Explain how you would implement a linked list (insert, delete, traverse). Glassdoor What is a pointer in C/C++? What is a union vs struct? (They have asked those concepts) Glassdoor Given a 2D array (say 100×100), how would you check if there is a square (or rectangle) present in it? (Logic / algorithm style) geeksforgeeks.org Image processing / computer vision: e.g., What is camera calibration? What are intrinsic/extrinsic parameters? What is depth map / disparity map? (because for senior CV role they mention stereo camera, calibration) VisAI Labs OpenCV/basic filters: e.g., how would you detect edges in an image? Or how would you detect a rectangle in an image? Data structures & algorithms: e.g., sorting, search, complexity, maybe a puzzle like probability or logic. (Many reports show puzzles) Glassdoor +1