Review Questions

Which of these methods can be called on objects implementing the Map interface?

Select the two correct answers.

Which statements are true about maps?

Select the two correct answers.

Which sequence of digits will the following program print?

import java.util.*;
public class Lists {
    public static void main(String[] args) {
        List list = new ArrayList();
        list.add("1");
        list.add("2");
        list.add(1, "3");
        List list2 = new LinkedList(list);
        list.addAll(list2);
        list2 = list.subList(2, 5);
        list2.clear();
        System.out.println(list);
    }
}

Select the one correct answer.

Which of these classes have a comparator() method?

Select the two correct answers.

Which method prototypes are defined in the interface java.util.Map.Entry?

Select the two correct answers.