DevGenius
blog.devgenius.io › java-8-coding-and-programming-interview-questions-and-answers-62512c44f062
Java 8 Coding and Programming Interview Questions and Answers | by Anusha SP | Dev Genius
May 20, 2025 - Please bookmark this page as I will keep adding more questions to it. Given a list of integers, find out all the even numbers that exist in the list using Stream functions? import java.util.*; import java.util.stream.*; public class EvenNumber{ public static void main(String args[]) { List<Integer> list = Arrays.asList(10,15,8,49,25,98,32); list.stream() .filter(n -> n%2 == 0) .forEach(System.out::println); /* or can also try below method */ /* When numbers are given as Array int[] arr = {10,15,8,49,25,98,32}; */ Map<Boolean, List<Integer>> list = Arrays.stream(arr).boxed() .collect(Collectors.partitioningBy(num -> num % 2 == 0)); System.out.println(list); } } Output: 10, 8, 98, 32
GitHub
github.com › Ruptam › java-8-stream-api-coding-interview-question
GitHub - Ruptam/java-8-stream-api-coding-interview-question: Conding questions of stream API for interview · GitHub
List<String> deptNamesList = empList.stream() .map(emp -> emp.getDepartmentName()).collect(Collectors.toList());
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Does anyone have any stream based interview questions I can use to prepare?
There aré a lot of excercises here: https://github.com/stuart-marks/LambdaHOLv2 More on reddit.com
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February 17, 2021Java interview questions
How does pattern matching for instanceof simplify Java code? How do you implement immutability in Java classes? What are the benefits of using streams and functional programming in Java? How does Java handle memory management for unreachable objects? I've been a developer for over 10 years, mostly backend java, and I can only answer 7, 8, and 10. Am I right in thinking that these types of questions ... More on reddit.com
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November 21, 2025Top 50 Java 8 Stream, Lambda, and Functional Programming Interview Questions
Good one ☝️ More on reddit.com
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June 8, 2023Are java streams not allowed in interviews?
Depends on the interviewer. A couple reasons come to mind: Interviewer doesn't understand them. I work at a Java shop and you'd be surprised how many people here don't know what streams, lambdas, functional programming, etc... are. They've been here forever and still live like it's Java 7. And honestly that's fine in terms of delivering product so there's no push to change. So interviewers just tell you not to use them because they don't understand what you're doing. A stream doesn't demonstrate the knowledge they're looking for. For example I ask you to sort an array, I don't want you to write "array.sort()". I want you to think about the input and write the appropriate algorithm for it using more basic building blocks. Many interviews are sort of depth first searches on your knowledge. They'll ask you to do something. Then give you a variation to solve. Then maybe they'll keep changing it, or probing your knowledge, to see how deeply you understand the problem area. It could be that using streams passed their first check and now they want to see what else you know. More on reddit.com
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March 12, 2022Videos
Java Concept Of The Day
javaconceptoftheday.com › home › java 8 interview sample coding questions
Java 8 Interview Sample Coding Questions
March 6, 2025 - 2) How do you remove duplicate elements from a list using Java 8 streams?
InterviewBit
interviewbit.com › java-8-interview-questions
Top 30+ Java 8 Interview Questions (2026) - InterviewBit
As of today, there are 1,751,661 questions around Java on StackOverflow and 123,776 Java public repositories on GitHub and continuously increasing. Considering Java 8 to be one of the most stable versions, there are immense career opportunities and scope in the same. Just understand the concepts, implement them and get ready for the interviews! ... Stream<String> st = Stream.iterate("", (str) -> str + "x"); System.out.println(st.limit(3).map(str -> str + "y"));
Published February 9, 2026
Blogger
javarevisited.blogspot.com › 2021 › 05 › java-8-stream-lambda-expression-d.html
Top 50 Java 8 Stream, Lambda, and Functional Programming Interview Questions
April 22, 2024 - The shift in programming style is also now visible on Java Interviews with more and more focus putting on Java 8 skills e.g. whether the candidate is familiar with essential Java 8 features like lambda expressions, streams, method reference, and new Date-Time API. I have seen more and more questions being asked about motivation, implementation, and how Java programs can use new Java 8 features in their day-to-day programming.
LinkedIn
linkedin.com › pulse › java-8-stream-api-commonly-asked-interview-questions-kumar-yadav-1mwcc
Java 8 Stream API Commonly Asked Interview Questions
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GitHub
github.com › rohitchavan-git › Java-8-Interview-Sample-Coding-Questions
GitHub - rohitchavan-git/Java-8-Interview-Sample-Coding-Questions: This repository contains sample Java 8 coding questions that can be used for interview preparation. Each question focuses on a specific programming concept or problem-solving technique using Java 8 features. · GitHub
This repository contains sample Java 8 coding questions that can be used for interview preparation. Each question focuses on a specific programming concept or problem-solving technique using Java 8 features. Separate odd and even numbers in a list of integers · Given a list of integers, write a Java 8 program to separate the odd and even numbers into two separate lists. Remove duplicate elements from a list using Java 8 streams
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JavaTechOnline
javatechonline.com › home › java 8 coding interview questions
Java 8 Coding Interview Questions - JavaTechOnline
May 1, 2025 - This code uses Java 8 Streams & Method Reference to find the maximum value in a list of integers. ... Next Question will come shortly …..
