Robots that run by themselves without human control must utilize ________.

• A. Optical shaft encoders
• B. A holonomic drive
• C. Transmitter and micro-switches
• D. A microcontroller and autonomous programming

Answer: (D)

To run by itself, a robot needs an onboard control system that can process information and command the motors without human input. A microcontroller with autonomous programming provides exactly that: it runs code stored on the robot, reads sensors, makes decisions, and drives the motors to carry out tasks independently. The other options describe useful parts of a robot but don’t supply the decision-making capability needed for true autonomous operation: optical shaft encoders give feedback on rotation but don’t control actions by themselves; a holonomic drive is about motion capability, not autonomy; transmitter and micro-switches can enable remote control or simple sensing but don’t provide the autonomous processing brain.