Match the following terms and statements.

1.Decision Table Testing 
2.Decision Testing 
3.State Transition Testing 
4.Exploratory Testing 

(W). Testing carried out w boxes to achieve specific test objectives, possibly to complement structured testing. 
(X). A test technique used which may be used to verify different system re depending on current conditions or previous history. 
(Y). A test technique which combines combinations of inputs that might not otherwise have been exercised during testing. 
(Z). A form of control flow testing based on decision outcomes.