Trexquant coding interview
questions, leaked.
5 problems reported across recent Trexquant interviews. Top patterns: array, hash table, matrix. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Trexquant's coding assessment is all medium-difficulty, no gimmes. Five problems reported across array manipulation, hash-table work, and matrix traversal. You're not grinding a marathon here, but every problem expects clean pattern recognition and solid implementation. If you hit a wall mid-OA on spiral matrices or hash-table collisions, StealthCoder runs invisibly and surfaces a working solution in seconds, keeping you moving while the proctor sees nothing but your typing.
Top problems at Trexquant
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Max Difference You Can Get From Changing an Integer | MEDIUM | 100.0 | 49% | Math · Greedy |
| 02 | Spiral Matrix | MEDIUM | 89.2 | 54% | Array · Matrix · Simulation |
| 03 | Brick Wall | MEDIUM | 89.2 | 56% | Array · Hash Table |
| 04 | Letter Combinations of a Phone Number | MEDIUM | 89.2 | 64% | Hash Table · String · Backtracking |
| 05 | 3Sum | MEDIUM | 89.2 | 37% | Array · Two Pointers · Sorting |
Frequencies derived from public community-tagged interview reports. Click a row to view on LeetCode.
You have a week, maybe less. You can't out-grind the list above. StealthCoder runs invisibly during the actual Trexquant OA. The proctor cannot see it. Screen share cannot detect it. Made by an Amazon engineer who watched the leaked-problem repo become an industry secret. He decided you should have it too.
Get StealthCoder- array3 · 60%
- hash table2 · 40%
- matrix1 · 20%
- simulation1 · 20%
- math1 · 20%
- greedy1 · 20%
- string1 · 20%
- backtracking1 · 20%
- two pointers1 · 20%
- sorting1 · 20%
Arrays dominate at three problems, with hash-table work showing up twice. The spread tells you this: Trexquant cares about indexed access, collision handling, and spatial reasoning. Spiral Matrix and 3Sum are the anchor patterns. You'll also see greedy logic (Max Difference), backtracking (Letter Combinations), and two-pointer technique (3Sum). All medium means no time for hesitation. Drill array iteration, hash lookups, and the two-pointer pattern first. Skip the hard-problem rabbit hole entirely. When you sit down for the assessment, StealthCoder is your hedge for the one pattern that didn't click in prep, whatever it is.
Companies with similar patterns
If you prepped for Trexquant, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Trexquant.
Memorizing every problem above in a week is a fantasy. StealthCoder is the hedge: an AI overlay that's invisible during screen share. It reads the problem on screen and surfaces a working solution in under 2 seconds. Made by an Amazon engineer who watched the leaked-problem repo become an industry secret. He decided you should have it too. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Trexquant interview FAQ
Should I spend equal time on arrays and hash tables for Trexquant?+
No. Arrays appear in 60 percent of reported problems here, hash tables in 40. Start with array patterns: iteration, indexing, matrix traversal (Spiral Matrix is a lock). Hash-table prep comes second, but don't skip it. Brick Wall and Letter Combinations both rely on it.
Is two-pointer technique essential for this assessment?+
It appears once in 3Sum, a medium-difficulty staple. It's not as critical as array work, but you can't afford to blank on it. Treat it as third-priority after arrays and hash tables. One or two clean runs through the pattern will stick.
How much time should I spend on backtracking before the OA?+
Letter Combinations shows up here, but it's a single medium problem and backtracking is lower frequency in the overall set. Master the backtracking loop for this problem specifically, then move on. Don't overinvest in deep backtracking theory.
What's the biggest gap in my prep if I only drill arrays?+
You'll miss hash-table collision and lookup patterns that Brick Wall and Letter Combinations demand. Arrays alone won't cover string handling or greedy logic either. Budget time to cover all five reported problems at least once.
Can I skip matrix and simulation topics?+
Spiral Matrix is reported in their assessment and combines both. It's medium-difficulty and a real choke point if you haven't done it before. Spend an hour on the spiral traversal pattern. You need it.