itrenzheng网1Z0-851必威体育精装版题库.pdf

The safer , easier way to help you pass any IT exams. Exam : 1Z0-851 Title : Java Standard Edition 6 Programmer Certified Professional Exam Version : Demo 1 / 16 The safer , easier way to help you pass any IT exams. 1.Given a pre-generics implementation of a method: 11. public static int sum(List list) { 12. int sum = 0; 13. for ( Iterator iter = list.iterator(); iter.hasNext(); ) { 14. int i = ((Integer)iter.next()).intValue(); 15. sum += i; 16. } 17. return sum; 18. } What three changes allow the class to be used with generics and avoid an unchecked warning? (Choose three.) A. Remove line 14. B. Replace line 14 with int i = iter.next();. C. Replace line 13 with for (int i : intList) {. D. Replace line 13 with for (Iterator iter : intList) {. E. Replace the method declaration with sum(Listint intList). F. Replace the method declaration with sum(ListInteger intList). Answer: A,C,F 2.A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add(0, object), but does NOT need to support quick random access. What supports these requirements.? A. java.util.Queue B. java.util.ArrayList C. java.util.LinearList D. java.util.LinkedList Answer: D 3.Given: 11. // insert code here 12. private N min, max; 13. public N getMin() { return min; } 14. public N getMax() { return max; } 15. public void add(N added) { 16. if (min == null || added.doubleValue() min.doubleValue()) 17. min = added; 18. if (max == null || added.doubleValue() max.doubleValue()) 19. max = added; 20. } 21. } Which two, inserted at line 11, will allow the code to compile? (Choose two. )A. public class MinMax? { 2 / 16