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Full Stack Java Developer Interview Questions

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1,048 full stack java developer interview questions shared by candidates

React & JS 1. Given 1 URL that data need to render in table format, while coding ask few question what is hook, useState, useEffect, debug the code analysis the styling and change it. 2. Closure, Hoisting in js 3. Let say you are CEO if huge E-commerce application as a CEO what kind of this you want to see when you have only 10 minutes to see. 4. LinkedList, Stack, Queue Java 1. HashMap working internal, Linked HashMap vs HashMap. 2. Design LLD for Parking Lot 3. Advantage of Spring Bean over manual creation of bean. 4. Give some situation and ask what kind of Data structure you use.
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Full Stack Engineer - Java and React JS

Interviewed at Apple

4.2★
Jun 7, 2025

React & JS 1. Given 1 URL that data need to render in table format, while coding ask few question what is hook, useState, useEffect, debug the code analysis the styling and change it. 2. Closure, Hoisting in js 3. Let say you are CEO if huge E-commerce application as a CEO what kind of this you want to see when you have only 10 minutes to see. 4. LinkedList, Stack, Queue Java 1. HashMap working internal, Linked HashMap vs HashMap. 2. Design LLD for Parking Lot 3. Advantage of Spring Bean over manual creation of bean. 4. Give some situation and ask what kind of Data structure you use.

Steam api vs collection How to connect different microservices Communicate microservices Oauth token React asynchronous call How to implement caching Soap vs rest What is state management in react Spring boot how to develop, test , deploy. What is distributed transaction How to optimize docker images
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Java Full Stack Developer

Interviewed at Coforge

3.7★
Aug 1, 2025

Steam api vs collection How to connect different microservices Communicate microservices Oauth token React asynchronous call How to implement caching Soap vs rest What is state management in react Spring boot how to develop, test , deploy. What is distributed transaction How to optimize docker images

stream api ->diference flatMap and map in stream explain try with resources Busy spinning Builder pattern Concurrent utilities different types class loaders Tree map -> how to add employee object other than put method How will treemap sort emplyee object
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Full Stack Java Developer

Interviewed at Synechron

4.2★
Jun 8, 2021

stream api ->diference flatMap and map in stream explain try with resources Busy spinning Builder pattern Concurrent utilities different types class loaders Tree map -> how to add employee object other than put method How will treemap sort emplyee object

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