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Google Coding Interview Questions

Sharpen your skills with coding problems modeled after real Google interviews—focusing on algorithmic depth, performance under constraints, and clear technical thinking.

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Overview

Content

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Google’s coding interviews assess more than your ability to write working code—they test how you structure ideas, optimize for scale, and communicate your decisions. Whether you're targeting front-end, back-end, or full-stack roles, these problems reflect Google’s high bar for technical rigor, clarity, and creativity. Each coding problem is framed with constraints and interviewer-style prompts to help you code like a Googler, and think like one too.

Google’s coding interviews assess more than your ability to write working code—they test how you structure ideas, optimize for s...Show More

WHAT YOU'LL LEARN

Structured thinking to break down open-ended algorithmic problems.

Fluent use of data structures like graphs, heaps, and hash maps.

Technical articulation of logic, trade-offs, and design decisions under pressure.

Scalable thinking for writing modular, maintainable, and efficient code.

Structured thinking to break down open-ended algorithmic problems.

Content

792 Lessons412 Quizzes411 Challenges

Getting Started

2 Lessons

Course Overview

Who Should Take This Course

Two Pointers

30 Lessons

Introduction to Two Pointers

Valid Palindrome

Solution: Valid Palindrome

3Sum

Solution: 3Sum

Remove Nth Node from End of List

Solution: Remove Nth Node from End of List

Sort Colors

Solution: Sort Colors

Reverse Words in a String

Solution: Reverse Words in a String

Valid Word Abbreviation

Solution: Valid Word Abbreviation

Strobogrammatic Number

Solution: Strobogrammatic Number

Minimum Number of Moves to Make Palindrome

Solution: Minimum Number of Moves to Make Palindrome

Next Palindrome Using Same Digits

Solution: Next Palindrome Using Same Digits

Lowest Common Ancestor of a Binary Tree III

Solution: Lowest Common Ancestor of a Binary Tree III

Count Pairs Whose Sum is Less than Target

Solution: Count Pairs Whose Sum is Less than Target

Count Subarrays With Fixed Bounds

Solution: Count Subarrays With Fixed Bounds

Get the Maximum Score

Solution: Get the Maximum Score

Find the Lexicographically Largest String From Box II

Solution: Find the Lexicographically Largest String From Box II

Valid Palindrome II

Two Pointers

Mock Interview

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Fast and Slow Pointers

21 Lessons

Fast and Slow Pointers

Mock Interview

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Sliding Window

31 Lessons

Sliding Window

Mock Interview

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Merge Intervals

16 Lessons

In-Place Manipulation of a Linked List

24 Lessons

Heaps

25 Lessons

Heaps

Mock Interview

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K-way merge

15 Lessons

Top K Elements

33 Lessons

10.

Modified Binary Search

30 Lessons

Modified Binary Search

Mock Interview

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11.

Subsets

14 Lessons

12.

Greedy Techniques

31 Lessons

13.

Backtracking

31 Lessons

14.

Dynamic Programming

36 Lessons

Dynamic Programming

Mock Interview

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15.

Cyclic Sort

12 Lessons

16.

Topological Sort

18 Lessons

Topological Sort

Mock Interview

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17.

Sort and Search

31 Lessons

18.

Matrices

33 Lessons

19.

Stacks

26 Lessons

20.

Graphs

31 Lessons

Graphs

Mock Interview

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21.

Tree Depth-First Search

33 Lessons

22.

Tree Breadth-First Search

20 Lessons

Tree Breadth First Search

Mock Interview

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23.

Trie

22 Lessons

24.

Hash Maps

36 Lessons

25.

Knowing What to Track

30 Lessons

26.

Union Find

24 Lessons

Union Find

Mock Interview

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27.

Custom Data Structures

28 Lessons

28.

Bitwise Manipulation

30 Lessons

29.

Math and Geometry

37 Lessons

30.

Challenge Yourself

41 Lessons

31.

Conclusion

1 Lessons

Coding Patterns

Mock Interview

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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 2.7 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."

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

Hands-on Learning Powered by AI

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

Personalized Interview Prep

Skip the LeetCode grind with a custom roadmap that adapts to your goals. Hands-on practice for Coding Interviews, System Design, and more.

Mock Interviews

Test your skills in a simulated interview setting. Receive personalized feedback based on your performance. Available for Coding Interviews, System Design, and more.

AI Prompt

Build prompt engineering skills. Practice implementing AI-informed solutions.

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.

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!

Free Resources

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