1Z0-851 exam study guide

Oracle Java Standard Edition 6 Programmer Certified Professional Exam 1Z0-851
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
One year free update
Once failed,100% refund
Questions and Answers : 290Q&As
Update Time : 2013-8-8
Price :$79.00

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Free 1Z0-851 Demo Download
public class Person {
private name;
public Person(String name) {
this.name = name;
public int hashCode() {
return 420;
Which statement is true?
A. The time to find the value from HashMap with a Person key depends on the size of the map.
B. Deleting a Person key from a HashMap will delete all map entries for all keys of type Person.
C. Inserting a second Person object into a HashSet will cause the first Person object to be removed as a
D. The time to determine whether a Person object is contained in a HashSet is constant and does NOT
depend on the size of the map.
Answer: A

import java.util.*;
public class SortOf {
public static void main(String[] args) {
ArrayList<Integer> a = new ArrayList<Integer>();
a.add(1); a.add(5); a.add(3);
What is the result?
A. [1, 2, 3, 5]
B. [2, 1, 3, 5]
C. [2, 5, 3, 1]
D. [5, 3, 2, 1]
E. [1, 3, 5, 2]
F. Compilation fails.
G. An exception is thrown at runtime.
Answer: C