Endurance Testing: Checks for memory leaks or other 
problems that may occur with prolonged execution. 

it is also called soak testing. it is testing the 
application under heavy volumes of data for a prolonged 
period of time

Endurance testing is nothing but Security Testing
Testing how well system provides security against 
unauthorized internal or external access

Endurance Testing: Checks for memory leaks or other 
problems that may occur with prolonged execution

Is conducted to identifieed the systems behavoure for longer
execution times. memory leaks and buffer over flows r
usaually identified through the testing.

 Suneel Reddy's answer is absolutely wrong