This is material where I personally jot down things I don't know and briefly organize what I come to learn. If you know something among the unanswered questions, please leave a comment. Thank you.
Full Q&A List
[Answered]
1. Where do you use the com.jayway.jsonpath library?
Jayway JsonPath is a library that can partially extract values from json data using JsonPath notation (e.g., $.data[0]).
Reference