QUESTION 25

QUESTION 25 
Given: 
 
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 duplicate. 
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. 
 
Solution : A 

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plus imformation

when use to Hashmap class in java 

1. A HashMap contains values based on the key.

2.It contains only unique elements.

3.It may have one null key and multiple null values.

4.It maintains no order.

https://www.javatpoint.com/java-hashmap