2.3 robust programs

2.3 robust programs

1. data validation

   • does not make inputs accurate
   • makes sure input is sensible
   • range check
     • technique used to make sure something is accurate
     • e.g. verification, dual entry
   • test data:
     • normal
       • any value within range e.g. 3, 4, 5, 6, 7
     • extreme
       • the start and end points e.g. 3, 7
     • erromeous
       • beyond range e.g. 2,15

2. data sanitation

   • makes sure inputted data can be processed
   • reduces inputted waste

3. authentication

   • needed when entering a password and username
   • security procedures

4. Binary search

   • list needs to be in order
   • takes the middle value and compares to desired value
   • if value is too small it goes to the value on the right
   • if value is too large it goes to value on the left
   • complex algorithm

5. Linear search

   • only used if data is not in order
   • checks every value and stops when desired value is found
   • long search
   • simple algorithm

6. bubble sorting

   • moving through list and swapping values
   • repeats until data is in order
   • does a final check to make sure data is in order