Data representation

Data representation

1. Terms to remember:

   • Terms to remember flashcards
   • Bit
   • Nibble
   • Byte
   • Kilobyte
   • Megabyte
   • Gigabyte
   • Terabyte
   • Petabyte

2. Binary

   • Why data needs to be converted to binary to be processed by a computer
   • Covert denary to binary
   • Adding binary
   • Explain binary shifts
     • Left
     • Right

3. Hexadecimal

   • from binary to hex
   • From denary to hex
   • And back

4. Character sets

   • Define
   • How binary is used to represent characters
   • How more bits = more characters
   • ASCII
   • Extended ASCII
   • Unicode

5. Images

   • Represented in pixels
   • Color depth
   • Bitmap
   • Resolution
   • Metadata

6. Sound

   • Sampling
     • Sample rate
     • Amplitude
     • Bit depth
   • Analogue

7. File size

8. Compression

   • Lossy
   • Lossless

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