Home>Courses>Recursion for Coding Interviews in Java

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.

Intermediate

51 Lessons

Certificate of Completion

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.

AI-POWERED

Mock Interview

Explanations

AI-POWERED

Mock Interview

Explanations

This course includes

38 Playgrounds

9 Challenges

6 Quizzes

Course Overview

Course Content

Recommendations

Course Overview

If you’ve got an interview coming up and want to brush up on your knowledge, or if you’ve ever struggled with solving coding problems using recursion, you'll find this course helpful. You’ll start with the basics of what recursion is and why it’s important before diving into what it looks like in practice. You’ll see how recursion can help you solve a variety of different math, string, and data structure problems by using interactive code playgrounds that you can execute directly in your browser. You’ll h...Show More

If you’ve got an interview coming up and want to brush up on your knowledge, or if you’ve ever struggled with solving coding pro...Show More

Course Content

Fundamentals of Recursion

7 Lessons

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

6 Lessons

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.

The Exponent of a Number

Sum of Integers from 1 to n

Modulo using Recursion

Computing Fibonacci Sequence

Challenge 1: Find the Greatest Common Divisor

Solution Review: Find the Greatest Common Divisor

Challenge 2: Check for Prime Number

Solution Review: Check for Prime Number

Challenge 3: Convert Decimal Number to Binary Number

Solution Review: Convert Decimal Number to Binary Number

Quick Quiz on Recursion with Numbers!

Recursion with Strings

10 Lessons

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

Reversing a String

Removing Duplicates in a String

Merging Strings in Alphabetic Order

Challenge 1: Let's find the total number of vowels!

Solution Review: Let's find the total number of vowels!

Challenge 2: Print all Permutations of a String

Solution Review: Permutations of a String

Challenge 3: Is this String a Palindrome?

Solution Review: Is this String a Palindrome?

Quick Quiz on Recursion with Strings!

Recursion with Arrays

9 Lessons

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

Find the First Occurrence of a Number in an Array

Count the Number of Occurrences of a Number in an Array

Replacing each Negative Integer with a 0 in an Array

Invert the Position of Elements in an Array

Challenge 1: Find if the Array is a Palindrome

Solution Review: Find if the Array is a Palindrome

Challenge 2: Sort an Array

Solution Review: Sort an Array

Quick Quiz on Recursion with Arrays!

Recursion with Data Structures

8 Lessons

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

Print a Reversed Linked List

Sum Numbers in a Linked List

Challenge 1: Search for a Value in a Linked List

Solution Review: Search for a Value in a Linked List

Insert Values in a Binary Search Tree

Depth First Search in Graphs

Topological Sort in Graphs

Quick Quiz on Recursion with Data Structures!

Trusted by 2.5 million developers working at companies

"These are high-quality courses. Trust me. I own around 10 and the price is worth it for the content quality. EducativeInc 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."

Carlos Matias La Borde

Software Developer

"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

"I've tried probably 5-7 different sites and Educative is easily the best. It perfectly blends explanation with interactivity"

Eric Downs

Musician/Entrepeneur

Hands-on Learning Powered by AI

See how Educative uses AI to make your learning more immersive than ever before.

Instant Code Feedback

Evaluate and debug your code with the click of a button. Get real-time feedback on test cases, including time and space complexity of your solutions.

AI-Powered Mock Interviews

Put your skills to the test in a simulated interview setting. Receive personalized feedback based on your performance. Available in Premium & Premium Plus plans.

Adaptive Learning

At various checkpoints throughout Educative courses, you will be prompted to take a quick assessment. Receive a condensed curriculum tailored to your strengths and skill gaps.

Explain with AI

Select any text within any Educative course, and get an instant explanation — without ever leaving your browser.

AI Code Mentor

AI Code Mentor helps you quickly identify errors in your code, learn from your mistakes, and nudge you in the right direction — just like a 1:1 tutor!

Recommended before starting this course

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.

intermediate

3 hours

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.

beginner

12 hours

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.

intermediate

5 hours

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

Related Courses and Skill Paths

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.

intermediate

6 hours

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.

intermediate

5 hours

Course

The Java Interview Handbook: 300+ Interview Questions

The ultimate guide to Java interviews with 300+ real-world questions and answers. Get interview-ready in just a few hours with strategies developed by FAANG engineers.

intermediate

15 hours

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.

intermediate

3 hours

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

Free Resources

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).