They asked to write own string functions using only pointers. like, strcpy,strcmp. Also asked more on pointers and polymorphism.

input: abcd efgh hijk lmno
ouput: bcba hgfe ... (reverse each) without using data structure and extra string space.

remove duplicate chars without any data structures and additional string.

linked list nth from last.

copy constructor

casting

look for double pointer ans call by reference topics too..