What does end-effector pose refer to?

• A. The speed and acceleration of the end-effector
• B. The color and texture of the end-effector
• C. The material of the end-effector
• D. The position and orientation of the end-effector in space

Answer: (D)

End-effector pose is the spatial configuration of the robot’s end-effector—the position and orientation of the tool or hand in three-dimensional space. It tells you where the end-effector is located and how it is rotated, usually described relative to a fixed reference frame using a position plus orientation (for example, x, y, z with roll, pitch, yaw or a transformation matrix/quaternion). This information is what you need for precise manipulation, such as grasping or placing a part, because both where the tool is and how it’s facing determine whether the task can be executed correctly. The other aspects mentioned—speed and acceleration, color and texture, and material—describe motion state or physical appearance, not the actual location and orientation in space.