Given:

and the code fragment:

Which two code fragments, when inserted at line n1 independently, enable the code to print TruckCarBike?

Given:
Class A { }
Class B { }
Interface X { }
Interface Y { }
Which two definitions of class C are valid?

Given:

and the code fragment:

Which modification enables the code fragment to print Speaker?

Given the code fragment:
public class Foo {
public static void main (String [ ] args) {
Map<Integer, String> unsortMap = new HashMap< > ( );
unsortMap.put (10, "z");
unsortMap.put (5, "b");
unsortMap.put (1, "d");
unsortMap.put (7, "e");
unsortMap.put (50, "j");
Map<Integer, String> treeMap = new TreeMap <Integer, String> (new
Comparator<Integer> ( ) {
@Override public int compare (Integer o1, Integer o2) {return o2.compareTo
(o1); } } );
treeMap.putAll (unsortMap);
for (Map.Entry<Integer, String> entry : treeMap.entrySet () ) {
System.out.print (entry.getValue () + " ");
}
}
}
What is the result?

Which action can be used to load a database driver by using JDBC3.0?