Exam questions & answers

What did you guys say was the design pattern for the Employee-boss-engeneer question? i thought it was Composite

And the Exchange rate one was a wrapper/Adaptor right?

I used Composite for the first one.

For the Exchange one I used Singleton but I'm not sure it's right.

what about the one where you ahve to say why the equivclass did not use a typedef? i had no idea . i thought later maybe because already equivclass is a set and wouldn't benefit frm further abstraction...

I used a strategy for the exchange.

For the Employee-boss-engineer question I wasn't too sure whether they were looking for the pattern to implement the Employee-boss-engineer relationship, or a pattern to implement the best solution for calculating the leave. I said in the end it is a strategy pattern and explained that I am using this pattern to cater for the different ways of calculating the leave.

For the exchange rate question I also said singleton. Guess both singleton and mono-state pattern could work here depending on how the system(s) is implemented.

Revenge Wrote:
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>
> For the exchange rate question I also said
> singleton. Guess both singleton and mono-state
> pattern could work here depending on how the
> system(s) is implemented.

The question wasn't very clear. I wasn't sure if they were talking about one application running on a server requiring one instance of the settings (singleton) or multiple separate applications that needed the same data (monostate?)?

i gues the employee boss question could have been understood in several ways , ie what pattern is used for their relationships to each other , thats why i thought composite.. or if they were refering rather to the pattern involving calculations then strategy would make sense...

for the exchange rate also can me seen in more than one way, i saw it as what pattern can any user use and make the exchange rate be seemless to them getting a price, thats why i thought the adaptor would work to ffaciliate any exchange rate being applied but only with one function call passing the echange code "$" or "pound sign".. i don't understand how the singlton could be applied though?

iva Wrote:
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> what about the one where you ahve to say why the
> equivclass did not use a typedef? i had no idea .
> i thought later maybe because already equivclass
> is a set and wouldn't benefit frm further
> abstraction...

Wasn't sure about this either. I wrote that by defining EquivClass you don't have to refer to Set<QString*> everywhere and that it will allow you to easily change the underlying collection at a later stage without changing all the code.

iva Wrote:
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>
> for the exchange rate also can me seen in more
> than one way, i saw it as what pattern can any
> user use and make the exchange rate be seemless to
> them getting a price, thats why i thought the
> adaptor would work to ffaciliate any exchange rate
> being applied but only with one function call
> passing the echange code "$" or "pound sign".. i
> don't understand how the singlton could be applied
> though?

The singleton only makes sense if they all share the same application and want to ensure that all the departments refer to the same currency tables. But then again, I won't put money on that being right.

1) What the hell was the Containers they asked about? They way they asked the question I did not think it was the Value containers like QSet, QMap etc.

2) On the Employee boss question, I wanted to use the Composite, but the fact that the classes ibterfaces differ threw me a bit. I opted for the Visitor pattern, one class for visiting each object and one for processsing the vacation days.. am I completely off track?

Furthermore I cannot believe that I'm the only one who found this exam difficult and questions completely vague. This whole subject has been a farce since the start.

I'm going to write a letter to the lectures discussing the vaious problems that I've experienced doing this module.

If Anyone wants to add their 2 cents, please mail me at : mwolvaardt@mweb.co.za

Regards,

Marnus.

If anyone's writing letters, may i suggest the Head of Department?

I agree, go straight to the top, but will CC the lecturers as well.

mwolvaardt Wrote:
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> 1) What the hell was the Containers they asked
> about? They way they asked the question I did not
> think it was the Value containers like QSet, QMap
> etc.
>
i think they wanted containers of code i answered namespaces, packages and dlls but dunno if they are right , i think it came from chapter 7 on libraries

iva Wrote:
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> mwolvaardt Wrote:
> --------------------------------------------------
> -----
> > 1) What the hell was the Containers they asked
> > about? They way they asked the question I did
> not
> > think it was the Value containers like QSet,
> QMap
> > etc.
> >
> i think they wanted containers of code i answered
> namespaces, packages and dlls but dunno if they
> are right , i think it came from chapter 7 on
> libraries

You're right, it's from chapter 7.

libs - dll
objects - .o
source files - .cpp
etc.

Stupid question for a 3rd year subject!

boss-engineer - composite
exchange - I used monostate, but also said that singleton would be more appropriate, giving examples of both

I also used monostate for that exchange one.
I can't believe they asked that one about the library, how you would install it I think, luckily I looked at it, but why ask it???

The coding one, I had no idea how much to write, because it seemed like quite a bit to change for the first one, but only 3 marks?

Silly to say the least!

But it was a bit easier than expected