Java Interview Question - Why Immutable Class is "Final" ? | Can We Use Custom Key With HashMap ?

In this series, I attempt to answer the "top" frequently asked interview questions, at least according to Companies. I answer to the questions based upon experiences. ----------------------------------------------------------------- Top Courses : =========== 1) Spring Core Framework - https://www.youtube.com/watch?v=LuU5NElxc20&list=PL5mjp3QjkuoJUHnpmlfpguY2n5fJPqGSu 2) Spring Boot - https://www.youtube.com/watch?v=uzbB1UO6L4g&list=PL5mjp3QjkuoLPS-L28yKCKyzCMX8WRVno 3) Spring Security - https://www.youtube.com/watch?v=Dxlg1rxJn9k&list=PL5mjp3QjkuoIYOqnUtWl1K91Fg7O_p7QX 4) Spring MVC - https://www.youtube.com/watch?v=juuZDge9dUI&list=PL5mjp3QjkuoKWvRr8kiajAcP5b6ZVTw6Q 5) Spring MVC Project Series - https://www.youtube.com/watch?v=DYMj8B3cVZI&list=PL5mjp3QjkuoKZ0CKox-o0ag9WAft7m_kc 6) Design Pattern - https://www.youtube.com/watch?v=a5GMYRG8J90&list=PL5mjp3QjkuoI1BNhruPFUHhAAkA9rISiV 7) Docker Tutorial - https://www.youtube.com/watch?v=IcWUOvxMdAc&list=PL5mjp3QjkuoKn8R4MjwfWZm1XY7mdw8Tx 8) Java 8 - https://www.youtube.com/watch?v=ynM4gk_Nhtg&list=PL5mjp3QjkuoLSUXGu8STyrm-yrh9xi54h 9) Java Collection Framework - https://www.youtube.com/watch?v=WYjxcaurYH0&list=PL5mjp3QjkuoJfJt_ofy6IXn73dpyW1OD5 10 ) Java Interview Question & Answer - https://www.youtube.com/watch?v=sQclNikTjwI&list=PL5mjp3QjkuoK_PrdUIVBP7i8CqFPvwmBW 11) SQL Interview Question & Answer - https://www.youtube.com/watch?v=dR2fOw_DRiE&list=PL5mjp3QjkuoLk46ELjdzLePMb1hUkDJHg 12) Python Tutorial - https://www.youtube.com/watch?v=SBf306OGgnw&list=PL5mjp3QjkuoJOia44h5-RFpgVfPgv7K7W 13) SQL Server Tutorial - https://www.youtube.com/watch?v=ttXlzoqdy4c&list=PL5mjp3QjkuoKqkwLbPidQo4P1_LmJ7CvH 14) OOPs Concepts - https://www.youtube.com/watch?v=RjYMH_7SPyc&list=PL5mjp3QjkuoK-bB4OXA8xlPYTqJiPjOUW 15) Coding Interview - https://www.youtube.com/watch?v=p1vn15SSTtE&list=PL5mjp3QjkuoJvBWwaRcK9BJpuzQPjcDmO 16) Spring AOP - https://www.youtube.com/watch?v=9Y5-q0DvhRA&list=PL5mjp3QjkuoLQyAmAYgSALsDDHmjyLxbC 17) Spring REST API - https://www.youtube.com/watch?v=YraZb4j4uJU&list=PL5mjp3QjkuoKUfIUV5OG_AmQXMIK4mtfz 18) Java Multithreading - https://www.youtube.com/watch?v=tZJ9riIv5LY&list=PL5mjp3QjkuoLARSdFVi6gfJrmxN3KuInC ------------------------------------------------------- Important Links : ================= For Support : http://paypal.me/progrank Github Link (Source Code): https://github.com/Ankit-Er/youtubechannel Telegram Link for Discussion : https://t.me/progrank Follow on Instagram : https://www.instagram.com/progrank/ Follow on Facebook : https://www.facebook.com/ProgRank ------------------------------------------------------- DSLR FOR VIDEO RECORDING - https://amzn.to/2YqiC0H MIC FOR VOICE RECORDING - https://amzn.to/3pIg364 https://amzn.to/3ouMQu4 ALL PLAYLIST : ============= https://www.youtube.com/c/ProgRank/playlists --------------------------------------------------------------- #ImmutableClassFinal #WhyImmutableClassFinal #ImmutableObject #Java #InterviewQuestions #CodingInterviewQuestions #JavaInterviewQuestions #JavaCodingInterview #QuestionsAndAnswers #JavaQuestions #JavaTutorial #JavaInterviewPreparations #Immutable #Class #Insights Java Interview Questions and Answers in Hindi,Java Interview Questions and Answers,Java Tutorial,Java Training,java interview questions,java interview question and answer,java interview questions coding,core java interview questions and answers,Java Interview Questions and Answers in Hindi,immutable classes in java,immutable class with mutable object in java,immutable class in java example,immutable class with mutable reference,immutable class interview questions,immutable class creation in java,immutable class java,immutable class and object,immutable class constructor java,immutable class creation,immutable class create,immutable class clone method,immutable class design pattern,immutable class example,immutable class having mutable reference,immutable class in java,immutable class java example,java immutable class interview questions,immutable class rules in java,immutable class vs immutable object,immutable class vs final class,immutable class with setter