[Year 12 SofDev] VCAA sample questions and examiniation advicerevisited

[Robert]

Hi Heath,

Hope someone else with more recent SOD expertise can help you.

I would agree that arrays and linked lists can hold only one data type while records can hold several different data types.

Linked lists are, as you say, ordered and sequential while arrays (1, 2 or 3 D) allow random access. Records? All the data for one record is stored together, the records being stored in order of entry, and the whole data table may be indexed on any one of the data items in the record.

How much more would they want for 6 marks?

Anyway, good luck that your SOD year finishes soon. I start ITA exam marking with the training session on Friday and then a fairly hectic week.

Robert Hind (Semi-retired)
Ashwood and Traralgon
robert at yinnar.com



  ----- Original Message ----- 
  From: Matheson, Heath A 
  To: sofdev at edulists.com.au 
  Sent: Monday, November 09, 2009 2:08 PM
  Subject: [Year 12 SofDev] VCAA sample questions and examiniation advicerevisited


  Heya all,

   

  Some of my students are going through the sample questions posted back in April 07 on the SD VCAA website.  I looked back at the archives (Apr 07) and found Mark and Gordon's multi choice answers which I agreed with but I'm trying to work out what is expected from Question 2 of section B. 

   

  It states:  Three simple types of data structure are arrays, records and linked lists.

  For each of these three data structures, identify the types of data that they deal with and the way the data is organised. (6 marks)

   

  Is "types of data" different from "data types"? 

   

  My thoughts are linked lists are sequential and ordered while arrays can have random access, is this organisation?

  An array can only hold one data type while a record can have several different data types.

   

  I would love some help on this one. 

  Three sleeps til I can clear the mess of exam papers off my desk!

  Cheers! 

   

  Heath Matheson

  Mount Beauty Secondary College

  Ph (03) 5754 4005

   


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