What is mutation testing?

Purposely modifying an application in order to see if the testing suite will reject it

Testing the functionality of an application without knowledge of the application's code/internal structure

Testing with the specific purpose of seeing how a system will perform in the future

A technique in which all possible branches of the program's source code are tested at least once

Answer:
Purposely modifying an application in order to see if the testing suite will reject it

Note: This Question is unanswered, help us to find answer for this one