<div dir="ltr">This is where I cover data structures - Variables, records, ID arrays, Dictionaries and Hash tables.<div>Explaining hash functions demonstrates how data is stored and accessed efficiently.</div><div><br></div><div>Then I compare different search approaches for an array ( n ) - Linear Search = O<font size="1">n</font>, Binary search = O<font size="1">log n</font> and Hash functions = O<font size="1">1</font> </div><div><br></div><div>You can also talk about the ease of data access via a separate files so that it can retained after the system is shut down.</div><div>Global and Local Variables are stored temporarily for different reasons.</div><div><br></div><div>I don't teach the dot point in isolation with the rest of the course though.</div><div><br></div><div>Hope that helps.</div><div>Vic</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jul 21, 2017 at 3:22 PM, Ben Hines <span dir="ltr"><<a href="mailto:b.hines@ccg.vic.edu.au" target="_blank">b.hines@ccg.vic.edu.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-AU" link="#0563C1" vlink="#954F72">
<div class="m_-8586937924775525223WordSection1">
<p class="MsoNormal">Hi all,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I was just wondering what other SD teachers discuss with their students on U4O1 KK1: ways in which file size, storage medium and organisation of files affect access of data.
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">It seems pretty vague to me and I’m not sure where I’m supposed to focus on for any particular exam questions etc…<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Regards<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Ben Hines<u></u><u></u></p>
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<p style="font-family:Arial" id="m_-8586937924775525223c1-id-7"><font face="calibri" id="m_-8586937924775525223c1-id-8"><font face="calibri" id="m_-8586937924775525223c1-id-9"><font color="#800000" size="2" id="m_-8586937924775525223c1-id-10"><font size="3" id="m_-8586937924775525223c1-id-11"><strong id="m_-8586937924775525223c1-id-12">Ben Hines<br id="m_-8586937924775525223c1-id-13">
</strong></font><font size="3" id="m_-8586937924775525223c1-id-14">Mathematics and ICT Teacher<br id="m_-8586937924775525223c1-id-15">
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