Sir at 3:56 it's written that unicode can use either 8, 16 or 32 bits PER character But at 4:06 you said that 32 bits can store upto 2.15 billion characters. This confused me 😔 And sir at 6:42 you stated that since amplitude range is 0-10 we can use 4 bit binary. Sir if it was even 0-15 we could've used 4 bit binary right? (As 15 is 1111 in binary). If it had been 16 the we would've needed an 8 bit binary, right?
Hi Mazen.. I ama refering to the UNICODE Versions: In UTF-8, common characters like “C” take 8 bits, while rare characters like “💩” take 32 bits. Other characters can take 16 or 24 bits. For example a webpage would take up about four times less space in UTF-8 than it would in UTF-32. So it loads four times faster... Does this make sense?
ok, it’s similar to picture resolution…Imagine you have a picture you want to copy, but instead of drawing every detail, you take tiny dots from the picture to recreate it. Sampling in recording works a bit like that. Instead of recording every single sound wave, we take tiny snapshots of the sound at different moments. These snapshots are called samples. Then, when we play them back really fast in order, it recreates the original sound, just like connecting the dots in a picture recreates the image.
Hello Sir, Thank you so much for these videos, they have helped me a lot as there are no resources for these newly introduced IGCSE computer science topics. I was wondering if you knew any websites we could use for questions concerning these topics. Thanks a lot ❤
@@eyadsayedmohamedsayedmoham8880 Hello Eyad. Yes I know but what i don't know is where to find these exam style questions if you have an idea on where I can find these resources it would help out a lot. Thanks 😁
@@mrbulmerslearningzone sir I have another query an image has 30 different colours. State the minimum number of bits needed to represent each pixel in the 30-colour image? I know the answer but can u explain how pls
@@anindyadutta3458 ...so I am guessing you know its 5.. here is why: To represent 30 different colours, you need at least 5 bits (because 2^5 = 32, which is the smallest power of 2 greater than 30). Here's why: With 1 bit, you can represent 2 different colors (0 or 1). With 2 bits, you can represent 4 different colours (00, 01, 10, or 11). With 3 bits, you can represent 8 different colours (000, 001, 010, 011, 100, 101, 110, or 111). With 4 bits, you can represent 16 different colours (0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, or 1111). With 5 bits, you can represent 32 different colours (00000, 00001, 00010, 00011, 00100, 00101, 00110, 00111, 01000, 01001, 01010, 01011, 01100, 01101, 01110, 01111, 10000, 10001, 10010, 10011, 10100, 10101, 10110, 10111, 11000, 11001, 11010, 11011, 11100, 11101, or 11110). Therefore, to represent each pixel in the 30 colour image, you would need at least 5 bits per pixel.
Hi, I am sorry to hear that...I will try and make the next one louder. Thank you for your feedback....Just a quick note about your BASIC NOUNS | VIDEO FOR BIGGINERS... beginners is double nn, not double gg...best wishes
I am sorry if you haven’t found it particularly helpful…I thought it was quite informative…If you need any additional help at all please let me know… have you visited my ‘textbook answer’ videos? Might be worth a look
A month back i achieved an A* in mid terms. thank you!!!
Glad to hear it…all the best, and let me know if you need anything :-)
A dream for me so far 💔
@@UmerKhan-lf9moeveryone's dream😅
Binge watching your whole igcse playlist for my computer science exam this week
same here
This helped me so much for my exams. Thank you !
your out there saving lives!
you literally teach better than my school teacher
You are too kind…Sponge where are you in the world 🌎 ?
@@mrbulmerslearningzone an international school in singapore
Im also in a international school in singapore and also thanks Mr Bulmer this helps a lot.
thank you! my mids are on nov 15 and this is really helping me.
...all the best for your mid terms 🙂
pog this helped for my midterms, thx
Thanks for your kind words
Very useful thanks !
Assalam-o-Alaikum... Sir... how the control codes in hexadecimal be 00 to 19??? Shouldn't it will be from 00 to 1F???
Sir at 3:56 it's written that unicode can use either 8, 16 or 32 bits PER character
But at 4:06 you said that 32 bits can store upto 2.15 billion characters.
This confused me 😔
And sir at 6:42 you stated that since amplitude range is 0-10 we can use 4 bit binary. Sir if it was even 0-15 we could've used 4 bit binary right? (As 15 is 1111 in binary). If it had been 16 the we would've needed an 8 bit binary, right?
Hi Mazen.. I ama refering to the UNICODE Versions:
In UTF-8, common characters like “C” take 8 bits, while rare characters like “💩” take 32 bits. Other characters can take 16 or 24 bits. For example a webpage would take up about four times less space in UTF-8 than it would in UTF-32. So it loads four times faster...
Does this make sense?
@@mrbulmerslearningzone Yes sir! Thank you Soo much!!
keep up the good work ❤
You love Sir 💗
Love from Pakistan 🇵🇰♥️❤️
Thank you for your kind words :-)
Plz send video of conversion practise denary to binary to denary to hexadecimal to binary and hexadimal to denary
I have done all the conversioons...have a look here and in the playlist: ua-cam.com/video/4Vrlrxl0o5w/v-deo.html
A very good short video to revise thoroughly before the main exam. Thank you so much.
