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Real SDE interview question for top companies.

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# What is Hack2hire

### 🚀 Welcome to Hack2Hire’s Interview Prep Hub

This GitHub page is part of **Hack2Hire**, a platform dedicated to helping software engineers prepare effectively for technical interviews — from top-tier tech giants to mid-sized and emerging companies.

We go beyond generic problem-solving by offering **curated question sets**, both **LeetCode-based** and **non-LeetCode questions**, all **organized by company and interview stage**. For non-LeetCode questions, we also provide **detailed solution explanations** to help you understand not just what the answer is, but why it works.

### 📘 What You'll Find Here

- Handpicked **top LeetCode questions by company**
- Real-world **non-LeetCode interview problems** with solution walkthroughs
- Structured insights based on **company, round, and topic**
- Preparation guidance that emphasizes **relevant patterns and signal over noise**

Whether you're preparing for FAANG or fast-growing startups, Hack2Hire helps you focus on what **actually gets asked**, so you can prep with clarity and confidence.

---

### 💬 **Join Our Community**

- [Discord](https://discord.gg/pJ8kBJ8Vfu) — Ask questions, share insights, and connect with other candidates.
- [Reddit](https://www.reddit.com/r/Hack2Hire/) — Discuss interview prep strategies and get updates on question trends.

---

# Company List

### 🧭 Navigation

- [Amazon](#amazon)
- [Google](#google)
- [Meta](#meta)
- [Microsoft](#microsoft)
- [Uber](#uber)
- [Coinbase](#coinbase)
- [DoorDash](#doordash)
- [Confluent](#confluent)
- [Lyft](#lyft)
- [Affirm](#affirm)
- [Robinhood](#robinhood)
- [Yelp](#yelp)
- [Pinterest](#pinterest)
  
## Amazon

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/67be0556b46d2b950531291a?company=AMAZON&type=BLOG)

Here are the top LeetCode problems frequently asked by **Amazon**:

- [127. Word Ladder](https://leetcode.com/problems/word-ladder/)
- [75. Sort Colors](https://leetcode.com/problems/sort-colors/)
- [575. Distribute Candies](https://leetcode.com/problems/distribute-candies/)
- [432. All O'One Data Structure](https://leetcode.com/problems/all-oone-data-structure/)
- [348. Design Tic-Tac-Toe](https://leetcode.com/problems/design-tic-tac-toe/)
- [1152. Analyze User Website Visit Pattern](https://leetcode.com/problems/analyze-user-website-visit-pattern/)
- [2915. Length of the Longest Subsequence That Sums to Target](https://leetcode.com/problems/length-of-the-longest-subsequence-that-sums-to-target/)
- [79. Word Search](https://leetcode.com/problems/word-search/)
- [98. Validate Binary Search Tree](https://leetcode.com/problems/validate-binary-search-tree/)
- [76. Minimum Window Substring](https://leetcode.com/problems/minimum-window-substring/)
- [277. Find the Celebrity](https://leetcode.com/problems/find-the-celebrity/)
- [1258. Synonymous Sentences](https://leetcode.com/problems/synonymous-sentences/)
- [146. LRU Cache](https://leetcode.com/problems/lru-cache/)
- [53. Maximum Subarray](https://leetcode.com/problems/maximum-subarray/)
- [37. Sudoku Solver](https://leetcode.com/problems/sudoku-solver/)
- [662. Maximum Width of Binary Tree](https://leetcode.com/problems/maximum-width-of-binary-tree/)
- [109. Convert Sorted List to Binary Search Tree](https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree/)
- [103. Binary Tree Zigzag Level Order Traversal](https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/)
- [652. Find Duplicate Subtrees](https://leetcode.com/problems/find-duplicate-subtrees/)
- [472. Concatenated Words](https://leetcode.com/problems/concatenated-words/)
- [739. Daily Temperatures](https://leetcode.com/problems/daily-temperatures/)
- [875. Koko Eating Bananas](https://leetcode.com/problems/koko-eating-bananas/)
- [2340. Minimum Adjacent Swaps to Make a Valid Array](https://leetcode.com/problems/minimum-adjacent-swaps-to-make-a-valid-array)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages            |
| ---- | ------------------------------------------------------------ | ----------------- |
| 1    | [Connect Points in 2D Matrix](https://www.hack2hire.com/by-company/content/677593f60d31dc201f712036?company=AMAZON&type=ALGORITHM) | Screening         |
| 2    | [Find Special DNA Sequence Pairs](https://www.hack2hire.com/by-company/content/67707582366afdc1233e4ff6?company=AMAZON&type=ALGORITHM) | OA                |
| 3    | [Maximum Server Health Sum](https://www.hack2hire.com/by-company/content/676efae4b2c9d428b406a286?company=AMAZON&type=ALGORITHM) | OA                |
| 4    | [Smallest Lexicographical Palindrome](https://www.hack2hire.com/by-company/content/6760edb72f1ff3d3c88bf914?company=AMAZON&type=ALGORITHM) | OA                |
| 5    | [Compress N-ary Tree](https://www.hack2hire.com/by-company/content/67e4be5650b60b77022f3860?company=AMAZON&type=ALGORITHM) | Onsite            |
| 6    | [Maximum Stability](https://www.hack2hire.com/by-company/content/67a5725db571d6ff0a4bd239?company=AMAZON&type=ALGORITHM) | OA                |
| 7    | [Find Longest Path in DAG](https://www.hack2hire.com/by-company/content/6775dd632c61a9f93e698b9f?company=AMAZON&type=ALGORITHM) | Onsite            |
| 8    | [Find Lowest Common Manager](https://www.hack2hire.com/by-company/content/67cb45939db31a8671abf92b?company=AMAZON&type=ALGORITHM) | Screening, Onsite |
| 9    | [Pascal Triangle Encryption](https://www.hack2hire.com/by-company/content/67ccd7733363b83a81fc9980?company=AMAZON&type=ALGORITHM) | OA                |
| 10   | [Student Reading Textbook](https://www.hack2hire.com/by-company/content/67801a786fee41e51af73dd9?company=AMAZON&type=ALGORITHM) | OA                |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=AMAZON&type=ALGORITHM) |                   |

