Answer Posted / pradeep kumar sharma

These types of testing come under the performance testing.
Whenever we have to test the performance of the testing
application/system, then we have to do these testings.

Load Testing is done on the basis of predefined number of users.

Stress Testing checks the application on more than
predefined number of users or in the abnormal conditions of
the application. Mainly,it checks how robust the application
is and verifies that application consistently provides
satisfying performance under unfavourable and extreme
conditions.

Spike Testing is a testing process in which we test the
application by suddenly increase and decease in load for
short time duration.We analyse the reaction of the
application with this unexpected rise and fall of the users.

Scalability is the ability of the system to handle the
growing amount of work in a graceful manner or to adjust
that growth. To check this ability, we perform thse
Scalabilty Testing on the testing application.

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