How can you create a game using computer vision.

In the first round, swap 2 numbers without third. What is linked list type of linked list. What is polymorphism. Around 5-6 questions about pointers and finding output (call by reference and value). In second round, difference between c++ and python/java. Are there pointers in python/java. How do pointers work in c++. Make a linked list in c++. Then they ask about your project work.