Question 23: Exam Thoughts (2 Viewers)

[Ragerunner]

Post your thoughts here.

 

[JRasnier]

pretty straight forward, but expect ppl to not notice that the questions are referring to 'After execution'

 

[Ragerunner]

Yeah that machine language code kinda scared me there.

I made up some logical answers that im not sure are right but oh well

 

[-X-]

hmm i didn't notice the After exectution...but how would that have affected any one? Also what did ppl put as the accumulator?

For the last part i wrote:
--------
Load(Reg1, Mem5)
Load(Reg2, Mem5)
ADD(Reg3, Reg1, Reg2)
ADD(Reg1, Reg2, Reg3)
STORE(Reg1, Mem7)

lol hope i got it right.

 

[saves.the.day]

Originally posted by -X-
hmm i didn't notice the After exectution...but how would that have affected any one? Also what did ppl put as the accumulator?

For the last part i wrote:
--------
Load(Reg1, Mem5)
Load(Reg2, Mem5)
ADD(Reg3, Reg1, Reg2)
ADD(Reg1, Reg2, Reg3)
STORE(Reg1, Mem7)

lol hope i got it right.

EXACTLY WHAT I WROTE.. heheheh cool. I hope we both get full marks for that

 

[Jinglebell]

are those of us that do the evolution option meant to know hexadecimal etc? cos i remember doing it in yr11 at some point, but haven't looked at it since...and hence some of this question really screwed me over.

 

[-X-]

GREAT!! lol at first i wasnt sure so i wrote Multiply(blah,blah) then i got back to it at the end and fixed it. Knowing a little bit of assembly helps.

 

[new1]

-X- same as you bro ('cept used diff regs)

took me ages to figure out wtf was going on, but wen i did, was all good

answer to ii was 30 + A1
answer to iii was decimal version of ii

???

 

[Fiona]

I ended up doing the conversion "my own way" (hahaha well...) and ended up with something like 117... I can't remember exactly. It was over 100 anyway.

Hmm... Any ideas, someone who actually knows how to do the conversion?

 

[Fiona]

http://www.jaworski.com/htmlbook/dec-hex.htm - hexadecimal conversion table...

So...

31(hex) = 49(dec)
A1(hex) = 161(dec)

therefore... the answer should have been 210.

Oops

 

[JRasnier]

i converted it to binary then added them together....then converted it back

 

[squ34ki]

i still don't get the hexadevimal

that question...

 

[squ34ki]

that was the one which stumped me
btw, is it in the syllabus?

 

[JRasnier]

i think i got that as the answer....

 

[Fiona]

According to the syllabus, "Students learn about"

Data types
blah blah blah
integer representation in binary,
decimal, octal and hexadecimal

But that's learn about, not do conversions...

And if you did the developers perspective of hardware or whatever it is...

Representation of data within the
computer
character representation, namely:
ASCII
hexadecimal


So I say, damn you examination setter people! Pfft!

 

[squ34ki]

well i did evolution,
but it was just 2 and 2 marks...

 

[-X-]

A1
= 16^0 * 1 + 16^1 * 10
=161

31
= 16 ^ 0 * 1 + 16^1 * 3
= 49

Those who do H/ware option topic would have an advantage here. But they shouldnt ask this directly cause as far as i know this was not in the syllabus!!

 

[saves.the.day]

hmm I do software developers view of hardware so I knew how to do the conversions without too much worry..

However, I did think it was unfair to test this as it gave the people doing that option topic the unfair advantage.

But just remember people, the BOS does reserve the right to test candidates on 15% (or I think it was 10%) off the content from the preliminary course. I got this from my math teacher who told me to revise locus even though its a yr 11 topic and she fed me that line I typed above and said it also applied to all my other subjects. My economics teacher said the same, saying I should revise elasticity of prices.. so yeh.

 

[squ34ki]

reli!
that's crazy, coz i didn't touch my year 9 stuff since last year!!

talk about unfairness!!

 

[Beaky]

What did everyone put for Question 23 b) i)

I thought this was a great question cause I love linux and everything associated with the public domain... I put

HARDWARE
- Modems and Cable Modems allow connection to internet so people can collobarate ideas from different locations... blah
- Storage methods have changed so code can be transported (e.g Thumb Drive) more easily
SOFTWARE
- Change in software approach of machine dependant code allowing for multi-platforms so more users can contribute to open source and use it... e.g Java
- Introduction of File SHaring, Chat programs such as mIRC so people can get together and discuss software upgrades