---

### Google

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/67be3e99b46d2b950531291c?company=GOOGLE&type=BLOG)

Here are the top LeetCode problems frequently asked by **Google**:

- [224. Basic Calculator](https://leetcode.com/problems/basic-calculator/)
- [806. Number of Lines To Write String](https://leetcode.com/problems/number-of-lines-to-write-string/)
- [1825. Finding MK Average](https://leetcode.com/problems/finding-mk-average/)
- [772. Basic Calculator III](https://leetcode.com/problems/basic-calculator-iii/)
- [88. Merge Sorted Array](https://leetcode.com/problems/merge-sorted-array/)
- [9. Palindrome Number](https://leetcode.com/problems/palindrome-number/)
- [2. Add Two Numbers](https://leetcode.com/problems/add-two-numbers/)
- [15. 3Sum](https://leetcode.com/problems/3sum/)
- [283. Move Zeroes](https://leetcode.com/problems/move-zeroes/)
- [22. Generate Parentheses](https://leetcode.com/problems/generate-parentheses/)
- [27. Remove Element](https://leetcode.com/problems/remove-element/)
- [68. Text Justification](https://leetcode.com/problems/text-justification/)
- [5. Longest Palindromic Substring](https://leetcode.com/problems/longest-palindromic-substring/)
- [26. Remove Duplicates from Sorted Array](https://leetcode.com/problems/remove-duplicates-from-sorted-array/)
- [312. Burst Balloons](https://leetcode.com/problems/burst-balloons/)
- [151. Reverse Words in a String](https://leetcode.com/problems/reverse-words-in-a-string/)
- [198. House Robber](https://leetcode.com/problems/house-robber/)
- [349. Intersection of Two Arrays](https://leetcode.com/problems/intersection-of-two-arrays/)
- [398. Random Pick Index](https://leetcode.com/problems/random-pick-index/)
- [2354. Number of Excellent Pairs](https://leetcode.com/problems/number-of-excellent-pairs/)
- [1800. Maximum Ascending Subarray Sum](https://leetcode.com/problems/maximum-ascending-subarray-sum/)
- [56. Merge Intervals](https://leetcode.com/problems/merge-intervals/)
- [806. Number of Lines To Write String](https://leetcode.com/problems/number-of-lines-to-write-string/)
- [1825. Finding MK Average](https://leetcode.com/problems/finding-mk-average/)
- [200. Number of Islands](https://leetcode.com/problems/number-of-islands)
- [136. Single Number](https://leetcode.com/problems/single-number/)
- [167. Two Sum II - Input Array Is Sorted](https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/)
- [189. Rotate Array](https://leetcode.com/problems/rotate-array/)
- [28. Find the Index of the First Occurrence in a String](https://leetcode.com/problems/find-the-index-of-the-first-occurrence-in-a-string/)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages    |
| ---- | ------------------------------------------------------------ | --------- |
| 1    | [Windowed Average excluding Largest K](https://www.hack2hire.com/by-company/content/67886cfb402dc47b67a1493f?company=GOOGLE&type=ALGORITHM) | Screening |
| 2    | [Highway Checkpoint](https://www.hack2hire.com/by-company/content/677f36a9edc5bbd98ac0ea59?company=GOOGLE&type=ALGORITHM) | Onsite    |
| 3    | [Max Fly Distance](https://www.hack2hire.com/by-company/content/67fd53c9d2adf72ba62b0ec7?company=GOOGLE&type=ALGORITHM) | Onsite    |
| 4    | [Subarray-First Iterator](https://www.hack2hire.com/by-company/content/6769d41711bbd512d60ce760?company=GOOGLE&type=ALGORITHM) | Screening |
| 5    | [Max Sum Between Leaf Nodes](https://www.hack2hire.com/by-company/content/6769d41711bbd512d60ce760?company=GOOGLE&type=ALGORITHM) | OA        |
| 6    | [Employee Shift Timeline Table](https://www.hack2hire.com/by-company/content/67fd4d7dd2adf72ba62b0ec3?company=GOOGLE&type=ALGORITHM) | Onsite    |
| 7    | [Cake Order Fulfillment Check](https://www.hack2hire.com/by-company/content/67c75ead6c89e288437c301f?company=GOOGLE&type=ALGORITHM) | OA        |
| 8    | [Dual Car Destinations](https://www.hack2hire.com/by-company/content/67eaea5f4c9bb801bfd0ef4c?company=GOOGLE&type=ALGORITHM) | OA        |
| 9    | [Date Validator](https://www.hack2hire.com/by-company/content/6764929acc8f5deed53ccd75?company=GOOGLE&type=ALGORITHM) | Onsite    |
| 10   | [Keyboard Jump Challenge](https://www.hack2hire.com/by-company/content/677c3ffa5cbaff553b53b069?company=GOOGLE&type=ALGORITHM) | Screening |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=GOOGLE&type=ALGORITHM) |           |

