Table scrolling is only visible when needed. While horizontal scrolling will be visible when the table is wider than the available space, vertical scrolling will only be visible if the table is given a Height or Max-Height that is less that the overall height of the table itself.
A) No Scrollbars
If no Height or Max-Height is given to the table then all table rows will flow down the page and vertical scrollbars will never be visible.
If a Height or Max-Height that is less that the height of the table is given, vertical scrollbars will appear.