Describe system testing.  

System testing:

System test are designed to authenticate a fully developed systems with a view to assuring that it meets its requirements. There are three types of system testing:

Alpha testing:

This refers to system testing that is carried out by the test team within the organisation.

Beta testing:

This is the system testing performed by a select group of friendly customers.

Acceptance testing:

This is performed by the customer to verify whether or not to accept the delivery of the system.