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1,051 full stack java developer interview questions shared by candidates

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 ?
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Senior Java Full Stack Engineer

Interviewed at CRISIL

3.8★
Jul 11, 2025

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 ?

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?
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Java Full Stack Developer

Interviewed at Capco

3.8★
Jan 28, 2021

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?

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