the difference between waterfall model and software process model

Analyse the following highly simplified procedure: Ask: “What type of ticket do you require, single or return?” IF the customer wants ‘return’ Ask: “What rate, Standard or Cheap-day?” IF the customer replies ‘Cheap-day’ Say: “That will be £11:20” ELSE Say: “That will be £19:50” ENDIF ELSE Say: “That will be £9:75” ENDIF Now decide the minimum number of tests that are needed to ensure that all the questions have been asked, all combinations have occurred and all replies given a)3 b)4 c)5 d)6 Please explain answer of this Question. Thanks

Aspire,

Plz tell me Possible test cases for Date Coulmn In any BILL .

Explain the difference between a bug and a defect