What are the advantages of using TestNG over JUnit?

Related questions

1. Which is better NUnit or MSTest?
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4. Should I write unit tests?
5. Is integration testing necessary?
6. Can we use both TestNG and JUnit?
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1. #possible
2. #easier
3. #parallel
4. #junit
5. #major
6. #grouped
7. #annotations
8. #there
9. #easily
10. #testng
11. #cases
12. #advantages
13. #testing
14. #understand
15. #three