Baeldung
baeldung.com › home › java › java 8 interview questions(+ answers)
Java 8 Interview Questions(+ Answers) | Baeldung
January 11, 2024 - A set of popular Java8-related interview questions and of course answers.
GeeksforGeeks
geeksforgeeks.org › java › java-8-interview-questions-and-answers
Top 30 Java 8 Interview Questions and Answers for 2025 - GeeksforGeeks
August 21, 2025 - It introduced several key innovations ... the Stream API, Functional Interfaces, the java.time package for date and time manipulation, and the Optional class for handling potentially null values. Java 8 was designed to improve developer productivity, code readability, and performance, making it a watershed moment in the Java language's evolution. In the upcoming section, resources are crafted for Freshers and Experienced Professionals. These Interview Questions for Java 8 ...
Java67
java67.com › 2018 › 10 › java-8-stream-and-functional-programming-interview-questions-answers.html
Top 15 Java 8 Stream and Functional Programming Interview Questions Answers | Java67
Top 10 excuse for not doing Unit testing and Code ... Top 5 Frequently Asked HR Interview Questions in J... ... How to convert a Map to List in Java? HashMap to A... How HashSet works in Java [Explained with Example] How get() and put() methods of HashMap works in Ja... How to check if a Key Object Exists in HashMap Jav... How to sort HashMap by values in Java 8 [using Lam...
Cloud Foundation
cloudfoundation.com › blog › java-stream-interview-questions-and-answers
Java Stream Interview Questions and Answers
February 26, 2024 - Java streams are a powerful feature ... in Java 8 that allows developers to write more concise and efficient code. They provide a way to process collections in a functional, parallel, and lazy manner, using Java streams, developers can avoid creating unnecessary copies of collections, reduce memory usage, and improve performance. In this interview question and answer, ...
Reddit
reddit.com › r/learnjava › does anyone have any stream based interview questions i can use to prepare?
r/learnjava on Reddit: Does anyone have any stream based interview questions I can use to prepare?
February 17, 2021 -
Preparing for an interview next week and the recruiter told me to expect to be presented code which contains Java 8 features (streams, lambda expressions, functional interfaces etc.) and I should be able to on the spot explain what the code does and how it works. Does anyone have any examples of complicated blocks of code which use these features I can practice with? I understand all of these concepts individually, but just like an exam at school I would like to just smash through lots of examples just to get into the rhythm of it. I have <2 YOE if it makes a difference :)
Medium
medium.com › @priyadharsr › java-8-streams-coding-interview-questions-d1cbadc69e4f
Java 8 Streams coding interview questions : | by Priya | Medium
January 12, 2025 - Java 8 Streams coding interview questions : 1. Find Employees with Second-Highest Salary Problem: You are given a list of employees. Write a program to find the employees who have the second-highest …
Naukri
naukri.com › code360 › library › stream-api-interview-questions
Java Stream API Interview Questions and Answers (2025)
July 14, 2025 - Almost there... just a few more seconds
DZone
dzone.com › coding › java › top 40 java 8 interview questions with answers
Top 40 Java 8 Interview Questions With Answers
November 1, 2023 - Parallel Streams: Java 8 introduced the concept of parallel streams, enabling efficient parallel processing of data. Nashorn JavaScript Engine: Java 8 included the Nashorn JavaScript engine, allowing developers to execute JavaScript code within Java applications. The Complete Java Developer Course: From Beginner to Master.* ... This is one of the most frequently asked Java 8 interview questions.
Medium
medium.com › @ketan.patel_46870 › mastering-java8-stream-programming-questions-8e410760ca60
Java8 Stream coding questions. I have given multiple interviews… | by Ketan Patel | Medium
November 14, 2024 - I believe once you go through below questions, you will be able to answer any other questions asked on Stream in interviews. ... Find the maximum value in the List<Integer>. List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5); int max = numbers.stream() .max(Integer::compareTo) // Above code uses method referene, // Below commented code uses lamnda expression.
Udemy
udemy.com › development › programming languages › java
Free Java Tutorial - Java 8 Streams Interview Questions | Udemy
This specialized course is designed to equip you with the essential knowledge and practical skills needed to excel in Java interviews, particularly focusing on the influential concepts of Interfaces and Streams. In the dynamic landscape of Java development, understanding Interfaces is paramount. Our course delves into the nuances of interface implementation, default methods, and the profound impact they have on code structure and design.
Medium
medium.com › @mehar.chand.cloud › java-stream-coding-interview-questions-part-1-dc39e3575727
Java Stream Coding Interview Questions: Part 1 | by Mehar Chand | Medium
April 13, 2024 - Q. Implement a method to partition a list into two groups based on a predicate using Java streams: List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9); Map<Boolean, List<Integer>> partitioned = numbers .stream() .collect(Collectors.partitioningBy(n -> n % 2 == 0)); List<Integer> evenNumbers = partitioned.get(true); List<Integer> oddNumbers = partitioned.get(false); System.out.println("Even numbers: " + evenNumbers); System.out.println("Odd numbers: " + oddNumbers);
Medium
medium.com › @programmingsolutions750 › top-20-java-8-streams-coding-interview-questions-every-developer-must-know-part-2-b6030ae152cf
Top 20 Java 8 Streams Coding Interview Questions Every Developer Must Know(Part-2) | by FullStack With Ram | Medium
July 12, 2025 - import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; public class EvenNumberFilter { public static void main(String[] args) { List<Integer> numbers = Arrays.asList(1, 2, 3…