These are two functional testing that can be defined as: Stress Testing: It is a performance testing, where the application is tested for stress or execution that means that it is tested above the threshold of the break and the point where the application gets broken is determined. When there are huge data and the number of users then it can arise. During the stress test, the application recovery time is also determined when the load gets reduced. Load Testing is also a type of performance testing, in this testing, the application is executed above various levels of load and the peak performance of the application is monitored on the server along with server throughput, response time, etc. Application integrity, performance and process stability are determined under concurrent system load in this testing.