black box testing:
    black box testing focus on the functional requirements 
of the softawre. this type of testing method attempts to 
find incorrect or missing functions, errors in data 
structure or exrenal database acces,initialaisation and 
termination errors.
  black box testing is conducted on integrated functional 
components whose design integrity has been verified through 
completion of traceble white box testing.
  black box testing focus on system externals
 black box testing the test cases are created using system 
externals.
 
in black box testing we test the softawre without know how 
it is working.

here blindly we r testing the software thats why we call it 
as black box testing.

here we test the behaviuor of the application thats we also 
call it as bahavioural testing.



white box testing:
white box testing examines the basic program structure and 
it derives the test data from the programing logic.ensuring 
that all statements and conditions have been executed 
atleast once.
white box testing verify that the software design is valid 
whether it was built according to the specified design or 
not.
white box testing also called as stuctural testing.

 in white box testing the tester should aware of the code.
execute each statement atleast once .

execute each decision direction atleast once.
execute each decision direction with all possible outcomes 
atleast once.

Browser is testing: It is used to check same application 
multiple browser.
Functional testing: It is used to check the requirements or 
business logic
GUI testing: It is used to check front end. 
Re Testing: It is used to re testing the fixed defects 
check whether fixed or not.
Performance testing: It is used to check system response 
and through put of the application.

whitebox and blackbox testing are testing 
methodologies.where as 
performance ,stress,load,usability,......are the testing 
types.

Black box and white box testing r d methods of software testing.

levels of testing is unit testing,integration testing,system
testing,user acceptance testing.


Testing type r mainly divided into two types:
i)Funtional testing
ii)Non functional testing

Functional testing is to check the functionality of features
of the application.
regression testing ,smoke testing,sanity testing,requirement
testing etc. r d functional testing.

Non fuctional testing is performance testing,load
testing,sterss testing,security testing .