They ask all types of basic C++questions . One paper is this basics and the other consists of C++ programs that you need to write . Once you clear this round they take multiple rounds of interview in which they ask lots of OS , data structures and alogorithms .
Advice is to go though many interviewing sites giving free questions for there basic test . For writting programs bush up concepts of LL , Doubly linkedlist , treess , stacks .. almost everything . You should be able to code what your algorithm is .
