Lập Trình Linux

Files & File Systems: Crash Course Computer Science #20

Today we’re going to look at how our computers read and interpret computer files. We’ll talk about how some popular file formats like txt, wave, and bitmap are encoded and decoded giving us pretty pictures and lifelike recordings from just strings of 1’s and 0’s, and we’ll discuss how our computers are able to keep all this data organized and readily accessible to users. You’ll notice in this episode that we’re starting to talk more about computer users, not programmers, foreshadowing where the series will be going in a few episodes.

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Crash Course Physics episode on sound:

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Hướng dẫn cách sử dụng làm left, right, mid trong Excel
  • fast speaking and confidence in subject .

  • I often speed up informative YouTube videos by 25%.
    This extremely good presenter obviates the need, and speaks just about 25% faster than "normal" with perfect articulation and fluidity that makes it easy to take in what she is saying without any flaws to distract.
    A playback speed of 80% would "undo" a 25% increase over "normal". (1/1.25=0.8).
    If you slow this video to 75% (the closest to 80% that's available), the presenter sounds like she's speaking a little more slowly than normal, so I'd say, yes, she's naturally speaking about 125% of normal rate.
    And, very well done!

  • "Defragmentation […] once upon a time it was really fun to watch."

    RIP old Windows defrag tool 😢

  • Wait, so SSD is not write in order?r

  • This series is so good

  • superb …

  • After so many years, I finally know defragmentation means and what it does. Thank you so much.

  • Liked and subscribed! Loved this video. Thank you!!!

  • This video is really informative for knowing nitty gritty about file system specially "Block Storage"… It can also be used to understand about newly evolved Object storage…

  • that clears up a lot, cant believe I have just understood fragmentation after 20years using computer

  • i always somehow end up coming back to this computer science crash course XD

  • We expecting just tell the file system but you are starting from what the binary is and then what the data is how image store as rgb? What is the aim of this course just file system. All your videos like that. I think you are bad teacher. You should teach what ever students want to learn.

  • I love this episode ☝️❤️❤️

  • I know we're still far from creating artificial life, but damn, it's like computers have cells, tissues, and organs too but they need instructions to run. They just need autonomy. Imagine a life form that you can upgrade by switching out its organs or DNA… Oh wait… that might apply to humans too one day. The lines between technology and biology will only get more blurry.

  • It's great that the presenter doesn't shy away from "advanced" topics (in any of the videos in this course) – that provides something for every "level" (beginner / intermediate / advanced) of viewer. Great job with these videos !

  • 1:53 says Byte Rate but we don't use that phrase in Sound Engineering. It's bit-rate.

  • nU8KnU8K

    Author Reply

    Very useful!!

  • skoodilypoop.mp4 lmao

  • 4:53

  • How rigorous you have to be to modify each file only at the same time in day? That's some punctuality.

  • Nice programme

  • Good vid

  • Number of abstraction level > storage space in my head👍

  • "Thank you…" – Ian

  • Defragmentation, the only screensaver you watch with attention.

  • Crashcourse is better than my college professors

  • Hello

  • Thank you, I finally figured out what is metadata, and why it has this f…antastic name.

  • This is ridiculous, you can't learn anything because she speaks to dam fast, how are we supposed to process this information if you already talking about a new thing before we even get to think about it. CrapCourse


  • amazing content. Thanks

  • Too fast and annoying

  • You need to complete a course called "How to speak slowly"

  • Ah yes, the skoodilypoop event. A sad time in world history.

  • I'm having a quiz in 2 days. Thank you!

  • crash course has biggest impact on the world in recent decade. it changes the way we see YouTube, technology and education. thanks to green brothers.

  • One question, the so called «blocks» that you mentioned at 7:12, they are called clusters, right?

  • 2:14 – I understood that reference.

  • you have worked hard to make these videos.These videos are the best about computer science.

  • First I though, man I'm weird, shouldn't red+green+blue = black. Then I was vindicated as you said that it was fun to watch the defragmentation process, I honestly thought I was the only one.

  • this series is SO empowering

  • Very helpful. Thank you.

  • You have a "John_scream.wav" on your computer?

  • Carrie I LOVE YOU

  • Wow, you are so amazing. I love the course.

  • Skoodily poop animation

  • If directory files are the mapping tables, are they what get deleted when you format a drive?