Java Generics Interview Questions

Which syntax is used for a generic type that can accept Integer or its supertypes?

What will this code print?

class Box<T> {
    T value;
    Box(T value) { this.value = value; }
    T get() { return value; }
}
public class Test {
    public static void main(String[] args) {
        Box<String> b = new Box<>("Java");
        System.out.println(b.get());
    }
}

How does Java implement generics internally?

Which of the following correctly declares a generic class with two type parameters?