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Recursion for Coding Interviews in JavaScript

The ultimate guide to recursion interviews in JavaScript. Developed by FAANG engineers. Practice with real-world interview questions and get interview-ready in just a few hours.

Intermediate

58 Lessons

8h

Certificate of Completion

The ultimate guide to recursion interviews in JavaScript. Developed by FAANG engineers. Practice with real-world interview questions and get interview-ready in just a few hours.

AI-POWERED

Mock Interview

Explanations

AI-POWERED

Mock Interview

Explanations

This course includes

37 Playgrounds

15 Challenges

6 Quizzes

Course Overview

Course Content

Recommendations

Course Overview

If you’ve ever struggled with solving problems using recursion, or if you have to brush up your skills for an interview, this course is for you. We'll start with the basics of what recursion is and why it’s important before diving into practicing solving actual questions. You’ll have access to detailed explanations and visualizations for each problem to help you along the way. By the time you have completed this course, you’ll be able to use all the concepts to solve complex real-world problems. We hope ...Show More

If you’ve ever struggled with solving problems using recursion, or if you have to brush up your skills for an interview, this course is for you. We'll start with the basics of what recursion is and why it’s important before diving into practicing solving ...Show More

Course Content

1.

Recursion Fundamentals

7 Lessons

Get familiar with recursion concepts, memory management, and practical uses in JavaScript.

Who is this course for?

What is Recursion?

Recursion and Memory Visualization

Direct vs. Indirect Recursion

When to Use Recursion?

Understanding a Recursive Problem

Test Your Knowledge 1

2.

Iteration Vs Recursion

11 Lessons

Unpack the core of iteration vs. recursion, converting techniques, and practical challenges.

Overview of Iterative Functions

Difference Between Iteration and Recursion

Converting Iterative Code to Recursive Code

Count Vowels in a String

Challenge 1: Compute the Square of a Number

Solution Review: Compute the Square of a Number

Challenge 2: Search the First Occurrence of a Number

Solution Review: Search the First Occurrence of a Number

Challenge 3: The nth Fibonacci Number

Solution Review: Corresponding Fibonacci Number

Test Your Knowledge 2

3.

Recursion with Numbers

10 Lessons

Examine recursive solutions for numerical problems like powers, sums, GCD, Pascal's Triangle, and binary conversion.

Power of a Number

Sum of Integers from 1 to n

Challenge 1: Find the Greatest Common Divisor

Solution Review: Find the Greatest Common Divisor

Challenge 2: Pascal's Triangle

Solution Review: Pascal's Triangle

Challenge 3: Convert Decimal Number to Binary Number

Solution Review: Convert Decimal Number to Binary Number

Test Your Knowledge 3

4.

Recursion with Strings

10 Lessons

Break down complex ideas to handle strings recursively for manipulations, checks, and challenges.

Remove Spaces and Tabs in a String

Remove all Adjacent Duplicates from a String

Merge Two Sorted Strings Lexicographically

Challenge 1: Length of a String

Solution Review: Length of a String

Challenge 2: Sum of Digits in a String

Solution Review: Sum of Digits in a String

Challenge 3: Check Palindrome

Solution Review: Check Palindrome

Test Your Knowledge 4

5.

Recursion with Arrays

10 Lessons

Solve problems in recursion with arrays, including counting, reversing, replacing, averaging, balancing, and sorting.

Count all Occurrences of a Number

Reverse an Array

Replace all Negative Numbers with Zero

Challenge 1: Average of Numbers

Solution Review: Average of Numbers

Challenge 2: Balance Parenthesis

Solution Review: Balance Parenthesis

Challenge 3: Sort an Array

Solution Review: Sort an Array

Test Your Knowledge 5

6.

Recursion with Data Structures

9 Lessons

Focus on recursion in linked lists, graphs, and stacks with practical challenges and solutions.

Reverse Linked List

Depth First Traversal of Graph

Challenge 1: Length of a Linked List

Solution Review: Length of a Linked List

Challenge 2: Reverse a Stack

Solution Review: Reverse a Stack

Challenge 3: Topological Sorting of a Graph

Solution Review 3: Topological Sorting of a Graph

Test Your Knowledge 6

7.

Conclusion

1 Lessons

Practice using recursion to simplify code, especially for complex tasks like graph traversals.

More on Recursion

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Free Resources

Frequently Asked Questions

Is recursion asked in JavaScript coding interviews?

Yes, recursion is frequently asked in JavaScript coding interviews, especially for problems like tree traversals, sorting algorithms, and backtracking.

What is the main purpose of recursion in JavaScript?

The main purpose of recursion is to solve problems by breaking them down into smaller subproblems, making it easier to handle complex data structures like trees and graphs.

Can JavaScript be used for coding interviews?

Absolutely! JavaScript is commonly used in coding interviews, particularly for frontend and full-stack roles, and recursion is an important topic.

Which is faster, loops or recursion, in JavaScript?

Loops are generally faster than recursion in JavaScript due to the overhead of function calls. However, recursion simplifies the code for problems like tree traversal.

When should I avoid using recursion in JavaScript?

Avoid recursion when dealing with large datasets or deep recursion levels, as this can cause stack overflow errors in JavaScript. Use iteration in such cases.

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