A Generic Class With Two Type Parameters2785 - Java Quiz Question

Which of the following is incorrect statement regarding the use of generics and parameterized types in Java?

When designing your own collections class (say, a linked list), generics and parameterized types allow you to achieve type safety with just a single class definition as opposed to defining multiple classes.
Generics provide type safety by shifting more type checking responsibilities to the compiler.
Generics and parameterized types eliminate the need for down casts when using Java Collections.
All of the mentioned