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From memory counting loops in pseudocode are covered in the Prelim SDD course not specifically in the HSC course. This, of course, means they can be examined in the HSC but the chances would tend to be less likely. Fatmuscle: That's code NOT pseudocode, the markers may have a spack if you...

The syllabus and related support documents are a bit hazy in regard to FOR...NEXT loops. They could use them in pseudocode in an HSC question, but not on a flowchart. The most likely syntax would be something like... FOR Counter taking initial value of 1 TO 100 BY steps of 2 ... ENDFOR...

Here's my simple one: BEGIN WHILE More items to insert Find where the current item should go Make a space for it Shove the item in the space ENDWHILE END If asked in the HSC, you'd get some marks for this but obviously a bit more detail would be needed. Are you...

A morph is a single distinct form, usually an animal e.g. a caterpillar is a morph of a butterfly. Poly means many, so polymorphism is the ability to take on different forms whilst still being the same thing. ie. both the caterpillar and the butterfly are genetically the same but quite...

A good discussion on various defintions of encapsulation can be found at http://www.itmweb.com/essay550.htm And for polymorphism check out this pdf http://www.ida.his.se/~jonas/ComponentSoftwareCourse/ch6-team2.pdf I think both these document are relatively understandable and provide...

The processing information process, according to the syllabus, has to alter the data in some way. Formatting it nicely for the user does not alter the data, it is really an organising process. You therefore need to think about processes that change the data, which I acknowledge is not so easy...

Organising - Think about how the data is arranged and howit is represented within the system. For example if its a spreadsheet then the data is arranged into a 2 dimensional grid of cells where each cell represents the data (or formulas) as numbers, or text... Analysing - Think about the...

It's the amplitude of the sound wave that is sampled not the frequency. For CD quality sound 44100 samples are taken every second. Why 44100? Humans can hear sounds within a frequency range of 20 to 20000Hz. A frequency of 20000Hz means 20000 complete waves every second, by taking 44100...

Yes many texts disagree, however the generally accepted differences are: - Data validation ensures the data entered is reasonable and of the correct type at the time of collection. For example your IPT HSC mark should be an Integer in the range 0 to 100. Validation does not ensure that the...

Where did you see this term used? It's not in the syllabus. One would tend to assume it is referrring to something like a structure diagram. Structures diagrams show the refinement of the problem into a hierarchy of subroutines. They also show the parameters used to pass data, this...

No I don't. Geoff Lancaster is a friend of my brothers, and he was in my 3U Computing marking group at HSC marking a few years ago. From memory Barker, or at least the Deputy Principal, (can't think of his name at the moment) is a keen user of my UAI Estimator. Did you use it, or get...

Wow, impressive Geoff's autograph!!! Did you go to Barker?

An expert system shell is the software application that uses the knowledge base. The knowledge base is essentially a database containing all the facts, rules and probabilities. Together the expert system shell and the knowledge base form the essential components of an expert system. An expert...

If you're only using 8 bits then you can't represent 255 at all. The range is -128 to 127 and that's it. In reality, applications don't often use 8 bit twos complement, however 16 bit twos complement is very common. If you've got MS-Access, create a table with some field. Set the datatype to...

I'm happy to post answers to any particular questions from my book or from anywhere else for that matter, but I wont be posting all the answers. I'm trying to make a living, and part of my living is selling the teacher resource kit. Sam

The computer has to understand the rules of the game (or the rules of the number system). If a computer was to use a 10's complement system like you discuss, then it would also need to know that 0-499 were positives (or more accurately non-negatives), and that 500-999 were negatives. It's...

Truth tables for flip-flops are not easy to comprehend if you look at each set of inputs in isolation. By the way the circuit shown in wogboy's flipflop.gif is really a latch, this is just the data store part of the flip-flop. In reality there are further components to control the change of...

It's an Insertion sort! - The outside loop iterates through each item from the second last one to the first one using the backwards counter PositionOfNext. (This doesn't help much as this is pretty much the case for all the three sorts.) - The inside loop shuffles the data down until the...

The main problem is that every algorithm question is different. Writing algorithms is not something you can learn by rote and just spew out an answer. However you do need to understand the principles behind each of the standard searches and sorts. Some possible tips include: - Try to solve a...

Can you please specify the precise Ind paper year and question number, together with the 3U paper and question. I put all the independent papers together and this sort of thing should not happen. Sam