What is testing ,modules,testcase

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Testing is the process of evaluating a system or component to identify defects or errors.

Testing is an essential part of the software development life cycle.
It involves executing a system or component with the intention of finding defects.
Modules are independent units of software that can be tested individually.
Test cases are specific inputs, conditions, and expected results used to validate the behavior of a system or component.
Test cases are designed to cover different scenarios and edge cases.
Testing helps ensure the quality, reliability, and functionality of software.
Examples of testing techniques include unit testing, integration testing, and regression testing.

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