How do you handle sensor noise and drift when fusing data from multiple sensors (e.g., IMU + camera + LiDAR)?, Walk me through how you'd tune a PID controller for a robotic joint that's overshooting its target position, How do you decide between using ROS1 vs. ROS2 for a new project, and what trade-offs come with that choice?, What's your approach to calibrating a camera-to-robot coordinate transform (extrinsic calibration), and how do you validate it's correct?, How would you debug a robot that behaves correctly in simulation but fails or drifts when deployed on real hardware?, What's the difference between forward and inverse kinematics, and when would solving inverse kinematics become computationally difficult or ill-defined?, How do you handle latency or dropped messages between nodes in a distributed robotic system, especially for time-critical control loops?, How would you design a fallback/safety behavior for a robot that loses localization or sensor input mid-task?, How do you approach path planning in a dynamic environment where obstacles move (versus a static map)?

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