IGCSE Computer Science 2023-25 - (1) Data Representation - 1.3(a) data storage and compression

VIDEO: 1.3(a) data storage and compression
IGCSE Computer Science 2023-25 - (1) Data Representation
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.

[shaharyarlalani]

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?

[gazey]

If they give this, I’m dead. I need a calculator and they don’t even allow it

[vijayageethagic]

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..

[fairywi]

Thank you!! You're a life saver!!

[hyper]

This is a example of not all heroes wear capes

[shlokrambhad]

You good at explaining Bulmer 😊 these vids are really helpful

[Dark-dsvr]

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

[VENOMATOR]

In exam style question 3, why did you convert into Mibi bytes. It wasn't specified in the question

[mazenzaheer]

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?

[stings]

i have a question for example paper question 3 they said the audio had stereo channel so could we multiply the file size by 2 at the end instead of multiplying in the bits

[mathermoth]

12:58 sir why did we divide the bytes to MiB?

[muhammadabdullahshafiq]

Sir, Please upload material on unit no.8 "Programming

[urdaddygonetogetmilk]

why the actual hell is the calculator not allowed

[mayamanivannan]

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.

[Wonniecherries]

In example three, can you tell me why we converted into MiB bytes?
I'm really confused!

[NimraTabassum-wl]

Sir at 12:55 why are we converting the file size into MiB, when the question doesn't ask us to do so?

[gamedemicjunior]

sir if in 12:50 if there was 3 channels we would multiply it with 3 right? (in step 3)

[Ym-._.-]

Sir, for 8:12 why do we need to times by 1024 3 times?

[NimraTabassum-wl]

Sir why do we divide the file size by 8?

[theadventurer]

I just want to know whether I can use calculator or not