Do This Before Your Java Interview : Nail These 25 Interview Questions

Video Description

For your personal AI interview expert and programming coach, visit: https://www.learnthatstack.com Get interview-ready fast with 25 must-know Java interview questions every backend developer should master. In this concise, practical walkthrough, we cover core topics and real interview traps: JDK vs JRE vs JVM, primitives vs references, autoboxing/unboxing pitfalls, == vs equals & hashCode, String vs StringBuilder vs StringBuffer, access modifiers, static vs instance, and the four pillars of OOP. You’ll also review super, ArrayList vs LinkedList performance, checked vs unchecked exceptions, the exception hierarchy, throw vs throws, multi-catch & finally, processes vs threads, creating threads with Runnable/Callable/Executor, start() vs run(), stack vs heap, byte vs character streams, Spring Boot (auto-config, starters, Actuator), Spring stereotypes (@Component/@Service/@Repository/@Controller), @RestController vs @Controller, JDBC (DriverManager, PreparedStatement), and testing fundamentals (JUnit 5, TestNG, Mockito, AssertJ, Spring Boot Test, Testcontainers). Whether you’re a fresher, mid-level, or senior Java developer, this video gives crisp explanations, pro tips, and analogies to boost confidence and help you ace your next Java backend interview. Watch till the end to solidify concepts and avoid common mistakes! Chapters: 0:00 - 0:23 - Intro 0:24 - 01:39 - JDK vs JRE vs JVM 01:40 - 03:01 - Primitive vs Reference Types 03:02 - 04:11 - Autoboxing and Unboxing 04:12 - 05:31 - == vs Equals 05:32 - 06:48 - String vs StringBuilder vs StringBuffer 06:49 - 07:59 - Access Modifiers 08:00 - 09:25 - Static vs Instance Members 09:26 - 10:47 - Four pillars of OOP 10:48 - 12:00 - The Super keyword 12:01 - 13:21 - ArrayList vs LinkedList 13:22 - 14:37 - Checked vs Unchecked exceptions 14:38 - 15:58 - Java Exception Hierarchy 15:59 - 17:19 - throw vs throws 17:20 - 18:28 - Multiple catch blocks 18:29 - 19:42 - Process vs thread 19:43 - 20:49 - Creating threads in Java 20:50 - 22:06 - start() vs run() 22:07 - 23:18 - stack vs heap memory 23:19 - 24:40 - byte stream vs character stream 24:41 - 25:58 - spring boot advantages 25:59 - 27:33 - Spring streotype annotations 27:34 - 29:06 - @RestController vs @Controller 29:07 - 30:46 - JDBC Architecture 30:47 - 32:23 - Unit vs Integration testing 32:24 - 33:22 - Java Testing Ecosystem 33:23 - 33:36 - Outro Watch other interview videos from LearnThatStack: https://youtu.be/87LrkuXayds https://youtu.be/-a-QdllyUl4 https://youtu.be/Fu-qXQS3rSo https://youtu.be/FTzVa-FINFo https://youtu.be/L_ix9nlAtM4 https://youtu.be/EmRymL_LpEw https://youtu.be/zHN99Nl1zmM https://youtu.be/qPtGs-RPLzg