You are Here: Home

# WJEC A2 Computing CG3 - Tuesday 23rd June 2015 [Exam Discussion Thread] watch

Announcements
1. (Original post by CD223)

Posted from TSR Mobile
Probably CASE tools. I can never remember all of them
2. (Original post by unknown192)
Probably CASE tools. I can never remember all of them
I don't like application generators. I never remember them

Posted from TSR Mobile
3. (Original post by CD223)
I don't like application generators. I never remember them

Posted from TSR Mobile
Hopefully they won't come up as the last question
4. Stomach full from buffet. Cookies reading for crazy sugar overdose before exam. Lets do this.
5. (Original post by unknown192)
Hopefully they won't come up as the last question
Hoping for a compilation process question.

Posted from TSR Mobile
6. (Original post by 8472)
Stomach full from buffet. Cookies reading for crazy sugar overdose before exam. Lets do this.
Haha! Are you going to that revision session tomorrow?

Posted from TSR Mobile

7. Can you explain the process of the algorithm and how to use the recursive algorithm?

I always get so confused. I mean the dry run of it, thanks
8. (Original post by CD223)
Haha! Are you going to that revision session tomorrow?

Good question.

It may be best for me and i'd like to but a couple other bits and bobs for me to sort out tomorrow sadly so can't make it. We totally should have setup a college thread on TSR and had huge multiple class discussions.
9. (Original post by actanide)

Can you explain the process of the algorithm and how to use the recursive algorithm?

I always get so confused. I mean the dry run of it, thanks
19.
The algorithm is a recursive algorithm. Recursive algorithms are a special type of algorithm. The key features of any recursive algorithm is that is must call itself and and must also have a terminating condition or a base case which terminates the recursive calling of the function.

From the example given, the function calls itself when the line "set Fvalue = Fvalue(num-1) + Fvalue(num -2)" is performed if the value of the parameter "num" is greater than 2.

The function has the terminating condition where num = 1 or num = 2, when Fvalue is set to 0 and 1 respectively. The algorithm terminates when num takes either of these two values.

20.
The calculation performed is the Fibonacci calculation of the nth number in the Fibonacci sequence, where Num = n. Each consecutive number in the Fibonacci sequence is the result of the sum of the previous two numbers in the sequence.

If Num=4 is used:

Fvalue(4) = Fvalue(2) + Fvalue(3)

So:
Fvalue(4) = Fvalue(2) + Fvalue(2) + Fvalue(1)

Meaning:
Fvalue(4) = 1 + 1 + 0

So:
Fvalue(4) = 2

Does that help?

Posted from TSR Mobile
10. (Original post by CD223)
19.
The algorithm is a recursive algorithm. Recursive algorithms are a special type of algorithm. The key features of any recursive algorithm is that is must call itself and and must also have a terminating condition or a base case which terminates the recursive calling of the function.

From the example given, the function calls itself when the line "set Fvalue = Fvalue(num-1) + Fvalue(num -2)" is performed if the value of the parameter "num" is greater than 2.

The function has the terminating condition where num = 1 or num = 2, when Fvalue is set to 0 and 1 respectively. The algorithm terminates when num takes either of these two values.

20.
The calculation performed is the Fibonacci calculation of the nth number in the Fibonacci sequence, where Num = n. Each consecutive number in the Fibonacci sequence is the result of the sum of the previous two numbers in the sequence.

If Num=4 is used:

Fvalue(4) = Fvalue(2) + Fvalue(3)

So:
Fvalue(4) = Fvalue(2) + Fvalue(2) + Fvalue(1)

Meaning:
Fvalue(4) = 1 + 1 + 0

So:
Fvalue(4) = 2

Does that help?

Posted from TSR Mobile

Oh my, thats so confusing haha,but I get it now! Thank you
11. (Original post by actanide)
Oh my, thats so confusing haha,but I get it now! Thank you
No problem recursion is an odd topic to get your head around aha.

