Data structures and algorithms based ones are the questions to watch out for during the Techical round (round 2) along with certain questions that would test out the problem solving capability and approach of the candidate. The most unexpected and difficult questions will be from data stuctures - such as the difference between various types of sorting algorithms and their order - along with what to prefer in certain situations. The questions I was asked was to compare and contrast insertion sort and quick sort and list out when quick sort should be used.