Ankit, while I am personally quite impressed, as that unambiguously demonstrates solid mastery of the material, the current incarnation of the 819 places a very high value on getting the right answers very quickly.
It seems quite easy for someone who knows more of the material quite well, but tends towards being a bit more slow and careful to be left behind in the dust by someone who knows it pretty well, but is just naturally a speed demon.
It is not clear how much of this is because those hiring people with Certification want speed demons on their teams, and how much of it is accidental due to combining the 815 and 816 into one big fat exam, which they decided not to make three hours long.
Either way, speed and strict time management is now something that everyone but the naturally fastest test-takers need to keep in mind (without causing panic to sink in, which will of course kill one's performance) when it comes to the 819.
That said, even among minor Speed Demons that would find they finished the 819 with time left over, successfully completing the chapter review questions in an average of one minute would mean one could have saved the production team on the Flash series from having to use computers to speed up filmed scenes. 108 seconds requires unflagging focus and forward momentum from start to finish, 60 seconds...feels like
you should be on tv playing The Chase against Java Jeopardy Champions, not taking a mere cert exam.