JavaTpoint
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Question 1: import java.util.*;
public class Explorer3 {
public static void main(String[] args) {
TreeSet<Integer> s = new TreeSet<Integer>();
TreeSet<Integer> subs = new TreeSet<Integer>();
for(int i = 606; i < 613; i++)
if(i%2 == 0) s.add(i);
subs = (TreeSet)s.subSet(608, true, 611, true);
subs.add(629);
System.out.println(s + " " + subs);
}
}

What is the result?
1. [606, 608, 610, 612, 629] [608, 610]
2. An exception is thrown at runtime.
3. [608, 610, 612, 629] [608, 610]
4. [608, 610, 612, 629] [608, 610, 629]