Attended 6 rounds. Java 8, Spring Boot, Microservices along with design patterns. These are the main area of focus in interviews. And mainly they will expect to write a program using java streams. So we should be good at Java 8 stream api's.
Java Senior Interview Questions
6,021 java senior interview questions shared by candidates
Java 8 stream API..java exceptions..data structures..microservices..springboot
Tell me about yourself. Past projects
1. Explain Collection framework in Java? 2. Java 8 Features 3. Sorting array elements ( Based on Comparator & Comparable) 4. OOP Concepts 5. Array List vs Linked List 6. Sort map by value 7. Internal Working of HashMap 8. Serialization 9. map() vs flatmap() 10. Add elements of List of List using Steam API 11. IOC & Depenedncy Injection 12. What is profiles and actuators in Spring Boot? 13. @Controller vs @RestController 14. @Bean vs @Component 15. Explain Auto configuration and Dependency management feature in Spring Boot 16. Get nth highest salary from employee table
What types of GC do you know? Draw the chart with main GC performance attributes and place these GC's on the chart.
Hashmap working
1) Java 11, 17, and 21 features. 2) What is the use of Optional? 3) What are intermediate and terminal operations? 4) In an interface, what is the purpose of default and static methods? 5) What is the Builder pattern? 6) How do you create an immutable class? 7) How do you share requests from one microservice to another? 8) Write a program to find the 2nd largest numbers in an unsorted array without using an inbuilt sort function. 9) How can we restrict a list from being modified? 10) What is transient? 11) What is volatile? 12) put vs patch ?
No difficult questions
Which are the steps you do if an application runs slowly?
How would you design a scalable and thread-safe service to handle high-concurrency transactions in a Spring Boot microservices architecture?
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