---

### Meta

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/67e759b867e940fe1ab94fac?company=META&type=BLOG)

Here are the top LeetCode problems frequently asked by **Meta**:

- [162. Find Peak Element](https://leetcode.com/problems/find-peak-element)
- [1249. Minimum Remove to Make Valid Parentheses](https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses)
- [347. Top K Frequent Elements](https://leetcode.com/problems/top-k-frequent-elements)
- [1004. Max Consecutive Ones III](https://leetcode.com/problems/max-consecutive-ones-iii)
- [528. Random Pick with Weight](https://leetcode.com/problems/random-pick-with-weight)
- [50. Pow(x, n)](https://leetcode.com/problems/powx-n)
- [295. Find Median from Data Stream](https://leetcode.com/problems/find-median-from-data-stream)
- [199. Binary Tree Right Side View](https://leetcode.com/problems/binary-tree-right-side-view)
- [324. Wiggle Sort II](https://leetcode.com/problems/wiggle-sort-ii)
- [127. Word Ladder](https://leetcode.com/problems/word-ladder)
- [938. Range Sum of BST](https://leetcode.com/problems/range-sum-of-bst)
- [215. Kth Largest Element in an Array](https://leetcode.com/problems/kth-largest-element-in-an-array)
- [680. Valid Palindrome II](https://leetcode.com/problems/valid-palindrome-ii)
- [1539. Kth Missing Positive Number](https://leetcode.com/problems/kth-missing-positive-number)
- [282. Expression Add Operators](https://leetcode.com/problems/expression-add-operators)
- [88. Merge Sorted Array](https://leetcode.com/problems/merge-sorted-array)
- [23. Merge k Sorted Lists](https://leetcode.com/problems/merge-k-sorted-lists)
- [63. Unique Paths II](https://leetcode.com/problems/unique-paths-ii)
- [22. Generate Parentheses](https://leetcode.com/problems/generate-parentheses)
- [56. Merge Intervals](https://leetcode.com/problems/merge-intervals)
- [408. Valid Word Abbreviation](https://leetcode.com/problems/valid-word-abbreviation)
- [1047. Remove All Adjacent Duplicates In String](https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string)
- [207. Course Schedule](https://leetcode.com/problems/course-schedule)
- [227. Basic Calculator II](https://leetcode.com/problems/basic-calculator-ii)
- [973. K Closest Points to Origin](https://leetcode.com/problems/k-closest-points-to-origin)
- [525. Contiguous Array](https://leetcode.com/problems/contiguous-array)
- [426. Convert Binary Search Tree to Sorted Doubly Linked List](https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list)
- [658. Find K Closest Elements](https://leetcode.com/problems/find-k-closest-elements)
- [314. Binary Tree Vertical Order Traversal](https://leetcode.com/problems/binary-tree-vertical-order-traversal)
- [8. String to Integer (atoi)](https://leetcode.com/problems/string-to-integer-atoi)
- [1123. Lowest Common Ancestor of Deepest Leaves](https://leetcode.com/problems/lowest-common-ancestor-of-deepest-leaves)
- [443. String Compression](https://leetcode.com/problems/string-compression)
- [125. Valid Palindrome](https://leetcode.com/problems/valid-palindrome)
- [339. Nested List Weight Sum](https://leetcode.com/problems/nested-list-weight-sum)
- [987. Vertical Order Traversal of a Binary Tree](https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree)
- [721. Accounts Merge](https://leetcode.com/problems/accounts-merge)
- [1209. Remove All Adjacent Duplicates in String II](https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii)
- [190. Reverse Bits](https://leetcode.com/problems/reverse-bits)
- [543. Diameter of Binary Tree](https://leetcode.com/problems/diameter-of-binary-tree)
- [1060. Missing Element in Sorted Array](https://leetcode.com/problems/missing-element-in-sorted-array)
- [560. Subarray Sum Equals K](https://leetcode.com/problems/subarray-sum-equals-k)
- [249. Group Shifted Strings](https://leetcode.com/problems/group-shifted-strings)
- [21. Merge Two Sorted Lists](https://leetcode.com/problems/merge-two-sorted-lists)
- [236. Lowest Common Ancestor of a Binary Tree](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree)
- [76. Minimum Window Substring](https://leetcode.com/problems/minimum-window-substring)
- [71. Simplify Path](https://leetcode.com/problems/simplify-path)
- [39. Combination Sum](https://leetcode.com/problems/combination-sum)
- [129. Sum Root to Leaf Numbers](https://leetcode.com/problems/sum-root-to-leaf-numbers)
- [346. Moving Average from Data Stream](https://leetcode.com/problems/moving-average-from-data-stream)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages            |
| ---- | ------------------------------------------------------------ | ----------------- |
| 1    | [Find Shortest Unique Prefix](https://www.hack2hire.com/by-company/content/67e4aa9a50b60b77022f3849?company=META&type=ALGORITHM) | Screening         |
| 2    | [Keypad Letter Combination](https://www.hack2hire.com/by-company/content/67e38ccf87527b3f41af78b5?company=META&type=ALGORITHM) | Onsite            |
| 3    | [Find Shortest Path in Matrix](https://www.hack2hire.com/by-company/content/67dcd81b99f4f89b276f1889?company=META&type=ALGORITHM) | Screening, Onsite |
| 4    | [Count Distinct Elements in Window](https://www.hack2hire.com/by-company/content/67e08f3ea59c3d249d3625df?company=META&type=ALGORITHM) | Screening, Onsite |
| 5    | [Split Array with Equal Sum](https://www.hack2hire.com/by-company/content/67db901200e020b60078a44b?company=META&type=ALGORITHM) | Screening         |
| 6    | [Merge Two Interval Lists](https://www.hack2hire.com/by-company/content/67df682a06b62d81733ab892?company=META&type=ALGORITHM) | Onsite            |
| 7    | [Word Pattern Match](https://www.hack2hire.com/by-company/content/67e45b2050b60b77022f382d?company=META&type=ALGORITHM) | Onsite            |
| 8    | [Minimal Board Length for Holes](https://www.hack2hire.com/by-company/content/67d33c395e44a1b0c201ee93?company=META&type=ALGORITHM) | OA, Onsite        |
| 9    | [Minimum Coins to Form All Amounts](https://www.hack2hire.com/by-company/content/67803a256fee41e51af73ddb?company=META&type=ALGORITHM) | Onsite            |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=META&type=ALGORITHM) |                   |

