Which of the following is true?
A) All hashing algorithms give different hash codes to different objects,and the same hash code to equal objects
B) A hash code of a Number object may be a float,an int,or a double
C) Any application that overrides the Object hashCode method should also override the equals method
D) Any application that overrides the Object equals method should also override the hashCode method

Question

Quizplus · Accepted Answer

If an application overrides the equals method, it changes the underlying definition of object equality. Therefore, the application must also override the hashCode method to ensure that two equal objects have the same hash code. This is because the hashCode method is used by data structures such as HashMap and HashSet to locate objects quickly. If two objects with different hash codes are considered equal, it could lead to inconsistencies in the behavior of these data structures.

Which of the Following Is True