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Junior Java Developer Interview Questions

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3,831 junior java developer interview questions shared by candidates

N/A Brief project introduction 2. Why do we use Springboot? What are the advantages of Springboot over Spring MVC? 3.Spring MVC flow. 4. Why Microservice? Advantages of microservice. 5. Arraylist , linkedlist , iterators 6. Hashmap and it's internal implementation. 7. Difference between ABSTRACT CLASS AND INTERFACE 8. Difference between method overloading and overrriding.
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Junior Java Developer

Interviewed at Accenture

3.7★
Apr 12, 2022

N/A Brief project introduction 2. Why do we use Springboot? What are the advantages of Springboot over Spring MVC? 3.Spring MVC flow. 4. Why Microservice? Advantages of microservice. 5. Arraylist , linkedlist , iterators 6. Hashmap and it's internal implementation. 7. Difference between ABSTRACT CLASS AND INTERFACE 8. Difference between method overloading and overrriding.

1st Round : He asked almost every concept from java spring and coding 1 . internal implementation of HashMap 2 . Implementation of LRU cache 3 . what is inversion of control 4 . What is Transactional annotation , he defined two defined method1 and method2 and written @transactional annotation on method2 and written 4 queries inside method2 and if exception occurred at execution of query2 then in this case query 1 will rollback or not 5 . what is IOC container ? 6 . A database query based on group by 7 . How to find latecy in API 8 . Types of Microservices
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Jr. Java developer

Interviewed at CARS24.com

4.3★
Oct 17, 2023

1st Round : He asked almost every concept from java spring and coding 1 . internal implementation of HashMap 2 . Implementation of LRU cache 3 . what is inversion of control 4 . What is Transactional annotation , he defined two defined method1 and method2 and written @transactional annotation on method2 and written 4 queries inside method2 and if exception occurred at execution of query2 then in this case query 1 will rollback or not 5 . what is IOC container ? 6 . A database query based on group by 7 . How to find latecy in API 8 . Types of Microservices

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