bhargavhhhhhhhh
How do official mock test questions (all 2 times*1-6 tests) influence the real exam, does the concepts that tested in official mock have similar concepts in real exam?
The real exam and the official mock share the same syllabus. In real exam, a same concept can be tested in a different way from the mocks. Or you can be presented questions on the same concept but of different difficulty than the mocks.
I understand some people try to learn the concepts from the mocks. But imho, you should learn the concepts from some other resources - could be a book, Youtube playlists, or some online programs.
Then you apply the same concepts and strategies you learn from that resource to both the mocks tests and the real exam.