1. What is Cross- Browser Testing?
   1. A form of data-driven testing can drive different data sets using <parameter> tag & @Parameter's annotation.
2. Parameter Tag via XML File
   1. Specifies name & value of parameter.
3. Parameters Annotation
   1. Purpose : To point out how to pass parameters & which parameters to pass to test method.
   2. Different from parameters in test method.
   3. A list of parameter names to be looked up in XML file.
   4. Parameters in test method receive values from XML file.
   5. To execute this, run XML file. A failure will occur if we execute from the class.
4. Additional Concepts
   1. Ability to disable a test method by setting enable false
   2. Executing TestNG from command prompt
   3. Execute a package at runtime
   4. Provide optional values using @Optional annotation
   5. Add Listeners which is a registration for test results
   6. Add Logs
   7. Ability to view default reports
   8. Create custom reports
5. Different Ways To Supply test data
   1. Hard-coded test data sets
   2. Use other ways such as CSV files, databases, properties files, or Microsoft Excel.