Java Full Stack Developer Interview Questions

1,046 java full stack developer interview questions shared by candidates

1. Architecture of latest project that i worked (keep it crisp and clean) 2. Sql problem statement 3. To define a java class to remove duplicate data with respect to users preferably like collections and string something like set 4. Core concepts of agile, git commands Good to have knowledge on data structures but not mandator
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Full Stack Java Developer

Interviewed at Deloitte

3.6
Feb 27, 2025

1. Architecture of latest project that i worked (keep it crisp and clean) 2. Sql problem statement 3. To define a java class to remove duplicate data with respect to users preferably like collections and string something like set 4. Core concepts of agile, git commands Good to have knowledge on data structures but not mandator

Java Side: 1. Difference between RequestMapping and other Mappings? 2. Java 8 features 3. One small technical problem (String manipulation) 4. Qualifier annotation 5. Why notify, notifyAll, wait are outside functions in thread. etc React Side: 1. Lifecycle 2. Hooks 3. Keys 4. Mapping 5. Controlled and uncontrolled components etc The interview was like this. Only they are asking what's in the book.
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Java Full Stack Developer

Interviewed at Tech Mahindra

3.4
Oct 2, 2025

Java Side: 1. Difference between RequestMapping and other Mappings? 2. Java 8 features 3. One small technical problem (String manipulation) 4. Qualifier annotation 5. Why notify, notifyAll, wait are outside functions in thread. etc React Side: 1. Lifecycle 2. Hooks 3. Keys 4. Mapping 5. Controlled and uncontrolled components etc The interview was like this. Only they are asking what's in the book.

1st round: DSA was easy with Java being the only available platform (one was a pattern printing question, and the other was a LC easy Arrays question. MCQs had questions on SQL, React and Spring. 2nd round interview: Streams, consumer classes, lambda functions, multithreading.
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Full Stack Java Developer

Interviewed at HiLabs

3.3
Jan 4, 2023

1st round: DSA was easy with Java being the only available platform (one was a pattern printing question, and the other was a LC easy Arrays question. MCQs had questions on SQL, React and Spring. 2nd round interview: Streams, consumer classes, lambda functions, multithreading.

L1-Technical Round: Static method can be override? Static method can be overloaded? ECMA means? Which is latest ECMA version being used and new features introduce? Arraylist v/s Hashset, Which will perform fast and provide time complexity? contain() v/s compareTo() methods in collections? How hashset works internally, what have changed in java-8? Exception handling in java project Various types of Directives in angular Expressions in angular What all way you communicate with other components, give your opinion on same? AOT in angular? Multithreading handson, if any? Testing frameworks have you used any & which one use for angular? Scenario: you have dropdown list based on some condition want to populate grid data, How will you design end to end? Coding question: Find duplicate elements in array, How to remove same?
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Java Full Stack Developer

Interviewed at Capco

3.8
Jan 28, 2021

L1-Technical Round: Static method can be override? Static method can be overloaded? ECMA means? Which is latest ECMA version being used and new features introduce? Arraylist v/s Hashset, Which will perform fast and provide time complexity? contain() v/s compareTo() methods in collections? How hashset works internally, what have changed in java-8? Exception handling in java project Various types of Directives in angular Expressions in angular What all way you communicate with other components, give your opinion on same? AOT in angular? Multithreading handson, if any? Testing frameworks have you used any & which one use for angular? Scenario: you have dropdown list based on some condition want to populate grid data, How will you design end to end? Coding question: Find duplicate elements in array, How to remove same?

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