Essa empresa é sua?
Mostly they asked questions from Java like difference between Exception and Error, what is finally block, try and catch, oop concepts like polymorphism, inheritance. some basic questions like difference between class and object, difference between overloading and overriding. They asked me to write code to find frequencies of elements in an array. Also they asked questions form dbms and os like write sql query to find the frequencies of elements in a table, what is round robin algorithm etc.