Axon coding interview
questions, leaked.
7 problems reported across recent Axon interviews. Top patterns: string, hash table, array. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Axon's coding interview skews easy to medium, but don't let that fool you. Seven problems reported, two easy and five medium, with no hard rounds means they're testing pattern recognition and clean implementation under pressure. Strings dominate the signal (four appearances), followed by hash tables, arrays, and math. You're looking at design questions that require you to think about data structures in real time. If you hit a wall on the live assessment, StealthCoder runs invisibly and surfaces a working solution in seconds, letting you stay in the flow.
Top problems at Axon
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Time Based Key-Value Store | MEDIUM | 100.0 | 49% | Hash Table · String · Binary Search |
| 02 | Insert Delete GetRandom O(1) | MEDIUM | 91.4 | 55% | Array · Hash Table · Math |
| 03 | Valid Palindrome | EASY | 70.6 | 51% | Two Pointers · String |
| 04 | Number of Islands | MEDIUM | 70.6 | 62% | Array · Depth-First Search · Breadth-First Search |
| 05 | K Closest Points to Origin | MEDIUM | 62.0 | 68% | Array · Math · Divide and Conquer |
| 06 | Roman to Integer | EASY | 62.0 | 65% | Hash Table · Math · String |
| 07 | Edit Distance | MEDIUM | 62.0 | 59% | String · Dynamic Programming |
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 Axon OA. The proctor cannot see it. Screen share cannot detect it. Built by an engineer who got tired of watching his cohort grind for six months and still get filtered at the OA stage.
Get StealthCoder- string4 · 57%
- hash table3 · 43%
- array3 · 43%
- math3 · 43%
- design2 · 29%
- binary search1 · 14%
- randomized1 · 14%
- divide and conquer1 · 14%
- geometry1 · 14%
- sorting1 · 14%
String manipulation is your foundation here. Valid Palindrome and Roman to Integer are classics that test your comfort with character work and edge cases. But Axon isn't just asking surface-level string problems. Time Based Key-Value Store and Insert Delete GetRandom O(1) demand you design actual systems with hash tables, binary search, and randomization. Number of Islands and K Closest Points round out the set with graph traversal and geometric math. The medium cluster is tight, which means precision matters more than speed. Drill strings and hash-table design patterns first, then spend time on the hybrid problems that mix multiple topics. During your live assessment, StealthCoder is your hedge if a design question pivots into unfamiliar territory.
Companies with similar patterns
If you prepped for Axon, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Axon.
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. Built by an engineer who got tired of watching his cohort grind for six months and still get filtered at the OA stage. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Axon interview FAQ
Should I focus on strings first for Axon's interview?+
Yes. Strings appear in four of the top problems, including both easy rounds. Valid Palindrome and Roman to Integer are your quick wins. But don't just solve them once. Understand edge cases, two-pointer logic, and hash-table lookups for character counts. Then move to the harder string problems like Edit Distance and the string component of Time Based Key-Value Store.
How much design-pattern knowledge do I need?+
More than typical. Two of Axon's top problems (Time Based Key-Value Store and Insert Delete GetRandom O(1)) require you to design a system, not just write a function. You need to think about data-structure tradeoffs, insertion/deletion time, and how to balance multiple constraints. Spend time on these two specifically before your assessment.
Is it worth studying hard problems if Axon's list has none?+
Not for Axon specifically. All five medium problems are algorithmic but not brutal. Hash tables, arrays, and basic graph traversal will carry you. The value is in nailing implementation details and handling edge cases cleanly on medium-difficulty code, not in grinding LeetCode hards.
How do I prepare for the math and geometry topics?+
They're secondary here (math shows up in three problems, geometry in one). Roman to Integer teaches you hash-table math basics. K Closest Points teaches geometry and quickselect. Don't spend a week on them. Get familiar with distance formulas and how to use heaps for top-k problems, then move on.
What if I blank on a design question mid-interview?+
You have a backup. If you freeze on how to structure Time Based Key-Value Store or Insert Delete GetRandom, StealthCoder runs invisibly during the assessment and shows you a working approach in seconds. You stay calm, you don't tank the round. That's the whole point.