>
>
>
> Regards,
> Razvan
>
>
>
> www.mihaiu.name
>
>
>
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