---

### Microsoft

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/67be27f4b46d2b950531291b?company=MICROSOFT&type=BLOG)

Here are the top LeetCode problems frequently asked by **Microsoft**:

- [772. Basic Calculator III](https://leetcode.com/problems/basic-calculator-iii/)
- [2. Add Two Numbers](https://leetcode.com/problems/add-two-numbers/)
- [3. Longest Substring Without Repeating Characters](https://leetcode.com/problems/longest-substring-without-repeating-characters/)
- [9. Palindrome Number](https://leetcode.com/problems/palindrome-number/)
- [12. Integer to Roman](https://leetcode.com/problems/integer-to-roman/)
- [13. Roman to Integer](https://leetcode.com/problems/roman-to-integer/)
- [253. Meeting Rooms II](https://leetcode.com/problems/meeting-rooms-ii/)
- [295. Find Median from Data Stream](https://leetcode.com/problems/find-median-from-data-stream/)
- [348. Design Tic-Tac-Toe](https://leetcode.com/problems/design-tic-tac-toe/)
- [362. Design Hit Counter](https://leetcode.com/problems/design-hit-counter/)
- [15. 3Sum](https://leetcode.com/problems/3sum/)
- [21. Merge Two Sorted Lists](https://leetcode.com/problems/merge-two-sorted-lists/)
- [23. Merge k Sorted Lists](https://leetcode.com/problems/merge-k-sorted-lists/)
- [843. Guess the Word](https://leetcode.com/problems/guess-the-word/)
- [994. Rotting Oranges](https://leetcode.com/problems/rotting-oranges/)
- [31. Next Permutation](https://leetcode.com/problems/next-permutation/)
- [32. Longest Valid Parentheses](https://leetcode.com/problems/longest-valid-parentheses/)
- [48. Rotate Image](https://leetcode.com/problems/rotate-image/)
- [253. Meeting Rooms II](https://leetcode.com/problems/meeting-rooms-ii/)
- [295. Find Median from Data Stream](https://leetcode.com/problems/find-median-from-data-stream/)
- [348. Design Tic-Tac-Toe](https://leetcode.com/problems/design-tic-tac-toe/)
- [54. Spiral Matrix](https://leetcode.com/problems/spiral-matrix/)
- [64. Minimum Path Sum](https://leetcode.com/problems/minimum-path-sum/)
- [103. Binary Tree Zigzag Level Order Traversal](https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/)
- [204. Count Primes](https://leetcode.com/problems/count-primes/)
- [211. Design Add and Search Words Data Structure](https://leetcode.com/problems/design-add-and-search-words-data-structure/)
- [215. Kth Largest Element in an Array](https://leetcode.com/problems/kth-largest-element-in-an-array/)
- [224. Basic Calculator](https://leetcode.com/problems/basic-calculator/)
- [236. Lowest Common Ancestor of a Binary Tree](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/)
- [239. Sliding Window Maximum](https://leetcode.com/problems/sliding-window-maximum/)
- [253. Meeting Rooms II](https://leetcode.com/problems/meeting-rooms-ii/)
- [295. Find Median from Data Stream](https://leetcode.com/problems/find-median-from-data-stream/)
- [348. Design Tic-Tac-Toe](https://leetcode.com/problems/design-tic-tac-toe/)
- [362. Design Hit Counter](https://leetcode.com/problems/design-hit-counter/)
- [380. Insert Delete GetRandom O(1)](https://leetcode.com/problems/insert-delete-getrandom-o1/)
- [443. String Compression](https://leetcode.com/problems/string-compression/)
- [465. Optimal Account Balancing](https://leetcode.com/problems/optimal-account-balancing/)
- [468. Validate IP Address](https://leetcode.com/problems/validate-ip-address/)
- [545. Boundary of Binary Tree](https://leetcode.com/problems/boundary-of-binary-tree/)
- [701. Insert into a Binary Search Tree](https://leetcode.com/problems/insert-into-a-binary-search-tree/)
- [1102. Path With Maximum Minimum Value](https://leetcode.com/problems/path-with-maximum-minimum-value/)
- [1244. Design A Leaderboard](https://leetcode.com/problems/design-a-leaderboard/)
- [1258. Synonymous Sentences](https://leetcode.com/problems/synonymous-sentences/)
- [1545. Find Kth Bit in Nth Binary String](https://leetcode.com/problems/find-kth-bit-in-nth-binary-string/)
- [236. Lowest Common Ancestor of a Binary Tree](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/)
- [239. Sliding Window Maximum](https://leetcode.com/problems/sliding-window-maximum/)
- [253. Meeting Rooms II](https://leetcode.com/problems/meeting-rooms-ii/)
- [1570. Dot Product of Two Sparse Vectors](https://leetcode.com/problems/dot-product-of-two-sparse-vectors/)
- [1730. Shortest Path to Get Food](https://leetcode.com/problems/shortest-path-to-get-food/)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages            |
| ---- | ------------------------------------------------------------ | ----------------- |
| 1    | [Keypad Letter Combination](https://www.hack2hire.com/by-company/content/67e38ccf87527b3f41af78b5?company=MICROSOFT&type=ALGORITHM) | Onsite            |
| 2    | [Valid Time Combinations](https://www.hack2hire.com/by-company/content/6796b99ab10bc587828f27af?company=MICROSOFT&type=ALGORITHM) | OA                |
| 3    | [Max Square from Mixed Tiles](https://www.hack2hire.com/by-company/content/67a96c9b017965d66059a735?company=MICROSOFT&type=ALGORITHM) | OA                |
| 4    | [Binary Search Variation](https://www.hack2hire.com/by-company/content/6795546b010c9ed2f849b1f6?company=MICROSOFT&type=ALGORITHM) | Onsite            |
| 5    | [Integer to English Converter](https://www.hack2hire.com/by-company/content/678882de402dc47b67a14949?company=MICROSOFT&type=ALGORITHM) | Onsite            |
| 6    | [Calculate Total Waiting Time](https://www.hack2hire.com/by-company/content/6796f78bb10bc587828f27b1?company=MICROSOFT&type=ALGORITHM) | OA                |
| 7    | [Calculate Total Waiting Time](https://www.hack2hire.com/by-company/content/6796f78bb10bc587828f27b1?company=MICROSOFT&type=ALGORITHM) | OA                |
| 8    | [Recipes From Ingredients](https://www.hack2hire.com/by-company/content/67a43ebb5141b0ac3b8be4de?company=MICROSOFT&type=ALGORITHM) | OA                |
| 9    | [Largest Common BST Value](https://www.hack2hire.com/by-company/content/67708803366afdc1233e4ffa?company=MICROSOFT&type=ALGORITHM) | Onsite, Screening |
| 10   | [Find Word Path](https://www.hack2hire.com/by-company/content/6795a7db010c9ed2f849b1fc?company=MICROSOFT&type=ALGORITHM) | Onsite            |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=MICROSOFT&type=ALGORITHM) |                   |

