HomeCoursesRecursion for Coding Interviews in Java

Updated 1 month ago

AI-powered learning

Save

Recursion for Coding Interviews in Java

The ultimate guide to recursion interviews with strategies developed by FAANG engineers. Practice with real-world interview questions, detailed explanations, and visualizations to prep faster.

51 lessons

Created by Educative

Also available in

C++

Java

JavaScript

Python

Also available in

Java

What's included

51 lessons across 6 modules
6 quizzes with instant feedback
AI Tutor on every lesson

Join 3.1 million developers at

What You'll Learn

Identify base and recursive cases in Java methods to construct correct recursive solutions
Visualize recursion memory usage by tracing the call stack and variable state during execution
Decide when to use recursion vs iteration based on subproblems, nesting needs, and tradeoffs
Convert iterative Java code into recursion by translating loop logic into base cases and calls
Implement recursive solutions for number problems (power, sum to n, modulo, Fibonacci, GCD, prime, binary)
Implement recursive solutions for string problems (reverse, remove duplicates, merge, vowels, permutations, palindrome)
Apply recursion to arrays and data structures (array tasks, linked lists, BST insert, DFS, topological sort)

Learning Roadmap

51 Lessons6 Quizzes9 Challenges

Fundamentals of Recursion

Learn how to use recursion in Java for efficient problem-solving with practical examples.

What is Recursion?

Recursion and Memory Visualization

Direct vs. Indirect Recursion

When to use Recursion

What to Expect

Understanding a Recursive Problem

Advantages and Disadvantages

Iteration to Recursion

Solve challenges with transforming iterative code to recursive, comparing recursion vs. iteration.

Iteration

Recursion vs. Iteration

Changing Iterative Code to Recursive

Challenge 1: Length of a Linked List

Solution Review: Length of a Linked List

Quick Quiz on Iteration!

Recursion with Numbers

11 Lessons

Work your way through core recursion techniques on numbers: power, sum, modulo, Fibonacci, GCD, prime, and binary conversion.

Recursion with Strings

10 Lessons

Enhance your skills in solving string problems through recursive techniques and challenges.

Recursion with Arrays

9 Lessons

Take a closer look at solving array problems using recursion in Java, including challenges.

Recursion with Data Structures

8 Lessons

Follow recursion techniques to solve linked list problems, BST insertions, and graph traversals.

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Developed by MAANG Engineers

Every Educative lesson is designed by a team of ex-MAANG software engineers and PhD computer science educators, and developed in consultation with developers and data scientists working at Meta, Google, and more. Our mission is to get you hands-on with the necessary skills to stay ahead in a constantly changing industry. No video, no fluff. Just interactive, project-based learning with personalized feedback that adapts to your goals and experience.

Trusted by 3.1 million developers working at companies

These are high-quality courses. Trust me the price is worth it for the content quality. Educative came at the right time in my career. I'm understanding topics better than with any book or online video tutorial I've done. Truly made for developers. Thanks

Anthony Walker

@_webarchitect_

Just finished my first full #ML course: Machine learning for Software Engineers from Educative, Inc. ... Highly recommend!

Evan Dunbar

ML Engineer

You guys are the gold standard of crash-courses... Narrow enough that it doesn't need years of study or a full blown book to get the gist, but broad enough that an afternoon of Googling doesn't cut it.

Software Developer

Carlos Matias La Borde

I spend my days and nights on Educative. It is indispensable. It is such a unique and reader-friendly site

Souvik Kundu

Front-end Developer

Your courses are simply awesome, the depth they go into and the breadth of coverage is so good that I don't have to refer to 10 different websites looking for interview topics and content.

Vinay Krishnaiah

Software Developer

Course

The Complete Java Crash Course

Gain insights into Java, a versatile and portable programming language. Delve into similarities with C++ and Python and learn essential Java-specific features with practical coding examples.

6 h

intermediate

Course

Collections in Java

Gain insights into Java Collections Framework. Delve into lists, sets, and hashmaps. Learn about data modification, sorting, thread-safety, and internal workings for efficient usage.

5 h

intermediate

Course

The Java Interview Handbook: 300+ Interview Questions

Master modern Java 25+ for technical interviews. Build scalable applications with core OOP, memory management, and modern concurrency like Project Loom.

15 h

intermediate

Course

Recursion for Coding Interviews in C++

The ultimate guide to recursion interviews. Developed by FAANG engineers, practice with real-world C++ problems, interactive code playgrounds, and get interview-ready in just a few hours.

3 h

intermediate

Course

Learn REST and SOAP API Test Automation in Java

Gain insights into performing REST and SOAP API test automation, writing API and integration tests from scratch, and preparing for test automation interviews with a downloadable framework.

3 h

intermediate

Course

Design a Test Automation Framework with Selenium and Java

Delve into designing a test automation framework using Java and Selenium. Learn about Selenium basics, TestNG, build management, logging, and reporting to automate web applications effectively.

12 h

beginner

Course

Java Unit Testing with JUnit 5

Gain insights into configuring and utilizing JUnit 5 for Java unit testing. Learn about writing effective unit tests, integrating assertions, assumptions, parameterized tests, and their significance.

5 h

intermediate

Course

Grokking the Coding Interview Patterns

Grokking the Coding Interview is the best course that saves countless hours wasted in grinding LeetCode. Master 28 coding patterns; unlock all LeetCode problems. Developed by and for MAANG engineers.

85 h

intermediate

Course

The Complete Java Crash Course

The Java Interview Handbook: 300+ Interview Questions

intermediate

15 hour

Course

Recursion for Coding Interviews in C++

intermediate

3 hour

Course

Learn REST and SOAP API Test Automation in Java

intermediate

3 hour

Course

Design a Test Automation Framework with Selenium and Java

beginner

12 hour

Course

Java Unit Testing with JUnit 5

intermediate

5 hour

Course

Grokking the Coding Interview Patterns

intermediate

85 hour

Frequently Asked Questions

Is it a good choice to use recursion in Java interviews?

Recursion is often encouraged in Java interviews, but be mindful of performance and stack limitations, especially with deep recursion.

What are the advantages of recursion over iteration in Java?

Recursion simplifies code for certain problems, like tree traversals, but due to stack overhead, it may be less efficient than iteration for larger datasets.

What are the key recursion techniques I should know for Java interviews?

Focus on mastering basic recursion, tail recursion, and optimizations like memoization to handle complex problems efficiently.

What is a real-life example of recursion in programming?

Navigating directories in a file system is a real-life example of recursion. Each folder can contain files or subfolders, and traversing them mimics recursion.

How many types of recursion are there in Java?

In Java, recursion can be categorized into two types: direct recursion (where a method calls itself) and indirect recursion (where a method is called by another method in a recursive loop).