interview started with explain oops concept, polymorphism, encapsulation, call by value, call by reference different, get and post method, series 1,3,4,8,15,27,50 what is next number 2nd round 1.wirte a method with parameter() that will calculate total balls conditions : user will give the the nth of series calculate total number numbers of balls which is in series 2,1,2,1,2.....n

first they have aptitude and coding round after clearing they have technical round basic java question asked and some programs to solve they asked about static variable and method inheritance method overriding