Software Testing Levels:

Generally, Software testing is performed at various levels of software development process using different testing techniques.

• Unit Testing: Unit testing examines the proper functioning of each component belonging to the software product before the developer completes the unit development.
• Integration Testing: Integration Testing: A software product consists of various software modules, coded by different programmers. Integration Testing focuses on checking proper data communication between these modules. Integration Testing is a phase where software modules are integrated logically and tested as a group.
• System Testing: This testing phase evaluates the behavior and working of the whole system from a user point of view, with the help of specified business requirements. The main motive of system testing is to evaluate functional/ business/ end user requirements.
• Acceptance Testing: This phase of testing is done by the client to ensure the whole software product is as per the specified business requirements