Computing Revision

Computing Revision

1. Level Languages

   • High Level
     • Designed to be understood by humans
     • Eg. Python
   • Low Level
     • Designed to be understood by computers
     • Eg. Binary

2. Data Types

   • Real
     • Money is decimal numbers
   • String
     • Uses characters/letters, telephones are string of digits
   • Character
     • A single letter
   • Boolean
     • True or False response

3. Testing Data

   • Normal Data: program should ccept this
   • Erroneous Data: data type which program shouldn't accept
   • Invalid Data: correct data type, unacceptable value
   • Boundary Data: data at limits of what program can handle
   • Used to find defects before releasing data