Computer Science test revision.

Computer Science test revision.

1. DIV and MOD

   • DIV is how many times it can be divided
   • MOD is the remainders of a number

2. Arrays

   • An element is one part of a big group and theses elements can be CALLED UPON individually
   • An array is a data structure of a collection of elements.
     • TeacherNames = ["MrEsch" , "DrWatts" , "MrCraig" ]
       • Must be in square brackets or it will be shown as a syntax error
       • The position of "MrEsch" is 0 most of the time the first element would be 0 in an array
   • a position or an index is what order the elements are arranged in starting from 0

3. Testing

   • VALIDATION can not check is data is accurate but can check if it’s sensible ,reasonable and meets requirements
     • Data validation can’t check if the data is accurate
   • TYPES OF DATA
     • Boundary data are the values at are the limits which the program should accept
     • Normal data is a data that the user is likely to input.
     • Erroneous data is data that should not be accepted.
   • TYPES OF TESTING
     • Iterative testing is the test when you are still in the making of it.
     • Final testing is the testing that happens right before releasing the software.
   • Data sanitation (like hand sanitizer) will remove unwanted characters (germs) from an input before processing
   • Authentication is to check if the person is actually who they say they are before allowing them to access the system/network.
   • Data verification is making sure the data entered is EXACTLY correct before processing.
   • Data validation is checking if the data is sensible and reasonable before processing.
   • Verification is something a login system would need to design

4. by Alice Mu