---

### Uber

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/67bdf4f37d7a8e8082f368aa?company=UBER&type=BLOG)

Here are the top LeetCode problems frequently asked by **Uber**:

- [380. Insert Delete GetRandom O(1)](https://leetcode.com/problems/insert-delete-getrandom-o1/)
- [97. Interleaving String](https://leetcode.com/problems/interleaving-string/)
- [564. Find the Closest Palindrome](https://leetcode.com/problems/find-the-closest-palindrome/)
- [621. Task Scheduler](https://leetcode.com/problems/task-scheduler/)
- [146. LRU Cache](https://leetcode.com/problems/lru-cache/)
- [269. Alien Dictionary](https://leetcode.com/problems/alien-dictionary/)
- [239. Sliding Window Maximum](https://leetcode.com/problems/sliding-window-maximum/)
- [815. Bus Routes](https://leetcode.com/problems/bus-routes/)
- [57. Insert Interval](https://leetcode.com/problems/insert-interval/)
- [680. Valid Palindrome II](https://leetcode.com/problems/valid-palindrome-ii/)
- [153. Find Minimum in Rotated Sorted Array](https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/)
- [230. Kth Smallest Element in a BST](https://leetcode.com/problems/kth-smallest-element-in-a-bst/)
- [977. Squares of a Sorted Array](https://leetcode.com/problems/squares-of-a-sorted-array/)
- [716. Max Stack](https://leetcode.com/problems/max-stack/)
- [238. Product of Array Except Self](https://leetcode.com/problems/product-of-array-except-self/)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages            |
| ---- | ------------------------------------------------------------ | ----------------- |
| 1    | [Currency Exchange](https://www.hack2hire.com/by-company/content/67895195402dc47b67a14950?company=UBER&type=ALGORITHM) | Screening, Onsite |
| 2    | [Find Robots Position](https://www.hack2hire.com/by-company/content/6789faf011318cc872dd83f2?company=UBER&type=ALGORITHM) | Screening, Onsite |
| 3    | [Longest Valid Parentheses](https://www.hack2hire.com/by-company/content/6789bea411318cc872dd83ed?company=UBER&type=ALGORITHM) | Onsite            |
| 4    | [Next Greater Palindrome](https://www.hack2hire.com/by-company/content/67883de3e20f8f324213c2a1?company=UBER&type=ALGORITHM) | Onsite            |
| 5    | [Substring Wrapper](https://www.hack2hire.com/by-company/content/67882765e20f8f324213c29f?company=UBER&type=ALGORITHM) | Screening         |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=UBER&type=ALGORITHM) |                   |

