Question L6-C1

The question is about the analysis of a cleaning robot path, and the implications on the working mechanisms. On the right there is an illustration of the path of the robot, where the robot follows parallel lines but making a back and forth movement used to clean the ground in the most effective way. It's important to see that there is a general very regular path on which is superposed a pattern back and forth with lateral movement used to clean. The question is: "This picture shows, in light blue, the full trajectory of a vaccum cleaning robot cleaning a room. Which statements are correct with respect to this robot? (several answers possible)". Three statements are proposed:

Statement A. is "This robot needs memory to store the map of the environment". This statements is correct, as this robot needs a map to make a regular path like the one in the image. Note that the path seems irregular because of the movement of the robot among the path, but once this pattern is seen, one can extract the path which is very regular.
In the explanation of the student we would like to see that they understand that there is a regular path here that can be achieved only by knowing the map and navigating into it.

Statement B. is "The robot localises itself". This statements is also correct, as this robot needs to localise itself to make a regular path like the one in the image. Note that the path seems irregular because of the movement of the robot among the path, but once this pattern is seen, one can extract the path which is very regular.
In the explanation of the student we would like to see that they understand that there is a regular path here that can be achieved only by having a robot localisation.

Statement C. is "The robot can detect features in the environment" This statements is correct, as this robot needs to detect features in the environment to localise itself and make a regular path like the one in the image. Note that the path seems irregular because of the movement of the robot among the path, but once this pattern is seen, one can extract the path which is very regular.
In the explanation of the student we would like to see that they understand that there is a regular path here that can be achieved only by detecting features in the environment, that allow to localise the robot and make the path we observe in the picture.

In short all three statements are correct.
