Question

Here is the API for a robot library. // moves the robot forward function moveForward(); // turns the robot to the left function rotateLeft(); // turns the robot to the right function rotateRight(); // checks if a robot can move in any direction // direction {string} - the direction to be checked // return {Boolean} - true if the robot can move in that direction, otherwise returns false function canMove(direction); Which code segment will guarantee that the robot makes it to the gray square without hitting a wall or a barrier (black square)

Answer 1

Answer:

Option (A)

Explanation:

See attachment for options

From the options, the code segment of option (A) answers the question and the explanation is as follows:

I added a second attachment which illustrates the movement

function (solveMaze) {

moveForward(); ---- The robot moves up (to position 1)

moveForward(); ---- The robot moves up (to position 2)

rotateRight(); ---- The robot changes where it faces (however, it is still at position 2)

while(canMove("forward")) { moveForward(); } ---- This is repeated until the robot reaches the end of the grid (i.e. position 3 and 4)

rotateLeft(); ---- The robot changes where it faces (however, it is still at position 4)

moveForward(); ---- The robot moves up to the gray square