You should be able…

  • Define the terms bit, nibble, byte, kilobyte, megabyte, gigabyte, terabyte
  • Understand that data needs to be converted into a binary format to be processed by a computer

TOPIC OVERVIEW (Test your Knowledge)

This diagram below clearly shows you the relationship between the units of data you are expected to know about. Lets go on to look at these in a little more detail…

sizes

Bit, Nibble, Byte

A bit is the smallest unit of data that is represented on a computer and is shown as a single binary digit, either 0 or 1.  A Nibble is 4 bits and a Byte is 8 bits, or 2 Nibbles.

bnbTitle

Kilobyte

‘Kilo’ is the Greek word for ‘Thousand’.  A Kilobyte is commonly referred to as being 1000 bytes. however It is actually 1024 bytes. A Kilobyte would be enough to store 1024 characters: This is shown visually below. Remember that each character (A) takes up a byte of storage (01000001).

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

This sentence is exactly 50 characters long $%!&()

         This sentence is exactly

The following image is 15 Kilobytes or 15,000 bytes.

imagesMBM2P84P

Megabyte

A Megabyte is 1,048,576 bytes or 1,024 Kilobytes. However, you can refer to it as 1,000,000 bytes. The prefix ‘Mega’ means one million. To put it into context a Megabyte (MB) could store the following:

  • 873 pages of plain text (1,200 characters per page)

Gigabyte

A Gigabyte is 1,073,741,824 bytes. 1,024 Megabytes, or 1,048,576 Kilobytes. You can refer to it as 1,000,000,000 bytes! To put this into context a Gigabyte is enough to store the following:

  • 894,784 pages of plaintext (1,200 characters)
  • 640 web pages (with 1.6MB average file size)
  • 341 digital pictures (with 3MB average file size)
  • 1 750 MB Film

Terabyte

A Terabyte is 1,099,511,627,776 bytes, 1,024 Gigabytes, or 1,048,576 Megabytes. You can refer to it as 1,000,000,000,000 bytes. This would be large enough to store the following:

  • 916,259,689 pages of plaintext (1,200 characters)
  • 655,360 web pages (with 1.6MB average file size)
  • 349,525 digital pictures (with 3MB average file size)
  • 262,144 MP3 audio files (with 4MB average file size)
  • 1,613 650MB CD’s
  • 233 4.38GB Films

Tasks

1. True or False

2. Unit Size

3. Find the Mistakes