One of the most common, but unfortunate misuse of terminology is treating “Load testing” and “Stress testing” as synonymous.   The consequence of this ignorant semantic abuse is usually that the system

Is neither properly “load tested” nor subjected to a meaningful stress Test.

What is Load Testing?

Testing the Application with customer expected load in customer expected environment is called Load Testing.

What is Stress Testing?

Testing the application with customer expected load in customer expected environment continuously until the application breaks/crashes is called Load Testing.

In simple words we can say: Load test doing continuously to find the system break point is called Stress testing. This is very important question in Interviews.