Load, peformance & stress testing will be conducted under 
system testing. Testers will be conducted.

system testing is like testing the entire application in 
the clients environment.it is always one by testers

System testing is a type of Black box testing. System 
testing means testing the application. After the 
integration testing, usually will do system testing. 
Functionality, Regression, and performance testings comes 
under system testing.

Usability Testing
Functionality Testing
Non-Functional Testing

After complition of integration test tester can do system
testing with the help of Blockbox testing techniqcs.
     system test divided into 3 types
     1. usability test
     2. functoinal test
     3. non_functional test

after finishing integeration testing the system testing 
will be conducting.under system testing the tester will 
conduct functional,performance,usability testing

Unit Test
Funtionality Test
Interation Test

If it is wrong plz give correct answere.

one more testing is there after finishing the performance 
testing i.e security testing.
     under system testing the tester will conduct 
   1.usability testing
   2.functional testing
   3.performance testing
   4.security testing.
     this is the correct sequence of system testing

There are several answers but the meaning of all answers 
are different from each other so which one is correct 
answer plz any one can tell 
thanks in advance

Your are right, but I want to try my version. According to 
me system testing is testing the whole application. In 
system testing there are 2 types
1. Functional - Testing the functionality of the 
application.
2. Non functional - Testing the performance, stress test, 
and secutrity test.

Who'll conduct each test?
This is decided by the test plan they prepare. In that 
they'll decide who has to test what. And for doing the 
performance and stress tests tester should have good grip 
on the load runner which is seperate module from the manual 
testing and the automation testing.

System testing is nothing but tesing the Entire 
Application.In this testing usually we will do 
Usability,Functional,non functional testings.This total 
testing is done by testers.