Black-box testing is a method of software testing that examines the functionality of an application based on the specifications. It is also known as Specifications based testing. Independent Testing Team usually performs this type of testing during the software testing life cycle.
This method of test can be applied to each and every level of software testing such as unit, integration, system and acceptance testing.
There are different techniques involved in Black Box testing.
Equivalence Class
Boundary Value Analysis
Domain Tests
Orthogonal Arrays
Decision Tables
State Models
Exploratory Testing
All-pairs testing