What happens if you insert the eleventh element into an ArrayList that already contains ten elements?

If an eleventh element is inserted into an ArrayList that already contains ten elements, the ArrayList will automatically increase its internal array to accommodate the new element. Unlike a regular array, ArrayList dynamically expands when elements are added beyond its current capacity. Typically, the following occurs:

1. A new array with increased capacity (usually about 1.5-2 times larger than the current one) is created.
2. Existing elements are copied into the new array.
3. The new element is added at the end.

Thus, inserting the eleventh element will not cause an error but will trigger an automatic expansion of the internal storage.