Kubsyy
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Good morning/afternoon/evening everyone!

Since SQA exams are finished and it’s being marked simultaneously checked correctly, I wanted to start a thread for Higher Computing.

So how you guys feel towards higher computing?, will it be easy or hard?.

Update: Welp, I found out that I will have the same teacher who doesn’t teach yet again!. Time to go through hell again by revising from textbooks😡.
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nat5dawg
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Afternoon

Just thought I'd drop some links to websites that really helped me revise for Higher Comp Sci this year:
- Great revision notes: https://sites.google.com/rgc.aberdee...ome?authuser=0
- All the prelim papers (bar 2019): https://blogs.glowscotland.org.uk/nl...uting-science/

Of course, the course content may change (again) this year - who knows - but the basis of it should be the same. For example, the majority of the content in all the past papers (2015-2018) was actually not included in the course for 2019, but a good few questions were still absolutely relevant.

My advice to those taking it this year is to focus mainly on the specimen paper (usually released in September) and also on the course specification. I really do stress reading and understanding the content in the course spec, because for numerous questions in the exam this year - they could be answered by just memorizing parts of the course spec (eg F/E cycle or intelligent systems). It's all about memorizing the theory and understanding the harder parts such as programming/web dev.

comp sci is hands down the best subject (not up for debate...) and higher, while it is naturally more difficult, is so much more fun than nat 5. enjoyyy
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Kubsyy
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Thank you!, it will be useful when I will have study
(Original post by nat5dawg)
Afternoon

Just thought I'd drop some links to websites that really helped me revise for Higher Comp Sci this year:
- Great revision notes: https://sites.google.com/rgc.aberdee...ome?authuser=0
- All the prelim papers (bar 2019): https://blogs.glowscotland.org.uk/nl...uting-science/

Of course, the course content may change (again) this year - who knows - but the basis of it should be the same. For example, the majority of the content in all the past papers (2015-2018) was actually not included in the course for 2019, but a good few questions were still absolutely relevant.

My advice to those taking it this year is to focus mainly on the specimen paper (usually released in September) and also on the course specification. I really do stress reading and understanding the content in the course spec, because for numerous questions in the exam this year - they could be answered by just memorizing parts of the course spec (eg F/E cycle or intelligent systems). It's all about memorizing the theory and understanding the harder parts such as programming/web dev.

