Java Interview Questions 🔥 | Top 80 Most Asked | Core Java, Spring Boot, Microservices | 1–10 Yrs

Crack your Java interview with confidence! 🚀 This video covers real Java interview questions and answers for experienced developers (3–8 years / 1–10 years), including Core Java, Java 8, Collections, Multithreading, Concurrency, Exception Handling, Spring Boot, Microservices, JPA, Hibernate, and backend development. These are the most frequently asked Java interview questions in top MNCs like Infosys, TCS, Wipro, Accenture, Capgemini, Cognizant, HCL, and Tech Mahindra, as well as product-based companies. Whether you’re preparing for a Java backend developer interview, a Spring Boot microservices interview, or revising Core Java concepts, this video will help you ace your interview. 💡 Why Watch This Video? ✔ Covers high-yield, frequently asked Java interview questions ✔ Focuses on Core Java, Java 8 features, Collections, Multithreading, Concurrency, and Exception Handling ✔ Includes Spring Boot, REST API, Microservices, Hibernate & JPA interview questions ✔ Ideal for backend developers, Java full-stack developers, and experienced Java professionals 🔥 Top Topics Covered 🔹 Core Java OOPs concepts Java 8 features Generics Collections Framework Exception Handling Immutable objects 🔹 Advanced Java Multithreading & Concurrency Thread lifecycle Executors framework Synchronization 🔹 Spring Boot & Microservices Dependency Injection Auto-configuration REST APIs Spring Boot microservices architecture 🔹 JPA / Hibernate Entity relationships LAZY vs EAGER loading Transactions ORM concepts 🔹 Exception Handling Custom exceptions Try-with-resources Exception propagation Finally block behavior ⏱️ Timestamps (Detailed Interview Questions) 0:00 What is JDK, JRE, JVM? 4:53 Class Loader in Java (with Example) 8:12 System.out.println Explained 10:04 public static void main Explained 12:39 Reading Config Server Values Without Restart 15:55 Fixing Memory Leak Problems 18:23 OOPs Concepts 21:28 throw vs throws 22:42 final vs finally vs finalize 23:30 == vs equals() 24:49 Why String is Immutable 26:42 HashMap Internal Working 29:32 HashMap vs ConcurrentHashMap 30:48 ArrayList vs LinkedList 31:50 Static Keyword (Variables, Methods, Blocks, Nested Classes) 32:47 Can We Override a Static Method? 33:05 Abstract Class vs Interface 34:25 Marker Interface 36:03 Transient Keyword 36:44 Comparable vs Comparator 38:00 Checked vs Unchecked Exceptions 40:43 Exception Propagation 40:54 Multiple Catch Blocks 41:38 Exception in finally Block 42:09 Can Constructor Throw Exception? 42:30 Custom Exception Creation 43:02 Try-with-Resources 44:05 Microservices & Exception Handling ✅ Official Resources 📘 Java Documentation https://docs.oracle.com/javase/ 🌱 Spring Boot Documentation https://spring.io/projects/spring-boot 🗄 Hibernate / JPA Documentation https://hibernate.org/orm/documentation/ 👍 Like, Subscribe & Hit the Bell 🔔 for more: Java interview preparation • Spring Boot tutorials • Microservices • Backend development • REST API interview questions • Java full-stack tips 👉 @mjbackend 📌 Hashtags (Optimized & Safe Count) #JavaInterviewQuestions #JavaInterviewQuestionsAndAnswers #CoreJavaInterview #Java8InterviewQuestions #JavaCollectionsInterview #MultithreadingInJava #JavaConcurrency #ExceptionHandlingInJava #SpringBootInterviewQuestions #JavaSpringBootInterview #SpringBootMicroservices #JavaMicroservices #JPAInterviewQuestions #HibernateInterviewQuestions #JavaBackendDeveloper #JavaFullStackInterview #MicroservicesArchitecture #RESTAPIInterviewQuestions #ExperiencedJavaDeveloper