HI

   Change the souce code then check the application.
   the application should have "bug".

   sun_ramprasad@yahoo.com

Mutation testing is used to test the quality of your test 
suite. This is done by mutating certain statements in your 
source code and checking if your test code is able to find 
the errors.

mutuation means a change in a programm. after making 
changes in program technical testers will go to run the 
program in both configuratons (customer, developer) to 
check whether the program is correctly responding or not 
with respect to changes

to change ur code. it raise the bug.
checking whether ur test suite detect the defect or not.

testing in which two or more variants of a component or 
system are executed with the same inputs, the outputs 
compared, & analyzed in cases of discrepancies.

HI,
In mutation testing we create a duplicate copy of the code
that is called as mutant and do some changes in the codes in
the mutant copy and then we test and check weather the
changes are been detected or not and whether it is creating
any effect on the original copy of the code or not. 
If we change the code of the program (this process is called
mutation) and we run the mutated program (mutant) against
the test suite, we will have two possible scenarios: 
1. The results of the program were affected by the code
change and the test suite detects it. If this happens, the
mutant is called a killed mutant. 
2. The results of the program are not changed and the test
suite does not detect the mutation. The mutant is called an
equivalent mutant. 

Plz correct me if i m wrong...
Regards..
nitin9360@gmail.com

mutation testing means a known change . during this testing 
devlopers will check whether all the modules are 
participating or not while executing the program

mutation testing is a testing where our goal is to mutaint 
s/w fail.

prepare the test cases & compare it with mutant, whenever
our test case is match with mutant s/w that we can say 
mutation testing is completed.

whenever, our test cases are not match with mutation s/w, 
we can fail it.