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NeetCode 150

The gold standard for modern technical interview preparation.

Introduction

As interview difficulty increased over the years, the Blind 75 began to show gaps. A prominent educator named NeetCode expanded the original 75 questions into a meticulously categorized list of 150 questions.

Today, the NeetCode 150 is widely considered the best prep resource on the internet.

Why the NeetCode 150 is superior

  1. Perfect Categorization: The questions are strictly grouped by pattern (e.g., "Two Pointers", "Sliding Window", "Tries", "1D DP"). This forces you to learn the pattern, not the question.
  2. Progressive Difficulty: Each category starts with Easy fundamental questions and ramps up to Mediums and Hards.
  3. Comprehensive Coverage: It covers modern patterns that the Blind 75 missed, including:
  4. Monotonic Stacks
  5. Advanced Heap / Priority Queue problems
  6. Advanced Backtracking
  7. Bit Manipulation

How to study the NeetCode 150

Do not just go through the list linearly from 1 to 150. Study by category.

  1. Pick a category (e.g., "Sliding Window").
  2. Attempt the Easy question. If you struggle, look at the solution, write it out, and understand why it works.
  3. Attempt the Medium questions. Use the pattern you just learned from the Easy question.
  4. Move to the next category.

By studying categorically, you build deep muscle memory for that specific pattern.

The "Spaced Repetition" Strategy

After you finish all 150 questions, you will likely have forgotten the patterns from the first few categories.

Create a spreadsheet. Rate your confidence on each question (Red, Yellow, Green). Re-visit the Red questions every 3 days. Re-visit the Yellow questions every week. Ignore the Green questions.

Key Takeaways

  • The NeetCode 150 is an expanded, modernized version of the Blind 75.
  • It is perfectly categorized by algorithmic pattern.
  • Study one category at a time to build muscle memory.
  • Use spaced repetition to retain the patterns long-term.