Posted from TSR Mobile
12. (Original post by unknown192)
Probably CASE tools. I can never remember all of them
You just need to remember some of these points:

A CASE tool is a computer program/ piece of software used in the design or development of a computer application.

• (provides a number of functions which) assist with design / testing, etc.
• provides a data dictionary
• includes a graphics / diagram production feature
• may include a code generator
• may provide repositories of reusable code
• may provide project management tool(s)
• may incorporate version control
• may carry out report generation
• may include prototyping tool accepted but not expected

from the summer 2010 Q10 Mark scheme
13. (Original post by jt663)
You just need to remember some of these points:

A CASE tool is a computer program/ piece of software used in the design or development of a computer application.

• (provides a number of functions which) assist with design / testing, etc.
• provides a data dictionary
• includes a graphics / diagram production feature
• may include a code generator
• may provide repositories of reusable code
• may provide project management tool(s)
• may incorporate version control
• may carry out report generation
• may include prototyping tool accepted but not expected

from the summer 2010 Q10 Mark scheme
It's also worth extending points with examples.

Posted from TSR Mobile
14. (Original post by CD223)
It's also worth extending points with examples.

Posted from TSR Mobile
Yeah, they often give marks for them when they don't ask. Mark scheme is very weird. They give marks for stuff they don't ask for and you could put something correct and get no marks for it if its not what they wanted you to say.
15. (Original post by jt663)
You just need to remember some of these points:

A CASE tool is a computer program/ piece of software used in the design or development of a computer application.

• (provides a number of functions which) assist with design / testing, etc.
• provides a data dictionary
• includes a graphics / diagram production feature
• may include a code generator
• may provide repositories of reusable code
• may provide project management tool(s)
• may incorporate version control
• may carry out report generation
• may include prototyping tool accepted but not expected

from the summer 2010 Q10 Mark scheme
It's much easier to revise from in that format. Thank you
16. (Original post by jt663)
Yeah, they often give marks for them when they don't ask. Mark scheme is very weird. They give marks for stuff they don't ask for and you could put something correct and get no marks for it if its not what they wanted you to say.
I personally hate the way it's examined. It makes no sense. Sometimes a 1 mark question requires two underlined phrases just for a single mark and other times they don't care!

Posted from TSR Mobile
17. (Original post by CD223)
I personally hate the way it's examined. It makes no sense. Sometimes a 1 mark question requires two underlined phrases just for a single mark and other times they don't care!

Posted from TSR Mobile
Yeah i think we all hate it! The only advice i would give is use as much technical terminology as possible, sometimes the marks are only given if certain words are used
Always use examples, even if they dont ask
and always write something even if it seems somewhat irrelevant - there is a chance you could pick up marks, and as far as i understand the only time you can get marks deducted for being wrong is for putting too many forgien keys in the 3rd normal form database design question!
18. (Original post by CD223)
I personally hate the way it's examined. It makes no sense. Sometimes a 1 mark question requires two underlined phrases just for a single mark and other times they don't care!

Posted from TSR Mobile
Yeah, they set it up to be easy to mark I think. Best thing to do is just to right as much as you know about what they're asking about unless they say 'give 2 points' and with 3 hours thats okay.
19. (Original post by CD223)
I personally hate the way it's examined. It makes no sense. Sometimes a 1 mark question requires two underlined phrases just for a single mark and other times they don't care!

Posted from TSR Mobile
The WJEC board is so ridiculous when it comes to marking; but they basically copy the same questions every year as well, which I cant complain about because all you have to do is learn the mark scheme
20. Does anybody know what the grade boundaries are to get an A/B? Thanks

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: December 12, 2015
Today on TSR

### Exam Jam 2018

All day biology and life sciences revision thread

### Solo - A Star Wars Story

Poll
Useful resources

Can you help? Study Help unanswered threadsStudy Help rules and posting guidelines

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE