How often are these problems asked?
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Axon interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Problem database last updated: June 20, 2025
A
Axon Coding Interview Questions
7 problems · 2 Easy, 5 Medium, 0 Hard · Ranked #191 of 458
Difficulty breakdown
2 Easy
29% · avg 23%
5 Medium
71% · avg 59%
0 Hard
0% · avg 18%
Top topics
string
57.1%2x
hash-table
42.9%1.9x
array
42.9%
math
42.9%3.4x
design
28.6%4.9x
binary-search
14.3%1.6x
Interview profile
Based on 7 reported problems, Axon interviews are easier than average - only 0% Hard compared to 18% across all companies. The majority (71%) of questions are Medium difficulty, which is typical for companies that want to see solid fundamentals without excessive trick questions.
Compared to the industry average, Axon puts unusual emphasis on design (28.6% of problems, 4.9x the industry average), math (42.9% of problems, 3.4x the industry average), string (57.1% of problems, 2x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are string (57.1%), hash-table (42.9%), array (42.9%), math (42.9%). Problems below are sorted by frequency, the ones at the top are asked most often.
All 7 problems
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Time Based Key-Value Store Design a time-based key-value data structure that can store multiple values for the same key at different time stamps and retrieve the key's value at a certain... | Medium | Very Likely | hash-tablestringbinary-search | Solve |
Insert Delete GetRandom O(1) Implement the RandomizedSet class: | Medium | Very Likely | arrayhash-tablemath | Solve |
Valid Palindrome A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forwa... | Easy | Likely | two-pointersstring | Solve |
Number of Islands Given an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the number of islands. | Medium | Likely | arraydepth-first-searchbreadth-first-search | Solve |
Edit Distance Given two strings word1 and word2, return the minimum number of operations required to convert word1 to word2. | Medium | Likely | stringdynamic-programming | Solve |
Roman to Integer Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. | Easy | Likely | hash-tablemathstring | Solve |
K Closest Points to Origin Given an array of points where points[i] = [xi, yi] represents a point on the X-Y plane and an integer k, return the k closest points to the origin (0, 0). | Medium | Likely | arraymathdivide-and-conquer | Solve |
Time Based Key-Value Store
SolveDesign a time-based key-value data structure that can store multiple values for the same key at different time stamps and retrieve the key's value at a certain...
MediumVery Likely
hash-tablestringbinary-search
Insert Delete GetRandom O(1)
SolveImplement the RandomizedSet class:
MediumVery Likely
arrayhash-tablemath
Valid Palindrome
SolveA phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forwa...
EasyLikely
two-pointersstring
Number of Islands
SolveGiven an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the number of islands.
MediumLikely
arraydepth-first-searchbreadth-first-search
Edit Distance
SolveGiven two strings word1 and word2, return the minimum number of operations required to convert word1 to word2.
MediumLikely
stringdynamic-programming
Roman to Integer
SolveRoman numerals are represented by seven different symbols: I, V, X, L, C, D and M.
EasyLikely
hash-tablemathstring
K Closest Points to Origin
SolveGiven an array of points where points[i] = [xi, yi] represents a point on the X-Y plane and an integer k, return the k closest points to the origin (0, 0).
MediumLikely
arraymathdivide-and-conquer
Preparing for your Axon coding interview
Axon interviews focus heavily on string, hash-table, array 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. Axon 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.
Looking for more companies? Browse all 458 companies in our directory, or sharpen your fundamentals with our free data structure visualizers and AI-powered DSA tutor.
Frequently Asked Questions
What coding problems does Axon ask in interviews?add
Axon has been reported to ask 7 distinct coding problems. The most common topics are string, hash-table, array. 2 are Easy difficulty, 5 are Medium, and 0 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
How hard are Axon coding interviews?add
Based on 7 reported problems, Axon interviews are easier than average - only 0% Hard compared to 18% across all companies. 71% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
How should I prepare for a Axon coding interview?add
Start with the highest-frequency problems listed on this page. Focus on the core topics: string, hash-table, array. 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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