AS & A Level Computer Science (9618) - Chapter 1: Understanding Data Representation

0:00 Introduction to Binary, Denary, and Hexadecimal
5:29 Converting from Binary to Denary and Vice Versa
8:25 Converting from Binary to Hexadecimal and Vice Versa
11:09 Converting from Hexadecimal to Denary and Vice Versa
13:02 Numbers and Quantities (Prefix), Storage Terminology
16:40 Represent Negative Numbers with Two's Complement
19:55 Binary Arithmetic
25:06 Binary Coded Decimal
29:57 Representing Text (ASCII, Unicode 1/2/3/4 byte code)
36:18 Representing Image (Vector Graphic, Bitmap)
43:36 Representing Sound (Sample Rate, Sampling Resolution)
48:20 File Compression (Lossless, Run Length Encoding, Huffman Encoding) & (Lossy)

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Credit:
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[jamesganleongyi]

Hey, thanks for watching 😉!

You can purchase the slides that I use here 🏬:

[TheJigzs]

I recently purchased your AS and A Level slides, and I am thoroughly impressed. The slides are well-organized, visually engaging, and make complex topics easy to understand. These YouTube videos further help & support the usage of those slides too. I highly recommend your resources to anyone looking to save time for teaching or learning using your resources! Thank you so much. Keep up the good work!

[kombu]

ur igcse playlist the only reason i survived, hopefully ur a level playlist can clutch up too

[wanarrbaby]

l would like to thank youu soo muchh. Your videos really pushed my grade from an E to a B for my IGCSE exam!!❤️

[Aryan-cxlm]

Please continue this series the first was already so helpful

[shunshunn]

your O level videos helped me through O levels so much, thank you so much for making A level videos haha I think I even requested you to make A level CS content in one of your older videos omg im kinda hyped tyty

[solomonendryas]

thank you for doing A level your IGCSE series really helped me

[yousufahmed]

Sir you are the mannn ever May God Bless you alot I am now in gcses but still I am very hopeful now to see you making lectures on A levels may GOD bless you alottt

[ChungLvr]

you are amazing, helpful and complete. THANK YOU SIR

[andiamruby]

Yaayyayayya FINALLY! I was waiting for your videos😭thank you so much for showing up as my csc hero once again!

[ZohaibHassanAfridi]

Excellent explanation. Please let us know which course book are following to cover all these chapters?

[anonymouslearner]

You are the man Sir. I love this series.

[s.m.]

Thanks a lot, this is seriously so helpful, I'm just starting A-Levels and this is perfect!!!

[royalblood]

Dude i really hope this video works, started doing CS this year in AS never did it in O Level and im really behind please please please work
(if it does im coming back to comment in 2 weeks)

[ali]

Just started my as level year, these were very helpful in igces (even though we didn't have the paper1 in mj 23 😂😂) still helped me through out my internals!!!

[annamontana]

I'm doing AS right now (first year of A-levels so which topics am I required to watch, study and practice?

[thecoolwizaerd]

u made a mistake at 12:03 E in hexadecimal is 14 not 15, F is 15

[Aisha-gddq]

I dont understand how you are so intelligent 😭

[BTTang-uxlv]

I was wondering if anyone has the answers for the Exam-style questions from the course book. Or if James could do a video series, that would be great.

[djsilenze]

Hey james! Your videos are amazing. Just a question, are you interested if you do computer science course video for the IB program?