Q > What is the difference b/w priory and Severity ?

Priority is about scheduling .

Severity is about effect of bug .

H-Severity L- priority
Suppose we have baking app. that calculate weekly , monthly and yearly Banking reports

We have bug in yearly Report . So this bug with H-Severity L- priority
Because it can be fix in next year release

H-Severity H- priority
Suppose we have baking app. that calculate weekly , monthly and yearly Banking reports

We have bug in Weekly Report . So this bug with H-Severity H- priority

Because we have only one week time to fix

L-Severity H- priority

Wrong Logo  on website is the example .Typo error of Client name on HOME PAGE
Because we can get bad impression due to this

L-Severity H- priority

Typo error at in page that has less hits

What is the difference b/w Verification and Validation ?

Verification :- It done through out process . means
Evaluate work product (not the actual final product )

Question - Are we building the product right ?


Validation :- done by tester . Check whether product full fill the need

Question :- Are we building the right product ?

What is the difference b/w ERROR , Defect and Bug ?

ERROR :- Program error it may be (Syntax , Logic,Run time)
Defect :- when ERROR found by tester
Bug :- When developer agree to defect



What is the difference b/w User Story , Use case and Test Cases ? 

User Story :-  Given by  Client requirement . which is not in proper format and  requirement is not detailed 
Use case  :- It is prepare by Business Analyist   .
Test Cases :-  Test case is prepared by test engineer and in small companies sometimes it is prepared by quality analyst too. 

V- Model Flow :-