Koh Young Technology Computer Vision Engineer interview questions

Initial interview with hiring manager involved general questions about experience, a math question. Then a long test for 2 hours about a bunch of topis from OOPS, programming, general computer vision,math. Then they asked a presentation about work done so far. After passing all the rounds, and also discussing compensation they rejected citing a petty reason that they knew all along about my application. Absolutely no respect for candidates time.