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READ Free Dumps For Oracle- 1z0-851





Question ID 3657

Given:
1.    public class Score implements Comparable<Score> {
2.    private int wins, losses;
3.    public Score(int w, int l) { wins = w; losses = l; }
4.    public int getWins() { return wins; }
5.    public int getLosses() { return losses; }
6. public String toString() {
7. return "<" + wins + "," + losses + ">";
8. }
9. // insert code here
10. }
Which method will complete this class?
 

Option A

A.    public int compareTo(Object o){/*more code here*/}
 

Option B

B.    public int compareTo(Score other){/*more code here*/}
 

Option C

C.    public int compare(Score s1,Score s2){/*more code here*/}
 

Option D

D.    public int compare(Object o1,Object o2){/*more code here*/}
 

Correct Answer B
Explanation


Question ID 3658

Given:
11. public class Person {
12. private name;
13. public Person(String name) {
14. this.name = name;
15. }
16. public int hashCode() {
17. return 420;
18. }
19. }
Which statement is true?

 

Option A

A.    The time to find the value from HashMap with a Person key depends on the size of the map.
 

Option B

B.    Deleting a Person key from a HashMap will delete all map entries for all keys of type Person.
 

Option C

C.    Inserting a second Person object into a HashSet will cause the first Person object to be
removed as a duplicate.
 

Option D

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.

Correct Answer A
Explanation

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