comp sci is hands down the best subject (not up for debate...) and higher, while it is naturally more difficult, is so much more fun than nat 5. enjoyyy
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Strelzo
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Higher Computing is going to be great; we have completed SUB Routines and Paramater passing for software development and so far it's been very easy. The thing that is weird is that our class consists of National 4, National 5 and Higher students lol. The main focus is obviously that of the Higher student's interests, but it just seems insane that there are 3 different levels of qualifications that are being sat to be achieved inside the one class.
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Kubsyy
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Oh lol, I do not know how my class will be because I will have tomorrow but one of my friends talked to the teacher and he said that there will be 2-3 highers (me and my friend I’m presuming) and the rest will be national 5 which is really funny. But I really hope that I pass nat 5 and do higher to do a year of hell again ahaha. But I’m glad that you’re enjoying already
(Original post by Strelzo)
Higher Computing is going to be great; we have completed SUB Routines and Paramater passing for software development and so far it's been very easy. The thing that is weird is that our class consists of National 4, National 5 and Higher students lol. The main focus is obviously that of the Higher student's interests, but it just seems insane that there are 3 different levels of qualifications that are being sat to be achieved inside the one class.
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Kubsyy
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Hello guys, does anybody know websites, links etc that provide programming tasks appropriate for higher computing?. I was searching through websites when I had computing and I couldnt find any. I have ordered bright red’s higher computing book but Im afraid that they might not have programming tasks to do. I would be really, really greatful if anybody knows if there is anything with those tasks.
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nat5dawg
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(Original post by Kubsyy)
Hello guys, does anybody know websites, links etc that provide programming tasks appropriate for higher computing?. I was searching through websites when I had computing and I couldnt find any. I have ordered bright red’s higher computing book but Im afraid that they might not have programming tasks to do. I would be really, really greatful if anybody knows if there is anything with those tasks.
Unfortunately this was something I never really managed to find. Your best bet is to have a look at past coursework papers (my phone is being annoying so I can't link them but google should find them) and do what you can with them. Hope that helps a bit
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Strelzo
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(Original post by Kubsyy)
Hello guys, does anybody know websites, links etc that provide programming tasks appropriate for higher computing?. I was searching through websites when I had computing and I couldnt find any. I have ordered bright red’s higher computing book but Im afraid that they might not have programming tasks to do. I would be really, really greatful if anybody knows if there is anything with those tasks.
I could give you problems from the ones we were doing in class if you want?
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Kubsyy
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(Original post by Strelzo)
I could give you problems from the ones we were doing in class if you want?
That would be really good if you can.
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Kubsyy
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(Original post by nat5dawg)
Unfortunately this was something I never really managed to find. Your best bet is to have a look at past coursework papers (my phone is being annoying so I can't link them but google should find them) and do what you can with them. Hope that helps a bit
Yeah I’m aware of that, which is stupid but oh well. I would do a coursework practice but that would be complex for me because I don’t understand programming constructs and algorithms for higher yet, so I just want easy tasks that gets me started. But thanks.
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winterscoming
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(Original post by Kubsyy)
Hello guys, does anybody know websites, links etc that provide programming tasks appropriate for higher computing?. I was searching through websites when I had computing and I couldnt find any. I have ordered bright red’s higher computing book but Im afraid that they might not have programming tasks to do. I would be really, really greatful if anybody knows if there is anything with those tasks.
Different exam board, but there's a good list of programming challenges to try to practise with here:
https://www.ocr.org.uk/Images/260930...es-booklet.pdf

Project Euler has some good practise problems too: https://projecteuler.net/archives
Hackerrank also has some good tasks for programming practise: https://www.hackerrank.com/dashboard
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Kubsyy
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Hello guys, I want to ask, how would I solve this and convert any denary to binary to 16 bit twos complement?Name:  F5F6A132-E2A8-4C9B-BFBA-E64E6CDE4F9F.jpg.jpeg
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Strelzo
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(Original post by Kubsyy)
Hello guys, I want to ask, how would I solve this and convert any denary to binary to 16 bit twos complement?Name:  F5F6A132-E2A8-4C9B-BFBA-E64E6CDE4F9F.jpg.jpeg
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Sadly I'm unable to help you at the moment because we are still doing software development.
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Kubsyy
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(Original post by Strelzo)
Sadly I'm unable to help you at the moment because we are still doing software development.
That’s fine, I have the higher book but it didn’t really tell how to do this only with 8 bits (I guess it’s the same with 16 bit and two complement?) but I’ll look at it later. Enjoy your summer holidays and I wish you luck with exam results 😁
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nat5dawg
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(Original post by Kubsyy)
Hello guys, I want to ask, how would I solve this and convert any denary to binary to 16 bit twos complement?Name:  F5F6A132-E2A8-4C9B-BFBA-E64E6CDE4F9F.jpg.jpeg
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You'll need a calculator!

It's practically the same as solving 8 bit twos complement. First invert the 0s and 1s, add one, then just add the numbers where there is a one

When you get the 9th number from the left, all you do there is see what 2^8 is. Eg the first number was 2^0 which = 1, then 2^1 = 2 and so on.

