TuSimple coding interview
questions, leaked.
4 problems reported across recent TuSimple interviews. Top patterns: array, hash table, prefix sum. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
TuSimple interviews are lean and brutal. Four problems in their reported dataset, split evenly between medium and hard. You're looking at array manipulation as the baseline (appears in 3 of 4), hash tables as the secondary layer, and one medium problem that chains array, hash-table, and prefix-sum together. Most candidates who walk in unprepared hit a wall on the hard problems. If you blank mid-assessment, StealthCoder runs invisibly in the background and surfaces a working solution in seconds, invisible to the proctor. You need to know what's actually going to show up.
Top problems at TuSimple
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Intervals Between Identical Elements | MEDIUM | 100.0 | 45% | Array · Hash Table · Prefix Sum |
| 02 | Count the Number of Good Subsequences | MEDIUM | 100.0 | 51% | Hash Table · Math · String |
| 03 | Number of Ways to Earn Points | HARD | 100.0 | 59% | Array · Dynamic Programming |
| 04 | Maximum Good People Based on Statements | HARD | 100.0 | 51% | Array · Backtracking · Bit Manipulation |
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 TuSimple OA. The proctor cannot see it. Screen share cannot detect it. Made for the engineer who has done the work but might still blank with a webcam pointed at him.
Get StealthCoder- array3 · 75%
- hash table2 · 50%
- prefix sum1 · 25%
- math1 · 25%
- string1 · 25%
- combinatorics1 · 25%
- counting1 · 25%
- dynamic programming1 · 25%
- backtracking1 · 25%
- bit manipulation1 · 25%
Arrays dominate TuSimple's real problems. Three of the four top problems lean on array patterns, with hash tables appearing in at least two. The difficulty split is clean: two mediums that test data-structure literacy and fast indexing, two hards that escalate into dynamic programming and backtracking. Prefix-sum shows up once but it's critical when it does. Math and combinatorics appear in the subsequence problem, which is a curveball if you haven't prepped it. The enumeration and bit-manipulation problem is pure constraint-satisfaction under pressure. Study array indexing and hash-table lookup speed first, because that's what unlocks the medium tier. Then drill the two hard problems until the patterns feel automatic. StealthCoder is your hedge for whatever pattern you didn't recognize fast enough on the live OA.
Companies with similar patterns
If you prepped for TuSimple, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass TuSimple.
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 for the engineer who has done the work but might still blank with a webcam pointed at him. Works on HackerRank, CodeSignal, CoderPad, and Karat.
TuSimple interview FAQ
How many array problems should I solve before a TuSimple OA?+
Three of the four top problems are array-heavy. Solve at least 15 to 20 array manipulation problems, focusing on indexing, two-pointer traversal, and interval logic. TuSimple tests array fluency hard and fast. Don't move on to other topics until array patterns are automatic.
Is hash-table enough to pass the TuSimple assessment?+
No. Hash tables appear in two of the four top problems, but they're never the only tool. You need hash tables plus arrays, or hash tables plus math. Study hash-table problems that require secondary data structures or counting logic, not standalone lookups.
What's the hardest topic I'll hit at TuSimple?+
Dynamic programming and backtracking both appear in the hard tier. DP problem involves earning points across constraints. Backtracking problem involves statement validation and enumeration. If you haven't touched DP, start there. Backtracking is the second wall.
Should I prep prefix-sum before my TuSimple OA?+
Yes. Prefix-sum appears once in the reported problems, bundled with array and hash-table logic in a medium-difficulty problem. It's not a dominant pattern, but skipping it leaves a blind spot. Spend 2 to 3 hours drilling prefix-sum once you're solid on arrays.
How long should I prep before a TuSimple interview?+
With four problems and a medium-hard split, two weeks is realistic if you can put in 10 to 15 hours per week. Start with arrays and hash tables, move into the two hard patterns by week two. If you have one week, focus only on the four reported problems and let StealthCoder cover the gaps you miss live.