IGCSE Computer Science 2023-25 - (1) Data Representation - 1.3(a) data storage and compression
Вставка
- Опубліковано 2 сер 2024
- IGCSE Computer Science 2023-25 - (1) Data Representation - 1.3(a) data storage and compression
Computer Science Syllabus
Cambridge IGCSE™ (9-1 0984) (A*-C 0478)
For exams in 2023, 2024 and 2025.
VIDEO to support
TOPIC 1 : Data Representation and the first study area: data storage and compression - 1.3(a) Understand how data storage is measured. Calculate the file size of an image file and a sound file, using information given.
Cambridge IGCSE Computer Science helps learners develop an interest in computational thinking and an understanding of the principles of problem-solving using computers. They apply this understanding to create computer-based solutions to problems using algorithms and a high-level programming language. Learners also develop a range of technical skills, and the ability to effectively test and evaluate computing solutions.
Studying Cambridge IGCSE Computer Science helps learners appreciate current and emerging computing technologies, the benefits of their use and recognise their potential risks. It provides an ideal foundation for progression to Cambridge International AS & A Level and is valuable for other areas of study and everyday life.
If they give this, I’m dead. I need a calculator and they don’t even allow it
…unfortunately no calculator allowed :-(
This video series is a great help while preparing lessons for new syllabus.
You are surely a life saver.
Are these presentations available anywhere to download?
You are the best!
Dear Sir, You are a Life Saver and your videos are very clear and amazing. Further request you to please help us with syllabus on Paper 2 that is programming part as well..
I will try my best :-)
You good at explaining Bulmer 😊 these vids are really helpful
Thank you!! You're a life saver!!
Happy to help!
Genuine live saviour 😊❤
I am reading this book
In exam style question 3, why did you convert into Mibi bytes. It wasn't specified in the question
8:45 sir exactly now that is the problem for me they are saying no calculators allowed now and there are such big numbers. The test duration is 40 mins and they are giving this whole chapter including the numericals so it will take a long time to do numericals like this....is there any technique for easy method multiplication... I have the test tomorrow
Most of it is simple multiplication…just look out for what units they want the final answer in …BITS, BYTES, MEGABYTES etc…
Good luck…and don’t worry. It will be much easier than you think!
Thanks man i hope so
sir is there any easy method for the multiplication part
Sir, Please upload material on unit no.8 "Programming
Hello sir, great video. But I have one question, as calculators aren't allowed is there any method to divide such large numbers? Normal methods are extremely time consuming pls help.
A marvelous lecture ✨.
Sir I want to ask, at 11:43 you said the music being sampled has 2 channels. That's why we multiplied by 2.
So if it had 3 channels we would multiply it by 3?
And sir how did we know that the sound file was to be converted into MiB? Why not KiB or GiB?
Music is either stereo or mono …one or two channels
@@mrbulmerslearningzone aha I see. And sir why did we convert Q3 final answer into GiB
@@mazenzaheer4603 it's as per your wish converting in GiB will make the answer to go in decimals that's why we stopped at MiB
Prefer to convert the answer till the maximum unit but answer is to be in whole number
ty
my pleasure :-)
In example three, can you tell me why we converted into MiB bytes?
I'm really confused!
Hi Jimin...I could have left if it BITS or BYTES, but I think writing 5080320000 doesn't looks at neat.
@@mrbulmerslearningzone thank you sir for explaing
@@mrbulmerslearningzone thanks sir
Sir at 12:55 why are we converting the file size into MiB,when the question doesn't ask us to do so?
I just thought it was easier to read :-)
Sir, for 8:12 why do we need to times by 1024 3 times?
it is basicaly a way to make it into a larger unit,
sir if in 12:50 if there was 3 channels we would multiply it with 3 right? (in step 3)
also why we convert it into MiB 605?
3 channels?… it’s generally 1 channel for mono and 2 for stereo recordings
I just want to know whether I can use calculator or not
Nope its p1
No, a calculator isn't permitted for either paper
@@spiderus14 bro how calculate then
@@ompanylenovo7144 they expect us to use mental maths 😔 the calculations are usually easy tho, like 150 X 100 or 24000/8
Sir why do we divide the file size by 8?
8 bits in a byte
@@mrbulmerslearningzoneso do we divide by 8 every time when it come to this type of question?
@@Ym-._.-if you need to convert bits into something like a mebibyte or kibibytes, then yes, you need to change it into bytes first and then convert it
why the actual hell is the calculator not allowed
I know…some of these binary and hexadecimal conversions aren’t easy?!? 😮
Uhhh, sir, we dont have calculators in our paper 1
No…no calculator I’m sorry to say
thanks for replying sir!@@mrbulmerslearningzone
It's great that someone such as yourself is making these videos in alignment with the new syllabus. You have no idea how helpful that is to all of us students here.
I have to ask though. Considering how calculators aren't allowed, I followed through without using the calculator and doing the calculations normally and I have to say it's rather time consuming. Do you believe such numericals come in the exam? Especially the part where you multiplied 64 GB into bytes. Perhaps the multiplication is doable but the division is absolutely absurd! 68719476736/4423680. No matter how I tackle that, it's painfully obvious it's unsolvable with regular techniques.
Let me know if you need anything else….A* all the way :-)