Answer Posted / Vineet Tyagi

Parameterization in TestNG allows the reuse of test methods with different sets of data. This is achieved by defining a Test Method with parameters and then providing the required values through an XML file (testng.xml). Each set of parameter values is called a Test Data Set. To pass parameters, you need to define a `<parameters>` tag in the testng.xml file and map it with the corresponding method parameter using the `dataProvider=` attribute in your @Test methods.

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