Question

What happens if we put a key object in a HashMap which exists? (a) The new object replaces the older object (b) The new object is discarded (c) The old object is removed from the map (d) It throws an exception as the key already exists in the map The question was asked during a job interview. This intriguing question originated from Data Structures-HashMap in section java.util – The Collections Framework of Java Select the correct answer from above options Java questions and answers, Java questions pdf, Java question bank, Java questions and answers pdf, mcq on Java pdf, Java questions and solutions, Java mcq Test , Interview Java questions, Java Questions for Interview, Java MCQ (Multiple Choice Questions),Core Java Questions, Core Java MCQ,core java interview questions for experiencedcore java interview questions for 3 years experience,java programming questions,core java interview questions for freshers,java interview questions and answers for freshers, java programming questions and answers pdf, java interview questions for beginners

Answer 1

Correct answer is (a) The new object replaces the older object To explain I would say: HashMap always contains unique keys. If same key is inserted again, the new object replaces the previous object.