AQA COMP2 7th June 2011 AM

Did anyone else notice the error in the question about buses/processors? The address bus didn't extend far enough. That really threw me.

Wasnt that comp1?

I was that bad at computing, I really can't remember

It is in the book. Page 215. Last paragraph for the data protections act info. If only i paid more attention to that paragraph

UUUrrrghhhhhhhhhhh just checked the book that is so fricking annoying, i feel lyk punching sum1....urrghhhh, wish I read that too!!!!

I got Not A, and checked through it. De Morgan's law was the method I chose...

That's the way I did it too.

Not(A.B) + Not(A.Not(B))
Not(A.B) = Not(A) + Not(B)
Not(A.Not(B)) = Not(A) + B

Not(A) + Not(A) + Not(B) + B
Not(A) + Not(B) + B
Not(A) + 1
1

I did most of this but ruined it near the end coz i put notB + B = 0 ;(

Never mind, you could still get 3/4 I reckon

What did people put for that question about what a 64 bit system that uses an address bus meant? (Sorry, can't really remember the exact question)

I put 'The computer can store 2^64 different address buses'.

What did people put for the question where you had to match each peripheral to the correct memory sizes?
Especially the one that had 512MB to 128GB?

I put Magnetic Hard Disk for the one that went up to 2 TB
I put USB Flash Drive for the one that went from 512MB to 128GB
I put Bluray Disc for the one that went from 4.7GB to 8 GB
I put CD-Rom for the one that went from 600MB to 700MB

Who agrees with me on this one?

What did people for the question about why a software is bought on CD rather than bought.
I put 'Software bought on CD is portable and can be used again and again. It can also save Hard Disc Space. Whereas software that is downloaded takes up more memory space and takes longer to obtain software'.

What did people put for that question about what a 64 bit system that uses an address bus meant? (Sorry, can't really remember the exact question)

I put 'The computer can store 2^64 different address buses'.

What did people put for the question where you had to match each peripheral to the correct memory sizes?
Especially the one that had 512MB to 128GB?

I put Magnetic Hard Disk for the one that went up to 2 TB
I put USB Flash Drive for the one that went from 512MB to 128GB
I put Bluray Disc for the one that went from 4.7GB to 8 GB
I put CD-Rom for the one that went from 600MB to 700MB

Who agrees with me on this one?

What did people for the question about why a software is bought on CD rather than bought.
I put 'Software bought on CD is portable and can be used again and again. It can also save Hard Disc Space. Whereas software that is downloaded takes up more memory space and takes longer to obtain software'.

What did people put for the question where you had to match each peripheral to the correct memory sizes?
Especially the one that had 512MB to 128GB?

I put Magnetic Hard Disk for the one that went up to 2 TB
I put USB Flash Drive for the one that went from 512MB to 128GB
I put Bluray Disc for the one that went from 4.7GB to 8 GB
I put CD-Rom for the one that went from 600MB to 700MB

Who agrees with me on this one?

What did people for the question about why a software is bought on CD rather than bought.
I put 'Software bought on CD is portable and can be used again and again. It can also save Hard Disc Space. Whereas software that is downloaded takes up more memory space and takes longer to obtain software'.

for my money, flash card was the only one that made sense for 512MB to 128GB. hard disk could clearly be bigger than that, dvd r is the 4.7 to 8.5 gig, (8.5 is dual layer). blu ray was the red herring.

re. the component diagram, i'd say the bus was control bus and the little component was the clock, tied to the CPU by the control bus. I emailed AQA about the error in the diagram too.

Sorry, but was there an error on that component diagram?

If so does that mean free marks

there was an error. the solid line bus was connected to the dashed line bus on the bottom left component. the solid line should have carried on through the dashed line to meet up with the rest of the solid lines.

what that means to marks, i don't know.

Word processor: General purpose
Payroll software: Bespoke
Flight sim (? dunno if it was that): Special purpose

Types of software:

Operating systems
Compiler/Assembler
Backup software (any utility software)

URL parts:

HTTP - the protocol used, hypertext transfer protocol
www - World Wide Web (don't think you need any more detail than that)
end bit: File directory and the file to be opened.

Hardware components:

VDU Controller was in the row of 3 inside.
Processor was 5 I think, outside at the top
Main memory below it
Data bus

Truth table:

Think it NAND and NOR


Logic circuit:


Boolean algebra: ' represents NOT

(A.B)' + (A.B')'
= A' + B' + A' + B
= A' + 1
= 1


8 marker: not gonna write it all out, just google tcp/ip stack

HTML:


<html>
<head>
<title> Lectures 2011 (whatever was in the bar at the top)</title>
</head>

<body>
<h1 align="center">Lectures... blah blah</h1>
<br />
<ul> 'NOT <OL>
<li>Lecture 1</li>
<li>Lecture 2</li>
<li>Lecture 3</li>
</ul>

<p><i>Blah blah italic text</i><p>
<p>Blah blah <b>BOLD WORD</b> blah blah </p>

</body>
</html>


Data protection:
Information commissioners office
i) no. not relating to a person.
ii) yes, relating to living identifiable people.

Last q: Regulation of investigatory powers act

MIND HAS GONE BLANK ON THE REST OF THE Q'S! IF YOU CAN REMEMBER PLEASE TELL ME AND I'LL ADD ANSWERS. ALSO PLEASE TELL ME ANY ERRORS I'VE MADE.

Please don't quote the whole post by the way, just specifics if you can. Thanks

Hi,

I would more or less agree with most of your answers.

The only answers that vary with yours is the first one about 'Special Purpose Software', 'Bespoke Software' and 'General Purpose Software'.
I put...
Word processor: General Purpose
Payroll software: Special Purpose
Flight sim (? dunno if it was that): Bespoke Software

What did you put for the fetch execute cycle questions.
The one where we had to write down the names of the register that are used to...
(1)To store the instruction/address (Sorry, can't quite remember the wording of the question)
(2)To keep a copy of the data and instructions (Sorry, can't quite remember the wording of the question)
I put...
(1)Memory Address Register
(2)Memory Buffer Register
Would you agree with these?

What did you put for the question about the different generations of programming.
For the first question, I got 'Second Generation Programming Language'
For the second question, which was to give a suitable header for the row, I put 'Memory Address'
For the third question, which was to label X and Y (I think), I put...
'Opcode'
'Operand'
For the final question about the relationship between the two languages I put '1 to 1 mapping'.
Can you please tell me whether you agree with these.

Thanks for posting up your solutions to some of the questions