Problem database last updated: June 20, 2025
4 problems · 0 Easy, 3 Medium, 1 Hard · Ranked #300 of 458
0 Easy
0% · avg 23%
3 Medium
75% · avg 59%
1 Hard
25% · avg 18%
Based on 4 reported problems, Liftoff interviews are slightly harder than average - 25% Hard vs 18% across all companies. The majority (75%) of questions are Medium difficulty, which is typical for companies that want to see solid fundamentals without excessive trick questions.
The most common topics are array (75%), matrix (25%), simulation (25%), math (25%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Diagonal Traverse Given an m x n matrix mat, return an array of all the elements of the array in a diagonal order. | Medium | Very Likely | arraymatrixsimulation | Solve |
Random Pick with Weight You are given a 0-indexed array of positive integers w where w[i] describes the weight of the ith index. | Medium | Very Likely | arraymathbinary-search | Solve |
N-Queens II The n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each other. | Hard | Very Likely | backtracking | Solve |
Diagonal Traverse II Given a 2D integer array nums, return all elements of nums in diagonal order as shown in the below images. | Medium | Very Likely | arraysortingheap-priority-queue | Solve |
Diagonal Traverse
SolveGiven an m x n matrix mat, return an array of all the elements of the array in a diagonal order.
Random Pick with Weight
SolveYou are given a 0-indexed array of positive integers w where w[i] describes the weight of the ith index.
N-Queens II
SolveThe n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each other.
Diagonal Traverse II
SolveGiven a 2D integer array nums, return all elements of nums in diagonal order as shown in the below images.
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Liftoff interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Liftoff interviews focus heavily on array, matrix, simulation problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. Liftoff interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
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Liftoff has been reported to ask 4 distinct coding problems. The most common topics are array, matrix, simulation. 0 are Easy difficulty, 3 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 4 reported problems, Liftoff interviews are slightly harder than average - 25% Hard vs 18% across all companies. 75% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: array, matrix, simulation. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
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