What are the various software testing levels?

Unit testing

Among the software testing levels, unit testing is the lowest level. The software’s modules or applications are referred to as units. The programmer who tests the modules also performs unit testing, and immediately fixes any discovered bugs.

Integration testing

All of the tested components are combined to form integration, and they are all tested collectively. Data that moves from one module to another is tested as part of integration testing. In essence, it examines the interaction between two or more modules, but not their functionality alone.

System testing

System testing tests the complete or integrated system. It evaluates the software to ensure it complies with standards outlined in the SRS guideline. It conducts both functional and non-functional testing and is the last test.

Acceptance testing

Customers or users conduct acceptance testing to determine whether the product satisfies their needs.