BLIND 75-STYLE CODING CHALLENGES BY EDUCATIVE

Blind 75 Problems

Blind 75 Problems

Accelerate your coding interview prep with Educative’s guide to Blind 75 — a treasure trove of essential coding challenges designed to help you practice your skills and increase your odds of success.

Master a pattern-based approach to coding challenges. Confidently unlock thousands of top interview questions.

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Master Coding Interviews in 5 Popular Languages

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What is Blind 75?

Blind 75 LeetCode questions are a curated compilation of the most frequently asked data structures and algorithms-based coding interview problems at big tech companies, including FAANG.

Blind 75 has a track record of proven results — mastering this list will increase your chances of having a successful interview and boosting your career opportunities.

This guide is curated to help you solidify a pattern-based approach to answers coding challenges, which you can apply to even the trickiest interview questions.

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Practice Blind 75 Problems

Unique Path'.png
Decoding Ways.png
Best day to sell and buy stocks - icon.png

Unique Paths

Decode Ways

Best Time to Buy and Sell Stock

valid-anagram.png
5. Valid Parentheses.png
House Robber.png

Valid Anagram

Valid Parentheses

House Robber

Product of Array Except Self.png
House Robber 2.png
Number of Connected Components in an Undirected Graph.png

Product of Array Except Self

House Robber II

Number of Connected Components in an Undirected Graph

13. Graph Valid Tree.png
Meeting rooms II.png
Search in Rotated Sorted Array.png

Graph Valid Tree

Meeting Rooms II

Search in Rotated Sorted Array

word-search-2(1).png
Longest Consecutive Sequence.png
Find Minimum in Rotated Sorted Array.png

Word Search II

Longest Consecutive Sequence

Find Minimum in Rotated Sorted Array

Longest Repeating Character Replacement.png
Insert Intervals.png
Find Median from Data Stream.png

Longest Repeating Character Replacement

Insert Interval

Find Median from Data Stream

8. remove nth node form end of list.png
Merge K Sorted Lists.png
Pacific Atlantic Water Flow.png

Remove Nth Node From End Of List

Merge K Sorted Lists

Pacific Atlantic Water Flow

Minimum Window Substring.png
2. Validate Binary Search Tree.png
Non-overlapping Intervalsldpi.png

Minimum Window Substring

Validate Binary Search Tree

Non-overlapping Intervals

Construct Binary Tree from Preorder and Inorder Traversal.png
Top K Frequent Elements.png
6. clone graph.png

Construct Binary Tree from Preorder and Inorder Traversal

Top K Frequent Elements

Clone Graph

Kth Smallest Element in a BST.png
8. Serialize and Deserialize Binary Tree.png
Binary Tree Maximum Path Sum.png

Kth Smallest Element in a BST

Serialize and Deserialize Binary Tree

Binary Tree Maximum Path Sum

Maximum Depth of Binary Treeldpi.png
11- same tree.png
Binary Tree Level Order Traversal.png

Maximum Depth of Binary Tree

Same Tree

Binary Tree Level Order Traversal

Code and Decode string.png
1- Subtree of Another Tree.png
Add and search word.png

Encode and Decode Strings

Subtree of Another Tree

Add and Search Word

Unique Path'.png

Unique Paths

Decoding Ways.png

Decode Ways

Best day to sell and buy stocks - icon.png

Best Time to Buy and Sell Stock

valid-anagram.png

Valid Anagram

5. Valid Parentheses.png

Valid Parentheses

House Robber.png

House Robber

Product of Array Except Self.png

Product of Array Except Self

House Robber 2.png

House Robber II

Number of Connected Components in an Undirected Graph.png

Number of Connected Components in an Undirected Graph

13. Graph Valid Tree.png

Graph Valid Tree

Meeting rooms II.png

Meeting Rooms II

Search in Rotated Sorted Array.png

Search in Rotated Sorted Array

word-search-2(1).png

Word Search II

Longest Consecutive Sequence.png

Longest Consecutive Sequence

Find Minimum in Rotated Sorted Array.png

Find Minimum in Rotated Sorted Array

Longest Repeating Character Replacement.png

Longest Repeating Character Replacement

Insert Intervals.png

Insert Interval

Find Median from Data Stream.png

Find Median from Data Stream

8. remove nth node form end of list.png

Remove Nth Node From End Of List

Merge K Sorted Lists.png

Merge K Sorted Lists

Pacific Atlantic Water Flow.png

Pacific Atlantic Water Flow

Minimum Window Substring.png

Minimum Window Substring

2. Validate Binary Search Tree.png

Validate Binary Search Tree

Non-overlapping Intervalsldpi.png

Non-overlapping Intervals

Construct Binary Tree from Preorder and Inorder Traversal.png

Construct Binary Tree from Preorder and Inorder Traversal

Top K Frequent Elements.png

Top K Frequent Elements

6. clone graph.png

Clone Graph

Kth Smallest Element in a BST.png

Kth Smallest Element in a BST

8. Serialize and Deserialize Binary Tree.png

Serialize and Deserialize Binary Tree

Binary Tree Maximum Path Sum.png

Binary Tree Maximum Path Sum

Maximum Depth of Binary Treeldpi.png

Maximum Depth of Binary Tree

11- same tree.png

Same Tree

Binary Tree Level Order Traversal.png

Binary Tree Level Order Traversal

Code and Decode string.png

Encode and Decode Strings

1- Subtree of Another Tree.png

Subtree of Another Tree

Add and search word.png

Add and Search Word

Benefits of Solving Educative’s Blind 75 Problems

Blind 75 helps you save time by focusing on only the most essential questions in tech interviews. Using Educative’s Blind 75 guide will help you streamline your prep by mastering the fundamentals.

Get hands-on practice with essential data structures and algorithms, including arrays, strings, graphs, trees and dynamic programming

Prep faster and more comprehensively with a curated list of essential questions — giving you comprehensive coverage for any coding interview

Each problem is treated like a real interview scenario, helping you develop and practice a repeatable process for tackling real-world questions

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Frequently asked questions

Haven’t found what you were looking for? Contact Us

What are Blind 75 questions?

The “Blind 75” is a curated list of 75 coding interview questions that have been frequently mentioned by users on the Blind platform as being common or essential for tech interviews, especially at big tech companies. The list is designed to give job seekers a focused set of problems to practice in preparation for coding interviews.

Is Blind 75 enough for a coding interview?

By completing the “Blind 75” questions, you’ll cover many coding topics. Thoroughly practicing these questions helps you get ready for most coding interviews. To ace your coding interview, try Educative’s interview prep courses, which can help you learn everything you need to know for your coding interview.

Is Blind 75 enough for FAANG?

You can start with Blind 75 for interview preparation. Blind 75 includes a broad spectrum of essential topics that help you focus on not just coding skills, but your overall problem-solving approach. This is especially useful because interviewers are interested in understanding your thought process and how you handle various scenarios, including edge cases.

Is Blind 75 still valid in 2024?

Blind 75 was launched seven years ago. Despite its age, the questions remain largely pertinent today. However, it seems that for some, 75 questions just don’t suffice. There’s a growing demand for additional practice questions beyond the original Blind 75 set.

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