What are true properties of Java ArrayLists.

Question $2$ options:

There are built$-$in methods for things like contains$($Object o$).$

The default size is $0$

When initialized it is filled with a default value $($depending on its type$).$

You can store object types.

You can change their size.

You can store primitive types.

There is a helper library with extra methods to help you do operations.

You can slice them, like in python, with $[]$ syntax to get a subsequence$$of$$the$$array$.$