Question

true or fals: an object can move for 10 seconds and still have zero displacement?

Answer 1

false if it is moving ahead and did not come to that point from where it has been moved.

true if object has come to the same point from where the object has moved..

Answer 2

That's true.  Displacement is measured between the start-point and
end-point, regardless of the route that's followed.  So, for example,
the displacement of an object that's moving in a circle becomes zero
every time the object returns to the point on the circle where it started.