Glad it was helpful!
Sir can you plz tell that how sampling is used to record a sound clip
ok, it’s similar to picture resolution…Imagine you have a picture you want to copy, but instead of drawing every detail, you take tiny dots from the picture to recreate it. Sampling in recording works a bit like that. Instead of recording every single sound wave, we take tiny snapshots of the sound at different moments. These snapshots are called samples. Then, when we play them back really fast in order, it recreates the original sound, just like connecting the dots in a picture recreates the image.
At 10:31 ... Is it okay to represent white cells with 0 and black cells with 1???
Especially a 1 bit black and white image
Good job. Thank you so much
Thanks,helped a lot
Thank you so much sir!!!!
.
Can you please solve the Exam style Question given at the back of the chapter.
Have you seen the TEXTBOOK ANSWER Videos I've produced?
@@mrbulmerslearningzone thanks a bunch
@@mrbulmerslearningzone Yes but can you make ones on the exam style questions? I really appreciate your vids, thanks a bunch 😄
Hello Sir, Thank you so much for these videos, they have helped me a lot as there are no resources for these newly introduced IGCSE computer science topics.
I was wondering if you knew any websites we could use for questions concerning these topics.
Thanks a lot ❤
Just solve exam style questions they are so important for these new syllabus
@@eyadsayedmohamedsayedmoham8880 Hello Eyad.
Yes I know but what i don't know is where to find these exam style questions if you have an idea on where I can find these resources it would help out a lot.
Thanks 😁
@@yazanhousrom3858 It is in the IGCSE and O Level Computer Science Second Edition text book
will the new syllabus for computer be completed before may/june session???
Can you please share the link of the slides?
Hi, I am uploading all the PowerPoints to: www.buymeacoffee.com/learningzone
sir do you have past pa[per attempt videos?
Have a look at my playlists… e.g.
ua-cam.com/video/2Oj6g6yLLlo/v-deo.htmlsi=XiML6xCcL9015J9w
@@mrbulmerslearningzone thanks sir!
Plz, what is the name of the book?
IGCSE Cambridge o level second edition
Thank you so much, this was very effective 😊
You’re welcome 😊
how is the number of characters calculated from bits
The number of bits just determines how many characters you can have… a bit like colours… the more bits the more characters
@@mrbulmerslearningzone sir I have another query
an image has 30 different colours. State the minimum number of bits needed to represent each pixel in the 30-colour image?
I know the answer but can u explain how pls
@@anindyadutta3458 ...so I am guessing you know its 5.. here is why:
To represent 30 different colours, you need at least 5 bits (because 2^5 = 32, which is the smallest power of 2 greater than 30). Here's why:
With 1 bit, you can represent 2 different colors (0 or 1).
With 2 bits, you can represent 4 different colours (00, 01, 10, or 11).
With 3 bits, you can represent 8 different colours (000, 001, 010, 011, 100, 101, 110, or 111).
With 4 bits, you can represent 16 different colours (0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, or 1111).
With 5 bits, you can represent 32 different colours (00000, 00001, 00010, 00011, 00100, 00101, 00110, 00111, 01000, 01001, 01010, 01011, 01100, 01101, 01110, 01111, 10000, 10001, 10010, 10011, 10100, 10101, 10110, 10111, 11000, 11001, 11010, 11011, 11100, 11101, or 11110).
Therefore, to represent each pixel in the 30 colour image, you would need at least 5 bits per pixel.
@@mrbulmerslearningzone yooo thanks I never thought I would get free tution in yt😂😂
344 Kemmer Ferry
how can we get access to the notes?
@@haiii5510 I know, I have a soft copy of it
buymeacoffee.com/learningzone
I love you bro
Bro because of you I got 29/30
Absolutely brilliant :-)
Im six years old
@@CR7ST1AN0. …well that’s incredible
Hello sir, I am also a computer science teacher, is it ok if I want your courseware? Thanks
Yes, sure... buymeacoffee.com/learningzone
@@mrbulmerslearningzone Hi，I can not pay for dollars
Why can the 32 bits only store 2.13 billion my calculator shows 2^32 is 4.3 billion
you really deserved Thanks
Helpes me tooo
I just turned on my sound to hundred but your voice is slow
Slow or quiet?…I don’t understand?
Quit i mean but dont mind if you minded my words im srry
Hi, I am sorry to hear that...I will try and make the next one louder. Thank you for your feedback....Just a quick note about your BASIC NOUNS | VIDEO FOR BIGGINERS... beginners is double nn, not double gg...best wishes
im srry but your voice is good
Wear a head phones
No benefit of this when ur js reading same text from book u have to explain it as well
I am sorry if you haven’t found it particularly helpful…I thought it was quite informative…If you need any additional help at all please let me know… have you visited my ‘textbook answer’ videos? Might be worth a look
🎀🫶
Bro is a talking plumb
Cant stay awake