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Grokking the Coding Interview Patterns

Name: Grokking the Coding Interview Patterns
Rating: 4.9 (7 reviews)

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.

4.9

1127 Lessons

85h

Updated this week

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Python

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LEARNING OBJECTIVES

Identify and apply coding interview patterns to solve algorithmic problems effectively
Utilize data structures such as arrays, linked lists, stacks, and queues in coding challenges
Implement sorting and searching algorithms to optimize problem-solving efficiency
Analyze and apply dynamic programming techniques to tackle complex problems
Employ graph algorithms to solve connectivity and traversal challenges
Develop proficiency in string manipulation and pattern recognition for coding interviews

KEY OUTCOMES

Ace Coding Interviews

Demonstrate the ability to solve coding interview problems using established patterns and strategies, showcasing technical proficiency.

Optimize Algorithm Performance

Implement efficient algorithms and data structures to improve performance in real-world coding scenarios, ensuring timely problem resolution.

Master Problem-Solving Techniques

Apply a variety of problem-solving techniques, including dynamic programming and graph algorithms, to address complex coding challenges.

Communicate Technical Solutions

Effectively articulate technical solutions and reasoning during interviews, demonstrating clarity in thought and approach.

Why choose this course?

Learn 28 Non-negotiable Coding Patterns

Begin your journey with core coding patterns like Two Pointers, Binary Search, and Linked List manipulation. Each problem is a paired challenge and solution: first implement your own approach, then study a step-by-step optimal solution.

Master Advanced Algorithms and Data Structures

Level up with complex topics such as Dynamic Programming, Graphs, Tries, and Union Find. These advanced patterns often appear in the toughest interviews and will prepare you to approach difficult questions with confidence and clarity.

Mock Interviews for Every Coding Pattern

At the end of each chapter, take an AI-driven mock interview. Practice under real conditions and strengthen your ability to explain solutions clearly.

Put Your Skills to the Test

Wrap up your preparation in the Challenge Yourself section, where problems are presented without pattern labels. This sharpens your ability to recognize the right approach on your own, just like in a real interview.

Learning Roadmap

Two Pointers

Introduction to Two Pointers

Valid Palindrome

3Sum

med

Remove nth Node from End of List

med

Sort Colors

med

Reverse Words in a String

med

Valid Word Abbreviation

Valid Palindrome II

Lowest Common Ancestor of a Binary Tree III

med

Strobogrammatic Number

Minimum Number of Moves to Make Palindrome

hard

Next Palindrome Using Same Digits

hard

Count Subarrays With Fixed Bounds

hard

Find the Lexicographically Largest String From Box II

hard

Get the Maximum Score

hard

Create Maximum Number

hard

Append Characters to String to Make Subsequence

med

Squares of a Sorted Array

Reverse String

Intersection of Two Linked Lists

Remove Duplicates from Sorted Array

Reverse Vowels of a String

Is Subsequence

Merge Strings Alternately

Compare Version Numbers

med

Move Zeroes

med

Longest Subarray of 1's After Deleting One Element

med

Backspace String Compare

med

Next Greater Element III

med

Rotating the Box

med

Fast and Slow Pointers

Master the steps to use fast and slow pointers for cycle detection and mid-point identification.

Introduction to Fast and Slow Pointers

Happy Number

Linked List Cycle

Middle of the Linked List

Circular Array Loop

med

Find The Duplicate Number

med

Palindrome Linked List

Linked List Cycle III

med

Linked List Cycle IV

med

Maximum Twin Sum of a Linked List

med

Split a Circular Linked List

med

Sliding Window

Intervals

Solve problems in merging intervals, inserting and finding intersections of intervals, scheduler tasks, and determining employee free time.

In-Place Manipulation of a Linked List

Tackle in-place linked list manipulations for efficient and memory-optimized operations.

Two Heaps

Master the steps to optimize dynamic data processing and decision-making using heaps.

K-way Merge

Learn how to use k-way merge for efficient data merging and finding k-th small elements.

Top K Elements

Walk through the top k elements pattern and learn efficient selection using heaps.

Modified Binary Search

10.

Subsets

Grasp the fundamentals of generating subsets, permutations, and combinations.

11.

Greedy Techniques

12.

Backtracking

Explore backtracking algorithm for solving complex problems like N-Queens, word search, binary tree paths, and Sudoku.

13.

Dynamic Programming

14.

Cyclic Sort

Step through cyclic sort concepts to efficiently handle various missing and corrupt number scenarios.

15.

Topological Sort

16.

Sort and Search

17.

Matrices

18.

Stacks

19.

Graphs

20.

Tree Depth-First Search

21.

Tree Breadth-First Search

22.

Trie

Step through efficient trie implementations to optimize search suggestions, word replacements, and common prefix finding.

23.

Hash Maps

24.

Knowing What to Track

25.

Union Find

Enhance your skills in Union-Find to address diverse graph and connectivity problems.

26.

Custom Data Structures

Dig into creating and implementing custom data structures for solving specialized problems efficiently.

27.

Bitwise Manipulation

28.

Math and Geometry

29.

Challenge Yourself

Test your understanding of various coding challenges focusing on algorithm efficiency.

Course Author:

Fahim ul Haq

Developed by MAANG Engineers

ABOUT THIS COURSE

I created Grokking the Coding Interview because I watched too many talented engineers fail interviews they should have passed. At Microsoft and Meta, I saw firsthand what separated the candidates who succeeded from the ones who didn't. It wasn't how many LeetCode problems they'd solved. It was whether they could look at an unfamiliar problem and know how to approach it the right way. That's what this course teaches. Rather than throwing hundreds of disconnected problems at you, we organize the entire coding interview around 28 fundamental patterns. Each pattern is a reusable strategy. Once you understand two pointers, for example, you can apply them to dozens of problems you've never seen before. The course walks you through each pattern step by step, starting with the intuition behind it, then building through increasingly complex applications. As with every course on Educative, you will practice in a hands-on way with 500+ challenges, 17 mock interviews, and detailed explanations for every solution. The course is available in Python, Java, JavaScript, Go, C++, and C#, so you can prep in the language you'll actually use in your interview. Whether you're preparing for your first FAANG loop or brushing up after a few years away from interviewing, this course will give you a repeatable framework for cracking the coding interview.

ABOUT THE AUTHOR

Fahim ul Haq

Software Engineer, Distributed Storage at Meta and Microsoft, Educative (Co-founder & CEO)

Learn more about Fahim

Trusted by 3 million developers working at companies

Great content, both theoretical and in terms of the selected problems. I do feel much stronger now in tackling various problems and utilizing a diverse set of patterns.

Vlad

Learner

The flexibility to learn at my own pace, combined with a supportive community, kept me motivated and on track.

Abayomi O

Learner

One of my key goals was to enhance my problem-solving skills for coding interviews. Educative's Grokking the Coding Interview course was instrumental

Abayomi O

Learner

Educative has been a game-changer in my learning journey. I particularly appreciated the in-browser coding environments, which allowed me to practice without any setup hassles.

Abayomi O

Learner

Overall, it is excellent, I like the explanations very much and they are very detailed with picture animations.

John Tang

Learner

Your explanations are great. The diagrams help understand the concepts easily.

Anant Rao

Learner

Amazing experience. I learnt a lot of new things.

Md. A. Barik

Learner

Skill Path

Educative-99 in Java: Accelerate Your Coding Interview Prep