Google Interview Kit

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Pattern Video

Google Interview Kit — Interactive Walkthrough

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Google's L4–L6 interviews emphasize DP, Graph algorithms, Backtracking, and Divide & Conquer — with sharp attention to correctness proofs and complexity analysis.

What Google looks for by level

Level	Focus
L3 (SWE)	Arrays, strings, hashing, tree traversal
L4 (SWE II)	Medium DP, BFS/DFS, sorting-based problems
L5 (Senior)	Hard DP, tricky graph, algorithm + design trade-off
L6 (Staff)	Hard algorithm + system + review-others' code

Recommended problem sequence

Week 1

1. Two Sum
2. Longest Palindromic Substring
3. Search in Rotated Sorted Array

Week 2 — Trees + Graphs

4. Word Ladder — Google favorite
5. Alien Dictionary — Google favorite
6. Course Schedule II
7. Number of Islands II — UF streaming

Week 3 — Hard DP

8. Edit Distance
9. Longest Increasing Subsequence
10. Regular Expression Matching
11. Burst Balloons

Week 4 — Backtracking + BS

12. N-Queens
13. Sudoku Solver
14. Median of Two Sorted Arrays
15. Kth Smallest Element in a Sorted Matrix

What Google interviewers care about

• Correctness proof — can you argue why your algorithm works, not just what it does?
• Tight complexity — Google interviewers push for the theoretically optimal bound.
• Code quality — variable naming, function decomposition, no dead code.
• Follow-up scaling — "What if n = 10⁹?"

What learners say

Interview outcomes from real users

"The pattern-recognition framework finally clicked after a week of using this. Passed my Meta E5 loop last month."

S

Software Engineer, Meta (L5)

🎯 Meta E5 offer

"Company tags saved me hours — I focused only on problems asked at my target companies. Interviewer literally asked one I had just done."

S

SDE, Amazon SDE II

🎯 Amazon SDE II offer

"The 'Progressive Hints' are a game-changer. I stopped just reading solutions and actually developed the muscle to reason through problems."

B

Backend Engineer, Google L4

🎯 Google L4 offer

"Every DSA book teaches you the same 20 problems. This one teaches you 21 patterns — a totally different level."

S

Staff Engineer, Fintech

🎯 Staff offer at fintech

Testimonials are anonymized composites drawn from user feedback. If you land your offer thanks to this reference, let me know — I collect a monthly "wall of wins".

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Data disclaimer

Google interview kits are curated from public interview reports. Not from Google insider knowledge.