Tekion coding interview
questions, leaked.
20 problems reported across recent Tekion interviews. Top patterns: array, dynamic programming, prefix sum. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Tekion's coding interview hits you with arrays constantly. Of the 20 problems on record, 15 are array-based, and 11 land in the medium-to-hard range. You're not grinding a balanced problem set here; you're prepping for a gauntlet of array manipulation, prefix sums, and dynamic programming. The difficulty skew is real: five hard problems mean you'll face problems like Trapping Rain Water and Split Array Largest Sum, where brute force fails fast. If you blank mid-assessment, StealthCoder runs invisibly and surfaces a working solution in seconds. Your edge is knowing which patterns to drill first and which to treat as a safety net.
Top problems at Tekion
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Count the Number of Infection Sequences | HARD | 100.0 | 33% | Array · Math · Combinatorics |
| 02 | Trapping Rain Water | HARD | 78.1 | 65% | Array · Two Pointers · Dynamic Programming |
| 03 | Split Array Largest Sum | HARD | 71.3 | 58% | Array · Binary Search · Dynamic Programming |
| 04 | Maximum Subarray | MEDIUM | 71.3 | 52% | Array · Divide and Conquer · Dynamic Programming |
| 05 | Two Sum | EASY | 71.3 | 56% | Array · Hash Table |
| 06 | Most Stones Removed with Same Row or Column | MEDIUM | 71.3 | 62% | Hash Table · Depth-First Search · Union Find |
| 07 | Ways to Split Array Into Three Subarrays | MEDIUM | 61.6 | 33% | Array · Two Pointers · Binary Search |
| 08 | Product of the Last K Numbers | MEDIUM | 61.6 | 63% | Array · Math · Design |
| 09 | Meeting Rooms II | MEDIUM | 61.6 | 52% | Array · Two Pointers · Greedy |
| 10 | Word Ladder | HARD | 61.6 | 43% | Hash Table · String · Breadth-First Search |
| 11 | Best Time to Buy and Sell Stock | EASY | 61.6 | 55% | Array · Dynamic Programming |
| 12 | Product of Array Except Self | MEDIUM | 61.6 | 68% | Array · Prefix Sum |
| 13 | Cousins in Binary Tree | EASY | 61.6 | 58% | Tree · Depth-First Search · Breadth-First Search |
| 14 | Spiral Matrix | MEDIUM | 61.6 | 54% | Array · Matrix · Simulation |
| 15 | Find First and Last Position of Element in Sorted Array | MEDIUM | 61.6 | 47% | Array · Binary Search |
| 16 | Best Time to Buy and Sell Stock III | HARD | 61.6 | 51% | Array · Dynamic Programming |
| 17 | Find Peak Element | MEDIUM | 61.6 | 47% | Array · Binary Search |
| 18 | Jump Game | MEDIUM | 61.6 | 39% | Array · Dynamic Programming · Greedy |
| 19 | Is Subsequence | EASY | 61.6 | 48% | Two Pointers · String · Dynamic Programming |
| 20 | Valid Parenthesis String | MEDIUM | 61.6 | 39% | String · Dynamic Programming · Stack |
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 Tekion OA. The proctor cannot see it. Screen share cannot detect it. Made by a working Amazon engineer who got tired of watching qualified friends bomb OAs they'd solve cold in an IDE.
Get StealthCoder- array15 · 75%
- dynamic programming8 · 40%
- prefix sum5 · 25%
- binary search4 · 20%
- greedy4 · 20%
- two pointers4 · 20%
- hash table3 · 15%
- string3 · 15%
- stack2 · 10%
- math2 · 10%
Arrays dominate at 75 percent of the problem distribution, but the real story is the combination: dynamic programming (8 problems), prefix sums (5), and binary search (4) are the force multipliers. Trapping Rain Water, Split Array Largest Sum, and Maximum Subarray are textbook hard problems that test whether you can think in terms of state transitions and boundary conditions, not just iteration. The medium problems like Ways to Split Array Into Three Subarrays and Product of Array Except Self demand prefix-sum fluency. Start there: nail prefix sums and DP recurrence on arrays, then layer in two-pointers and greedy. The five hard problems will expose gaps. That's where StealthCoder becomes your hedge. Even if you haven't drilled combinatorics or monotonic stacks in the week before, you have a real-time backup if the pattern doesn't click during the live assessment.
Companies with similar patterns
If you prepped for Tekion, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Tekion.
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 a working Amazon engineer who got tired of watching qualified friends bomb OAs they'd solve cold in an IDE. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Tekion interview FAQ
What topic should I study first for Tekion's interview?+
Prefix sums and dynamic programming on arrays. Five problems explicitly test prefix sums, and eight test DP. Start with Product of Array Except Self and Ways to Split Array Into Three Subarrays. They teach you the fundamentals fast. Everything else builds on those two patterns.
How many easy problems should I expect?+
Only four out of 20 are easy. Two Sum and Best Time to Buy and Sell Stock are warm-ups. Don't spend more than a day on them. The bulk of the interview lives in medium (11) and hard (5) territory, so shift your focus to those difficulty levels immediately.
Is binary search important for Tekion?+
Yes, but not dominant. Four problems touch binary search, and it's a co-pattern in harder arrays like Split Array Largest Sum. Master it as a tool for optimization, not as a standalone topic. Prefix sums and DP unlock more problems.
What's the hardest problem type I'll face?+
Trapping Rain Water and Split Array Largest Sum are the killers. Both require combining multiple techniques: two-pointers or monotonic stacks for Trapping, and binary search plus DP for Split. If you hit either mid-assessment and freeze, you need a backup. That's exactly the scenario StealthCoder handles.
Should I study graph and tree problems?+
Low priority. Tree and graph problems appear occasionally (Most Stones Removed, Cousins in Binary Tree, Word Ladder), but they're outliers. The interview is array-centric. Spend 80 percent of your time on array fundamentals and 20 percent on graphs and trees if you have time left.