OCR A2 Computing F453 Official Thread 22/06/2016 Exam Discussion

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Reply 360

jackpcraig

Original post by Aydin7

I did the same

customer-----<-order-----<-item
single customer can place many orders and orders may have many items

That's exactly what my diagram was, yay.

Reply 361

username2460773

Original post by jackpcraig

That's exactly what my diagram was, yay.

we got it right m8 :wink:

Reply 362

John323

Surely if an item has many orders though it is assumed that that item can be ordered in many different orders so should be many to many or have a linking entity...

Reply 363

ryanroks1

Original post by Aydin7

I did the same

customer-----<-order-----<-item
single customer can place many orders and orders may have many items

Got this too - although admittedly I feel OCR should have phrased the question better!

Reply 364

AKC...

Original post by John323

Surely if an item has many orders though it is assumed that that item can be ordered in many different orders so should be many to many or have a linking entity...

You'd assume that, but it didn't state that it's many to many. If you're on ebay, each item can only be sold once, I guess the shop must have a similar format.

Reply 365

AKC...

Also the the question explicitly said 3 tables, so I'd imagine that you couldn't have a many to many relationship.

Reply 366

John323

Original post by AKC...

Also the the question explicitly said 3 tables, so I'd imagine that you couldn't have a many to many relationship.

It didnt say the table was in 3rd Normal form though

Reply 367

username2460773

Original post by John323

It didnt say the table was in 3rd Normal form though

Because then it gives you the answer, it specified 3 tables and the way they're connected.

Reply 368

John323

Ok so it specified the product can only be ordered once? Im guessing what they might do is give the 3 marks for the lines which they said to draw and leave the last 1 to assumption

Reply 369

Alfie90

Original post by Aydin7

I did the same

customer-----<-order-----<-item
single customer can place many orders and orders may have many items

I also did thatm does anyone actually know the correct answer?

Reply 370

username1831327

Original post by Alfie90

I also did thatm does anyone actually know the correct answer?

I thought it should be many to many from the context but because it said at the end that an order can have many items I just put a one to many

Reply 371

AKC...

So what marks does everyone think they may have got?

53/100 for A in F452

Original post by MrSplash

53/100 for A in F452

Yeah I am surprised at how low it is.

Reply 374

username2460773

Compared to last year, F451 increased by 8 marks for an A and F452 decreased by 13 marks.
All my other exams are mostly +/-1 on last year, what the **** are OCR doing? Expected the increase/decrease, but not by such a margin.

Reply 375

MrSplash

Original post by jackpcraig

Yeah I am surprised at how low it is.

I think that 8 marker has alot to do with it tbh.

Reply 376

ryanroks1

F454 as consistent as ever though - bet it's because everyone uses the exemplar material! Just hope I haven't been moderated down for something stupid..

Reply 377

dj3k

How much has the F453 paper changed by? Also does anyone have the F453 paper and MS? Thanks

Reply 378

Fox Corner

Hi everyone

Happy results day! How did Computing go for you?

Congrats to everyone on finishing their exams - you did amazing for getting through them no matter what grade you got