---

### Coinbase

**Top Non-Leetcode Question**

|      | Question                                                     | Stages            |
| ---- | ------------------------------------------------------------ | ----------------- |
| 1    | [Currency Exchange](https://www.hack2hire.com/by-company/content/67895195402dc47b67a14950?company=COINBASE&type=ALGORITHM) | Screening, Onsite |
| 2    | [Minimize Capital Gains Tax](https://www.hack2hire.com/by-company/content/679698ffb10bc587828f27ad?company=COINBASE&type=ALGORITHM) | Onsite            |
| 3    | [Generate Random NFT](https://www.hack2hire.com/by-company/content/6791aa8374ebe9de6650635b?company=COINBASE&type=ALGORITHM) | Onsite            |
| 4    | [Account Balance Transfer](https://www.hack2hire.com/by-company/content/6793090c6828628f54397d9a?company=COINBASE&type=ALGORITHM) | Onsite            |
| 5    | [Iterator with Filter](https://www.hack2hire.com/by-company/content/678dc014fa7ce9616e190fb6?company=COINBASE&type=ALGORITHM) | Screening         |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=COINBASE&type=ALGORITHM) |                   |

---

### **DoorDash**

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/67bd5fbd7d7a8e8082f368a7?company=DOORDASH&type=BLOG)

Here are the top LeetCode problems frequently asked by **DoorDash**:

- [1235. Maximum Profit in Job Scheduling](https://leetcode.com/problems/maximum-profit-in-job-scheduling/)
- [224. Basic Calculator](https://leetcode.com/problems/basic-calculator/)
- [1011. Capacity To Ship Packages Within D Days](https://leetcode.com/problems/capacity-to-ship-packages-within-d-days/)
- [859. Buddy Strings](https://leetcode.com/problems/buddy-strings/)
- [875. Koko Eating Bananas](https://leetcode.com/problems/koko-eating-bananas/)
- [790. Domino and Tromino Tiling](https://leetcode.com/problems/domino-and-tromino-tiling/)
- [826. Most Profit Assigning Work](https://leetcode.com/problems/most-profit-assigning-work/)
- [329. Longest Increasing Path in a Matrix](https://leetcode.com/problems/longest-increasing-path-in-a-matrix/)
- [124. Binary Tree Maximum Path Sum](https://leetcode.com/problems/binary-tree-maximum-path-sum/)
- [1790. Check if One String Swap Can Make Strings Equal](https://leetcode.com/problems/check-if-one-string-swap-can-make-strings-equal/)
- [1347. Minimum Number of Steps to Make Two Strings Anagram](https://leetcode.com/problems/minimum-number-of-steps-to-make-two-strings-anagram/)
- [1166. Design File System](https://leetcode.com/problems/design-file-system/)
- [286. Walls and Gates](https://leetcode.com/problems/walls-and-gates/)
- [1143. Longest Common Subsequence](https://leetcode.com/problems/longest-common-subsequence/)
- [827. Making A Large Island](https://leetcode.com/problems/making-a-large-island/)
- [31. Next Permutation](https://leetcode.com/problems/next-permutation/)
- [1268. Search Suggestions System](https://leetcode.com/problems/search-suggestions-system/)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages    |
| ---- | ------------------------------------------------------------ | --------- |
| 1    | [Find the Nearest City](https://www.hack2hire.com/by-company/content/6781bdae3cd890ccd3798fbf?company=DOORDASH&type=ALGORITHM) | Onsite    |
| 2    | [Construct Restaurant Daily Menu](https://www.hack2hire.com/by-company/content/6782b2763cd890ccd3798fc2?company=DOORDASH&type=ALGORITHM) | Screening |
| 3    | [Calculate Dasher Salary](https://www.hack2hire.com/by-company/content/67831497d0faf7ec64cc3ad5?company=DOORDASH&type=ALGORITHM) | Screening |
| 4    | [Design Path Key Value Store](https://www.hack2hire.com/by-company/content/678334c4d0faf7ec64cc3ad7?company=DOORDASH&type=ALGORITHM) | Screening |
| 5    | [Dasher Payment Model](https://www.hack2hire.com/by-company/content/678470750e1dbb6a09385780?company=DOORDASH&type=ALGORITHM) | Screening |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=DOORDASH&type=ALGORITHM) |           |

---

### Confluent

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/67be402bb46d2b950531291d?company=CONFLUENT&type=BLOG)

Here are the top LeetCode problems frequently asked by **Confluent**:

- [36. Valid Sudoku](https://leetcode.com/problems/valid-sudoku)
- [37. Sudoku Solver](https://leetcode.com/problems/sudoku-solver)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages            |
| ---- | ------------------------------------------------------------ | ----------------- |
| 1    | [Design Infinite Queue with GetRandom O(1)](https://www.hack2hire.com/by-company/question-overview?company=CONFLUENT&type=ALGORITHM) | Onsite            |
| 2    | [Windowed Key-Value Store](https://www.hack2hire.com/by-company/content/67775e328df5ec401f786db1?company=CONFLUENT&type=ALGORITHM) | OA                |
| 3    | [Variadic Function Matching](https://www.hack2hire.com/by-company/content/677b2d9378175fce2ecdfc0f?company=CONFLUENT&type=ALGORITHM) | Screening         |
| 4    | [Implement Inverted Index](https://www.hack2hire.com/by-company/content/6779fd08dcf91f8e3c1c3111?company=CONFLUENT&type=ALGORITHM) | Onsite            |
| 5    | [Subset Sum Equals K](https://www.hack2hire.com/by-company/content/677c87c55cbaff553b53b06d?company=CONFLUENT&type=ALGORITHM) | Onsite, Screening |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=CONFLUENT&type=ALGORITHM) |                   |

---

### Lyft

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/67bdf2147d7a8e8082f368a9?company=LYFT&type=BLOG)

Here are the top LeetCode problems frequently asked by **Lyft**:

