073. AQA A Level SLR10 Bits, bytes and unit representation
About this video
AQA Specification Reference
AS Level 3.5.3.1-3.5.3.2
A Level 4.5.3.1-4.5.3.2
In this video we looks at the units used to represent data storage in computers. The difference between a bit, nibble, byte, kilobyte, megabyte, gigabyte, terabyte and petabyte are explained. These are known as measurements of capacity, or how much data can be stored either in memory or on secondary storage devices.
Key questions:
- What is the fundamental unit of information in a computer system?
- How do we represent quantities of bytes using:
1. binary prefixes representing powers of 2; and
2. decimal prefixes representing powers of 10?
00:00 Bits, bytes and unit representation
00:05 Intro
00:10 Living in an analog world
00:59 What is binary?
01:21 Random-access memory (RAM)
01:40 Hard disk
01:56 Optical disks: DVD-RW
02:15 Solid-state memory
02:31 Bit patterns
04:41 Bits, bytes and unit representation
06:52 Key questions
07:12 Outro
Last updated: 04.09.25
