Black Box Vs White Box Testing

Sl.No	Black Box	White Box
1	Focuses on the functionality of the system	Focuses on the structure (Program) of the system
2	Techniques used are : ·Equivalence partitioning     ·Boundary-value analysis   ·Error guessing      ·Race conditions      ·Cause-effect graphing  ·Syntax testing  ·State transition testing  ·Graph matrix	Techniques used are: ·Basis Path Testing ·Flow Graph Notation   ·Control Structure Testing      1.      Condition Testing 2.      Data Flow testing ·Loop Testing 1.      Simple Loops 2.      Nested Loops 3.      Concatenated Loops 4.      Unstructured Loops
3	Tester can be non technical	Tester should be technical
4	Helps to identify the vagueness and contradiction in functional specifications	Helps to identify the logical and coding issues.