- [994. Rotting Oranges](https://leetcode.com/problems/rotting-oranges/)
- [981. Time Based Key-Value Store](https://leetcode.com/problems/time-based-key-value-store/)
- [76. Minimum Window Substring](https://leetcode.com/problems/minimum-window-substring/)
- [735. Asteroid Collision](https://leetcode.com/problems/asteroid-collision/)
- [157. Read N Characters Given Read4](https://leetcode.com/problems/read-n-characters-given-read4/)
- [158. Read N Characters Given Read4 II - Call multiple times](https://leetcode.com/problems/read-n-characters-given-read4-ii-call-multiple-times/)
- [642. Design Search Autocomplete System](https://leetcode.com/problems/design-search-autocomplete-system/)
- [155. Min Stack](https://leetcode.com/problems/min-stack/)
- [716. Max Stack](https://leetcode.com/problems/max-stack/)
- [69. Sqrt(x)](https://leetcode.com/problems/sqrtx/)
- [426. Convert Binary Search Tree to Sorted Doubly Linked List](https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list/)
- [42. Trapping Rain Water](https://leetcode.com/problems/trapping-rain-water/)
- [238. Product of Array Except Self](https://leetcode.com/problems/product-of-array-except-self/)
- [200. Number of Islands](https://leetcode.com/problems/number-of-islands/)
- [91. Decode Ways](https://leetcode.com/problems/decode-ways/)
- [1268. Search Suggestions System](https://leetcode.com/problems/search-suggestions-system/)
- [727. Minimum Window Subsequence](https://leetcode.com/problems/minimum-window-subsequence/)
- [415. Add Strings](https://leetcode.com/problems/add-strings/)
- [23. Merge k Sorted Lists](https://leetcode.com/problems/merge-k-sorted-lists/)
- [124. Binary Tree Maximum Path Sum](https://leetcode.com/problems/binary-tree-maximum-path-sum/)
- [365. Water and Jug Problem](https://leetcode.com/problems/water-and-jug-problem/)
- [1382. Balance a Binary Search Tree](https://leetcode.com/problems/balance-a-binary-search-tree)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages            |
| ---- | ------------------------------------------------------------ | ----------------- |
| 1    | [Job Scheduler](https://www.hack2hire.com/by-company/content/679f05d8e818521cacd22470?company=LYFT&type=ALGORITHM) | Screening         |
| 2    | [MultiStream Reader](https://www.hack2hire.com/by-company/content/67b2cb8275074948935624c6?company=LYFT&type=ALGORITHM) | Screening, Onsite |
| 3    | [Design In-Memory Key-Value Database](https://www.hack2hire.com/by-company/content/67a19b2ab41c4108d8ccb3d3?company=LYFT&type=ALGORITHM) | Onsite            |
| 4    | [Design Query Pagination](https://www.hack2hire.com/by-company/content/6792ce956828628f54397d98?company=LYFT&type=ALGORITHM) | Onsite            |
| 5    | [Alien Base Attack](https://www.hack2hire.com/by-company/content/6798653e4b8bccaed413d52c?company=LYFT&type=ALGORITHM) | Screening         |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=LYFT&type=ALGORITHM) |                   |

---

### Affirm

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/67bdee5f7d7a8e8082f368a8?company=AFFIRM&type=BLOG)

Here are the top LeetCode problems frequently asked by **Affirm**:

- [322. Coin Change](https://leetcode.com/problems/coin-change/)
- [380. Insert Delete GetRandom O(1)](https://leetcode.com/problems/insert-delete-getrandom-o1/)
- [465. Optimal Account Balancing](https://leetcode.com/problems/optimal-account-balancing/)
- [111. Minimum Depth of Binary Tree](https://leetcode.com/problems/minimum-depth-of-binary-tree/)
- [102. Binary Tree Level Order Traversal](https://leetcode.com/problems/binary-tree-level-order-traversal/)
- [242. Valid Anagram](https://leetcode.com/problems/valid-anagram/)
- [49. Group Anagrams](https://leetcode.com/problems/group-anagrams/)
- [217. Contains Duplicate](https://leetcode.com/problems/contains-duplicate/)
- [146. LRU Cache](https://leetcode.com/problems/lru-cache/)
- [713. Subarray Product Less Than K](https://leetcode.com/problems/subarray-product-less-than-k/)
- [126. Word Ladder II](https://leetcode.com/problems/word-ladder-ii/)
- [362. Design Hit Counter](https://leetcode.com/problems/design-hit-counter/)
- [3076. Shortest Uncommon Substring in an Array](https://leetcode.com/problems/shortest-uncommon-substring-in-an-array)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages    |
| ---- | ------------------------------------------------------------ | --------- |
| 1    | [End Of Day Balance](https://www.hack2hire.com/by-company/content/6769d68d11bbd512d60ce761?company=AFFIRM&type=ALGORITHM) | Onsite    |
| 2    | [High Correlation Seller](https://www.hack2hire.com/by-company/content/6768bf0900d569e371e007eb?company=AFFIRM&type=ALGORITHM) | Screening |
| 3    | [Design Card Game](https://www.hack2hire.com/by-company/content/67841e26d0faf7ec64cc3adc?company=AFFIRM&type=ALGORITHM) | Onsite    |
| 4    | [Persistent Stack](https://www.hack2hire.com/by-company/content/677f4d556fee41e51af73dd5?company=AFFIRM&type=ALGORITHM) | Screening |
| 5    | [Prefix to Postfix](https://www.hack2hire.com/by-company/content/678069276fee41e51af73ddd?company=AFFIRM&type=ALGORITHM) | OA        |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=AFFIRM&type=ALGORITHM) |           |

