Front-end and back-end questions were asked. Java Servlets, Concurrent API, Java APIs in general, how to handle deadlock and multithreading. Questions about Service-oriented Architecture (SOA), Microservices and JAX-WS with XML. What is the difference between RESTful and SOAP-based web services in Java?
What is functional interface in java
For a Hashmap , filter out keys and values using lambda and stream API
What are some of the difficult things that you worked on?
What is Default Scoping in Spring?
What are resolvers and interceptors
Can we use multiple database? How? Explain with an example.
What is synchronization in java?
L2-Technical Round: Stackoverflow Exception and options to avoid same.? ECMA means? Which is latest ECMA version being used and new features introduce? Spread operator in JavaScript? Frequently used external library in es6 in your angular project? Design patterns used in your project & use cases Angular Lifecycle Hooks? Rxjs library, Its usage? Session Management in Angular using external library(if any worked on) Security in angular AOT in angular? Module in angular Microservices in spring boot Custom Exception handling in spring boot Multithreading hands-on, if any? Java 8 new features What does annotation means to you, why it was introduce in all modern programming lang.? Scenario: Want to design Menu sidebar using Ajax call, How will you do it?
Core Java and Java 8 What is the difference between ArrayList and LinkedList? When would you use one over the other? Explain the concept of functional interfaces in Java 8. Can you name a few built-in functional interfaces? How does the Stream API work in Java 8? Write a code snippet to filter a list of integers and find the sum of even numbers. Collection Framework How does a HashMap work internally? What happens if two keys have the same hash code? What is the difference between HashSet and TreeSet? How does TreeSet maintain order? Spring Boot What is dependency injection in Spring Boot? How does it help in building loosely coupled applications? How do you handle exceptions globally in a Spring Boot application? Explain the use of @ControllerAdvice. Microservices What are the key differences between monolithic and microservices architecture? What challenges do microservices solve? How do microservices communicate with each other? Explain the use of REST APIs and messaging queues. Design Patterns Explain the Singleton design pattern. How can you implement a thread-safe Singleton in Java?
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