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AQA COMP3 June 2012 Exam Thread

Reply 480

drumdrum

Original post by ldvico

I went for file management, processor scheduling and I/O management

I did Processor Management, Memory Management and File management.

Reply 481

FredrickTrott

6

For the Mantissa question i sneakily wrote all my answers onto my ruler, so here they are from what i can read of it :

-44

largest Negative Number

1.000000 01111

416 =
0.110100 01001

-12.5 =
1.001110 00100

Aah i copied this down wrong, i've changed it now

The other type of complexity that isn't time complexity is Space Complexity (Cant remember which question)

Q2a)

Form was Backus Naur Form (BNF)

Question 2b)

The decimal number was No (Wouldnt be accepted by the BNF)
The whole number was Yes

One of the Last Questions

The tree will have a loop if the maze has more than 1 distinct solution

Halting Problem Question

Create Program, Without executing it

This is all i remember, the rest was generally wordy/SQL questions

(edited 11 years ago)

Reply 482

ldvico

At FredrickTrott, I got all those answers. I accidently wrote Backus-Naur Notation instead though LOL

Reply 483

adam925

Can anyone confirm if it was digital certificates or signatures? I was 100% sure i read certificates, could be wrong though :frown:

Reply 484

ldvico

Original post by adam925

Can anyone confirm if it was digital certificates or signatures? I was 100% sure i read certificates, could be wrong though :frown:

I do re-call it asking how signatures were generated. I don't remember reading certificates :s-smilie:

Reply 485

adam925

Original post by ldvico

I do re-call it asking how signatures were generated. I don't remember reading certificates :s-smilie:

Coming to think of it i think it was :/ I beasted it about certificates..however probs wouldn't get many marks considering it was about a different thing lol.

Reply 486

steve ex

Original post by adam925

Can anyone confirm if it was digital certificates or signatures? I was 100% sure i read certificates, could be wrong though :frown:

It was definitly signatures. I had to go back and change all of my spellings of it because I kept spelling it signitures. :smile:

Reply 487

drspa44

1

Those hand-tracing questions were annoying. I only half filled the first table and the final table was very difficult to follow. The problem with these questions is that you never know when you're supposed to drop to a new row.

For the database question, I wrote to allow multiple copies:
Create BookCopies(BookCopyID,BookID) and replace BookID with BookCopyID in Loans

For the halting problem I put: 'create an algorithm' and (without) 'knowing the outputs'. This is probably partially or completely wrong. I said it was significant: 'Alan Turing proved the answer to the question above to be false. It is an undecidable problem.'. Everything else seemed okay though.

Reply 488

bian101

I read signatures as i had to make sure i spelled it correctly, spelling is awful.

Also, i hated that exam... Hated it :frown:

stuff came up we havent learned!

(edited 11 years ago)

Reply 489

SoulReaper1470

5

Original post by drumdrum

I did Processor Management, Memory Management and File management.

I didn't write management after any of them, I thought that was assumed. Wonder if they'll accept it :P

Reply 490

AviationVortex

4

Original post by drumdrum

I put a^n

yeah, so did I cuz it was a nested loop of 1 to N twice, so if n is 2 loops run 4 times, 3 and 9, 4 and 16, etc

Reply 491

mfmdanny

Original post by FredrickTrott

For the error mantissa question, i got overflow, underflow, overflow, but apperently the last one was rounding, would overflow still e correct?

I put overflow, underflow and precision error

Reply 492

pjjppj

Original post by AviationVortex

yeah, so did I cuz it was a nested loop of 1 to N twice, so if n is 2 loops run 4 times, 3 and 9, 4 and 16, etc

Thats n^2

Reply 493

steve ex

Think I completely messed up the hashing part, but otherwise was a good exam.

Reply 494

AviationVortex

4

Original post by mfmdanny

i put overflow, underflow and precision error

yayyyy, so did i...

Reply 495

AviationVortex

4

Original post by pjjppj

Thats n^2

Yeah, the point I was making LOL.. It was O(n^2)

Reply 496

foolscap

9

Original post by mfmdanny

I put overflow, underflow and precision error

yesss i put the same as well, quite happy with that exam.

Reply 497

mfmdanny

Original post by FredrickTrott

For the Mantissa question i sneakily wrote all my answers onto my ruler, so here they are from what i can read of it :

-44

largest Negative Number

1.000000 01111

416 =
0.110100 01001

-12.5 =
1.10011 00101

I think the -12.5 is wrong. Didn't it ask for normalised floating point? So the first 2 bits must be 1.0 or 0.1

Also, did it say "the largest negative number"?
I thought it said "the most negative number," I was like... Huh?

Reply 498

foolscap

9

Original post by mfmdanny

Also, did it say "the largest negative number"?
I thought it said "the most negative number," I was like... Huh?

yeah it said "the most negative number" is was like, wtf that's stupid.

Reply 499

ms607

2

Original post by mfmdanny

I think the -12.5 is wrong. Didn't it ask for normalised floating point? So the first 2 bits must be 1.0 or 0.1

Also, did it say "the largest negative number"?
I thought it said "the most negative number," I was like... Huh?

yeah they mean the same thing?

in which case I got that wrong as I think I put the smallest -ve number :frown:

AQA COMP3 June 2012 Exam Thread

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