Object class methods interview questions in java ? || Understand each method with example

array(10) { [0]=> object(stdClass)#5068 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "zSxhgzsJPD8" ["related_video_title"]=> string(69) "What New Features Were Added in Java 8 ? || Java 8 Interview Question" ["posted_time"]=> string(19) "5 лет назад" ["channelName"]=> string(16) "KK JavaTutorials" } [1]=> object(stdClass)#5041 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "dCt9sfZV8Sg" ["related_video_title"]=> string(49) "#58 Object Class equals toString hashcode in Java" ["posted_time"]=> string(21) "2 года назад" ["channelName"]=> string(7) "Telusko" } [2]=> object(stdClass)#5066 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "7k0VYHuUF6g" ["related_video_title"]=> string(99) "Internal Working and implementation of hashmap and hashset | Java Interview Questions | Code Decode" ["posted_time"]=> string(21) "3 года назад" ["channelName"]=> string(11) "Code Decode" } [3]=> object(stdClass)#5073 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "-_tPeb3VE6w" ["related_video_title"]=> string(97) "Spring Boot Interview Mastery | Question & Answer Guide for Developers | Part-1 | @Javatechie" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(11) "Java Techie" } [4]=> object(stdClass)#5052 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "khnair65cVc" ["related_video_title"]=> string(56) "What is Singleton Pattern in Java - How to achieve this?" ["posted_time"]=> string(28) "11 месяцев назад" ["channelName"]=> string(21) "Naveen AutomationLabs" } [5]=> object(stdClass)#5070 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "5oN4VctAfCk" ["related_video_title"]=> string(115) "Преемники Путина | Почему они все растворились (English subtitles) @Max_Katz" ["posted_time"]=> string(24) "20 часов назад" ["channelName"]=> string(19) "Максим Кац" } [6]=> object(stdClass)#5065 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "i-OZbcvneqo" ["related_video_title"]=> string(94) "Java String interview Questions and Answers with example| Immutable | Most Asked | Code Decode" ["posted_time"]=> string(21) "3 года назад" ["channelName"]=> string(11) "Code Decode" } [7]=> object(stdClass)#5075 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "blWdjRUPP6E" ["related_video_title"]=> string(72) "Разведчик о том, как использовать людей" ["posted_time"]=> string(22) "11 дней назад" ["channelName"]=> string(18) "Коллектив" } [8]=> object(stdClass)#5051 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "YbqneqDIZh8" ["related_video_title"]=> string(25) "#40 Encapsulation in Java" ["posted_time"]=> string(21) "2 года назад" ["channelName"]=> string(7) "Telusko" } [9]=> object(stdClass)#5069 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "RnHC1XiNWS8" ["related_video_title"]=> string(94) "Венедиктов – страх, Симоньян, компромиссы / вДудь" ["posted_time"]=> string(21) "1 день назад" ["channelName"]=> string(10) "вДудь" } }