Memory (how does a computer store data ?? )

Junaid Ahmed
A free video tutorial from Junaid Ahmed
Technology Author, Leader, Strategist and Trainer
4.3 instructor rating • 9 courses • 40,771 students

Lecture description

Have you ever wondered what is memory how can you store GB of pictures and text in electronic devices, I always did.

What is it (Pointers)

  • Learn how a computer memory works
  • Understand ASCII encoding
  • Understand How to convert binary and map to ASCII

phew thats that...

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05:35:43 of on-demand video • Updated August 2021

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English [Auto] Elsewhere and this week we're going to see how we release towards data. Well some folks this may be dark for some baubles maybe a recap and something completely new. So let's do this. So the stores data basically in different devices like a ram or a hard drive or a flash drive or any of the other devices. These devices have a capability to store either a 0 or a 1. And this is essentially an electric charge or Rankine or devices and it is not sold on condition or upgraded or a magnetic device though just zeros and ones we store all the data. So you must be wondering how much. Let's go ahead. Now what is a bit bit is the smallest unit of storage. So this is where the actual 0 or 1 is stored. A byte is 8 bits. Now how much can a byte really store so byte and store combinations of. So our aid. So you have 56 combinations which you can store in a bike. So in other words you can store 0 to 255. Let's say that we store some value in a byte. So technically speaking a big carry either a 0 or 1 so 8 bits is one byte. So what does this mean. I mean how do we really can what does something mean. So what we do is we can what the binary to decimal outdrew that is you multiply each of these numbers or whatever you want to call them with the power of two. So you start from two bars zero. All the way 128. But you know as one wire one is two and so on to bar eight. Just one already. Now you multiply 1 and 2 then you get 128 and then 0 0 64 and 1 and 1 and so on then you get a number as 97. No one is 90 percent. Now how can you use then-Senate. So most of us use ASCII. So this is encoding and they use Unicode. You're not going to talk about that. So what is ASCII ASCII basically has zero to do with divine guidance or direction one bit by a number. So for what it means is 97 and ASCII is a. And if you want to gamble Galbally that's going to become 65 just in general what age of 59 and number is 0 9. Sixty five 90 are letters A to Z in in gaps minus 7 to $120 is a doozy in small characters but it was space and the rest of the actors are big for special characters and things like that. Now let's see how to write Hello. So if you really want to write hello in binary. So you want to say 70 to 69 sounds like an. And it would be me. So that's how you actually can it by nager pessimal and map the decimal point as you go. Thank you.