What is the difference between structural and functional testing?
A D V E R T I S E M E N T
Functional testing is a "black box" (behavioral) testing where the tester verifies the functional specification. Bottom-up approach: In this approach testing is conducted from sub module to main module, if the main module is not developed a temporary program called DRIVERS is used to simulate the main module. Top-down approach: In this approach testing is conducted from main module to sub module.