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AQA COMP3 June 2012 Exam Thread

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    (Original post by drspa44)
    In a bus or star network, can there be a collision with incoming and outgoing traffic between the same two nodes? In which case, to state 'no collisions' as an advantage of a star network would be wrong.
    Indeed but signals that aren't destined for either the sender or receiver will not cause collision
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    To add to exam2k10's prediction,
    (Original post by exam2k10)
    This is what Im going for now, based on the papers I have done.
    ...
    • Traversal of Binary Trees (Inorder, Preorder, Postorder, Depth First, Breadth First)
    • Hashing
    • Insertion Sort
    • Traversal of Binary Trees which involve a stack, thus making it a recursive routine
    • SQL + Normalisation
    • Peer To Peer networks/ public key + private key
    • Firewalls
    • Thin Computing vs Rich Computing (Can someone please give me a good answer to this as I feel that it may come up)
    • OS Classification, API, Virtual machine
    • Abstraction + Information hiding
    • Stages of simulation
    • 'Interesting Binary Numbers' - under the Binary section, things like smallest/biggest
    • Hand Trace recursion (can't remember who's post this was from, but saw it about page 8)



    Can't think of anything else, but good luck to everyone!
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    Gonna start getting ready for School.

    Good Luck to Everyone!!! Lets hope for an easy Paper
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    Heading to school now so I can grab some lunch and skim read through everything. Best of luck to everyone
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    I found COMP2 ridiculously easy last year, hoping today goes equally well.

    But if not, I take comfort in knowing I can afford to loose some marks due to relatively low grade boundaries. It's about 80/100 for an A* and 70/100 for an A.
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    I'm off. Good luck everyone!
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    I thought the paper was really suited to my strengths and all the questions I thought that would come up, came up.. Really easy paper in my opinion if you know the definitions.
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    Not too bad a paper, looking forward to other peoples answers


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    I was expecting much worse tbh. Everything that came up I'd revised for so hopefully I've worded all the definitions correctly! That recursion trace table was a b*tch though, took me about half an hour to do just that! I'd say overall quite an easy paper.
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    I agree with those who found it quite easy. Though I expect I'd have said the same about the previous papers. And TSR probably isn't representative of everybody sitting it.
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    (Original post by Prings21)
    I was expecting much worse tbh. Everything that came up I'd revised for so hopefully I've worded all the definitions correctly! That recursion trace table was a b*tch though, took me about half an hour to do just that! I'd say overall quite an easy paper.
    I felt it was ok. I think I messed up on the recursion trace and the fill in the blanks was a silly error on my part as I couldn't remember the second bit Other than that it should be ok. What did you get for the order of complexity for the first algorithm?
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    (Original post by Yash13)
    I felt it was ok. I think I messed up on the recursion trace and the fill in the blanks was a silly error on my part as I couldn't remember the second bit Other than that it should be ok. What did you get for the order of complexity for the first algorithm?
    I put a^n
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    (Original post by drumdrum)
    I put a^n
    Pretty sure it was n^2. Although I'm not sure why the algorithm doesn't work in some cases...
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    (Original post by drumdrum)
    I put a^n
    Damn I put O(n) :afraid:
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    (Original post by Yash13)
    Damn I put O(n) :afraid:
    Ahh im not saying for a second im right, 'n^2' was my first answer however. I assumed it wasn't 'n' because that means its linear right?
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    (Original post by drumdrum)
    Ahh im not saying for a second im right, 'n^2' was my first answer however. I assumed it wasn't 'n' because that means its linear right?
    The basic operation decides order of complexity? So the Bop was W1 = W2, I thought that is a linear comparison. I don't know makes me a bit sick when I think of it. Only 3 marks so its ok I guess but they build up
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    It was n^2 because n^2 basic operations were carried out.
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    For that three mark dry run table I swear there was no output.

    I then went on to say that it was O(n) cos I swear it was some sort of linear search

    On the whole, I think the paper was good.

    For the normalisation question, what did people put down for the two properties regarding the relations?
    I put..
    1) There should be no redundacies
    2) There should be no repeating groups
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    (Original post by exam2k10)
    For that three mark dry run table I swear there was no output.
    I thought there was 2 :confused:
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    N^2 should have been correct, as is was a nested for loop, cycling through n times twice. Technically it should be 2n^2, as there were 2 comparisons, but multiples dont matter


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Updated: January 6, 2013
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