Oracle Appplication Developer interview questions

Oracle OFSS visited our college for recruitment. The process included one test of 2 hr 30 min & 2 tech & 1 HR interview The test consisted of 1) Quants(Easy) 2) Verbal(Easy) 3) Database(Okayish) 4)Data structures(Easy) 5)Tree,Avl tree mcq on codes(Tough) Test consisted of only mcqs. 200 people gave the test out of which 36 were shorlisted This 36 students went thr the interview process Round 1. Q in Round 1 were basic JAVA . Diff btw abstract & interface. Why we use abstract? Write code to find max of 3 Nos. in a single line. Explain each term in public static void main. Diff btw importing & extending classes? After Round 1 , 10 people were selected for Round 2 Round 2- Tell me anything you would like to talk on & the whole interview will be taken on the technology you are interested in ,mine was ML Round 3-It was the HR round ,6 people were selected fir this round out of the 10 Given an array ,construct an array with max no at middle ,next max at right to it & next max to left of it & continue similarly. All who went for the HR round were selected!