What is functional testing in manual testing?

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Tags

1. #tested
2. #functional
3. #features
4. #requirements
5. #whereby
6. #input
7. #expected
8. #functions
9. #examining
10. #identify
11. #perform
12. #testing
13. #system
14. #against
15. #software
16. #output
17. #specifications
18. #feeding