I'm kinda bad at explaining so apologies - but it's basically just 8 bit twos with that 2^8 added on in this case.
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Strelzo
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(Original post by Kubsyy)
That’s fine, I have the higher book but it didn’t really tell how to do this only with 8 bits (I guess it’s the same with 16 bit and two complement?) but I’ll look at it later. Enjoy your summer holidays and I wish you luck with exam results 😁
Same to you :gah:
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Phi.re0
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(Original post by Kubsyy)
Hello guys, I want to ask, how would I solve this and convert any denary to binary to 16 bit twos complement?Name:  F5F6A132-E2A8-4C9B-BFBA-E64E6CDE4F9F.jpg.jpeg
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You start off with the following 16 bit two's complement number:
1111 1110 1110 1011

Then you perform two's complement on this number, the steps are as follows:
1. Flip the bits (1 becomes 0, 0 becomes 1)
2. Add 1 to the number

Here is this in action:
Starting Number: 1111 1110 1110 1011
Flipped Number: 0000 0001 0001 0100
Add 1 to flipped: 0000 0001 0001 0101

You then have the number: 0000 0001 0001 0101
You can make it easier by stripping all of the zeros on the left before the one so you have: 1 0001 0101

If you put this under the following headings then you can get the value:
256 128 64 32 16 8 4 2 1
1 0 0 0 1 0 1 0 1

You add it up:
256 + 16 + 4 + 1 = 277

and because the sign bit of the binary number is a 1 (indicating the number is negative), the answer is -277

This may help: https://www.bbc.com/bitesize/guides/zsnbr82/revision/3
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Kubsyy
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Hello. I know it’s early to ask a question from a past paper but I checked my higher computing book but it barely talks about floating point stuff and also I could make a note of it.

The question is from 2019:

Name:  A6C8D1F8-1715-4AD2-A467-E43D1E10361B.jpg.jpeg
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nat5dawg
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(Original post by Kubsyy)
Hello. I know it’s early to ask a question from a past paper but I checked my higher computing book but it barely talks about floating point stuff and also I could make a note of it.

The question is from 2019:

Name:  A6C8D1F8-1715-4AD2-A467-E43D1E10361B.jpg.jpeg
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Hi,

Essentially there are three steps:
1. Is the number positive or negative? Positive, then the sign bit = 0. Negative and the sign bit is 1.

2. What is the mantissa? We find this by moving the decimal point to a position where the binary number starts with 0. - In this case we find out mantissa by moving the decimal 3 places to the left to then get 0.110001, so from that our mantissa is just 110001. However, you wouldn't write it like this in this example. Note how is asks for 16 bits to be allocated to the mantissa? This means we must add trailing 0's to the number we just found above (110001) to get a final answer. Please note the sign bit is included in the mantissa bit count! So basically, the final mantissa is just 110001 000000000 (without the sign bit).

3. Finally - lets find the exponent. Now, remember you noted that number earlier (3)? This is when we use that. As we moved the decimal 3 places to the left, the 3 is positive (if it happened to move X amount to the right, X would be negative and you would simply use two's complement).
Lastly, as it asked for 8 bits to be allocated to the exponent - all you do is use your Nat5 skills to convert 3 into 8 bit binary. You should get something like 00000011.

Hope that helped a bit, not done this since May but this is what I remember.
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agirlcalledtheo
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(Original post by nat5dawg)
Afternoon

Just thought I'd drop some links to websites that really helped me revise for Higher Comp Sci this year:
- Great revision notes: https://sites.google.com/rgc.aberdee...ome?authuser=0
- All the prelim papers (bar 2019): https://blogs.glowscotland.org.uk/nl...uting-science/

Of course, the course content may change (again) this year - who knows - but the basis of it should be the same. For example, the majority of the content in all the past papers (2015-2018) was actually not included in the course for 2019, but a good few questions were still absolutely relevant.

My advice to those taking it this year is to focus mainly on the specimen paper (usually released in September) and also on the course specification. I really do stress reading and understanding the content in the course spec, because for numerous questions in the exam this year - they could be answered by just memorizing parts of the course spec (eg F/E cycle or intelligent systems). It's all about memorizing the theory and understanding the harder parts such as programming/web dev.

comp sci is hands down the best subject (not up for debate...) and higher, while it is naturally more difficult, is so much more fun than nat 5. enjoyyy
Genuinely Thank you so much for this. I agree Computing is my favourite subject and I really want to get an A this year and get accepted of computing in uni
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