---

### Robinhood

**Top Non-Leetcode Question**

|      | Question                                                     | Stages            |
| ---- | ------------------------------------------------------------ | ----------------- |
| 1    | [Find Maximum Trade Shares](https://www.hack2hire.com/by-company/content/67e4c55150b60b77022f3867?company=ROBINHOOD&type=ALGORITHM) | Screening, Onsite |
| 2    | [Maximum Multiplier Path](https://www.hack2hire.com/by-company/content/67e4438350b60b77022f381b?company=ROBINHOOD&type=ALGORITHM) | Onsite            |
| 3    | [Offset Commit](https://www.hack2hire.com/by-company/content/67eb15404c9bb801bfd0ef6e?company=ROBINHOOD&type=ALGORITHM) | Screening         |
| 4    | [Employee Referral Program](https://www.hack2hire.com/by-company/content/67da3d822857a70e1201339c?company=ROBINHOOD&type=ALGORITHM) | Screening, Onsite |
| 5    | [Margin Call](https://www.hack2hire.com/by-company/content/67d25b3c5e44a1b0c201ee78?company=ROBINHOOD&type=ALGORITHM) | Screening, Onsite |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=ROBINHOOD&type=ALGORITHM) |                   |

---

### Yelp

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/6805722d22187a36900d482f?company=YELP&type=BLOG)

Here are the top LeetCode problems frequently asked by **Yelp**:

- [252. Meeting Rooms](https://leetcode.com/problems/meeting-rooms)
- [253. Meeting Rooms II](https://leetcode.com/problems/meeting-rooms-ii)
- [273. Integer to English Words](https://leetcode.com/problems/integer-to-english-words)
- [75. Sort Colors](https://leetcode.com/problems/sort-colors)
- [146. LRU Cache](https://leetcode.com/problems/lru-cache)

**Top Non-Leetcode Question**

|      | Question                                                     | Stages            |
| ---- | ------------------------------------------------------------ | ----------------- |
| 1    | [Prefix Search I](https://www.hack2hire.com/by-company/content/67f56cb283ba2e5f057e6df8?company=YELP&type=ALGORITHM) | Screening, Onsite |
| 2    | [Find Destination Node](https://www.hack2hire.com/by-company/content/67fab1d5ba41b3368f4e585f?company=YELP&type=ALGORITHM) | Screening, Onsite |
| 3    | [Top Love Message Receivers](https://www.hack2hire.com/by-company/content/67f9968855e478de52401ddc?company=YELP&type=ALGORITHM) | Screening, Onsite |
| 4    | [N-gram Split](https://www.hack2hire.com/by-company/content/67fad653ba41b3368f4e5869?company=YELP&type=ALGORITHM) | Screening, Onsite |
| 5    | [Count Alert Triggers](https://www.hack2hire.com/by-company/content/67ff3b3ca19f45c95d405689?company=YELP&type=ALGORITHM) | Screening, Onsite |
|      | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=YELP&type=ALGORITHM) |                   |

### Pinterest

[**Top Leetcode Question**](https://www.hack2hire.com/by-company/content/683a455bce21c7044910c4da?company=PINTEREST&type=BLOG)

Here are the top LeetCode problems frequently asked by **Pinterest**:

- [38. Count and Say](https://leetcode.com/problems/count-and-say/)
- [136. Single Number](https://leetcode.com/problems/single-number/)
- [215. Kth Largest Element in an Array](https://leetcode.com/problems/kth-largest-element-in-an-array/)
- [282. Expression Add Operators](https://leetcode.com/problems/expression-add-operators/)
- [432. All O`one Data Structure](https://leetcode.com/problems/all-oone-data-structure/)
- [528. Random Pick with Weight](https://leetcode.com/problems/random-pick-with-weight/)
- [767. Reorganize String](https://leetcode.com/problems/reorganize-string/)
- [815. Bus Routes](https://leetcode.com/problems/bus-routes/)
- [1055. Shortest Way to Form String](https://leetcode.com/problems/shortest-way-to-form-string/)
- [1235. Maximum Profit in Job Scheduling](https://leetcode.com/problems/maximum-profit-in-job-scheduling/)
- [1293. Shortest Path in a Grid with Obstacles Elimination](https://leetcode.com/problems/shortest-path-in-a-grid-with-obstacles-elimination/)
- [2302. Count Subarrays With Score Less Than K](https://leetcode.com/problems/count-subarrays-with-score-less-than-k/)

**Top Non-Leetcode Question**

|  | Question | Stages |
| --- | --- | --- |
| 1 | [Reverse Count and Say](https://www.hack2hire.com/by-company/content/67f56cb283ba2e5f057e6df8?company=YELP&type=ALGORITHM) | Screening |
| 2 | [Escape Room](https://www.hack2hire.com/by-company/content/67fab1d5ba41b3368f4e585f?company=YELP&type=ALGORITHM) | Onsite |
| 3 | [Spam Caller Counter](https://www.hack2hire.com/by-company/content/67f9968855e478de52401ddc?company=YELP&type=ALGORITHM) | Onsite |
| 4 | [Find Restaurant Intervals](https://www.hack2hire.com/by-company/content/6833ebf4c7e9643eccb00bf3?company=PINTEREST&type=ALGORITHM) | Screening |
| 5 | [Max Non-overlapping Tasks](https://www.hack2hire.com/by-company/content/67ff3b3ca19f45c95d405689?company=YELP&type=ALGORITHM) | Onsite |
|  | [[→ View More Questions]](https://www.hack2hire.com/by-company/question-overview?company=YELP&type=ALGORITHM) |  |

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