athenahealth coding interview
questions, leaked.
11 problems reported across recent athenahealth interviews. Top patterns: array, hash table, sorting. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
athenahealth's coding assessment is heavy on arrays. 8 of 11 problems in the dataset touch array manipulation, and the difficulty split is deceptive: 4 easy problems look like warmups, but they're often gated on hash-table and two-pointer instincts you won't have time to second-guess mid-OA. The medium tier (6 problems) chains arrays with sorting, dynamic programming, and string work. You're looking at Group Anagrams, Merge Intervals, and Unique Paths II as the real filters. If you blank on any pattern live, StealthCoder runs invisibly during the assessment and surfaces a working solution in seconds.
Top problems at athenahealth
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | The Number of Rich Customers | EASY | 100.0 | 77% | Database |
| 02 | Group Anagrams | MEDIUM | 79.6 | 71% | Array · Hash Table · String |
| 03 | Merge Intervals | MEDIUM | 73.2 | 49% | Array · Sorting |
| 04 | Best Time to Buy and Sell Stock | EASY | 73.2 | 55% | Array · Dynamic Programming |
| 05 | Unique Paths II | MEDIUM | 64.2 | 43% | Array · Dynamic Programming · Matrix |
| 06 | Merge Sorted Array | EASY | 64.2 | 53% | Array · Two Pointers · Sorting |
| 07 | Two Sum | EASY | 64.2 | 56% | Array · Hash Table |
| 08 | First Missing Positive | HARD | 64.2 | 41% | Array · Hash Table |
| 09 | Longest Substring Without Repeating Characters | MEDIUM | 64.2 | 37% | Hash Table · String · Sliding Window |
| 10 | Longest Palindromic Substring | MEDIUM | 64.2 | 36% | Two Pointers · String · Dynamic Programming |
| 11 | Exclusive Time of Functions | MEDIUM | 64.2 | 65% | Array · 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 athenahealth 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- array8 · 73%
- hash table4 · 36%
- sorting3 · 27%
- dynamic programming3 · 27%
- string3 · 27%
- two pointers2 · 18%
- matrix1 · 9%
- database1 · 9%
- sliding window1 · 9%
- stack1 · 9%
Arrays dominate, but they're not isolated. Sorting appears in 3 problems and almost always pairs with arrays (Merge Intervals, Merge Sorted Array). Hash-tables show up in 4 problems and are your backdoor to problems like Two Sum and First Missing Positive, the hard outlier. Three problems involve dynamic programming: Best Time to Buy and Sell Stock is a classic DP disguised as greedy, while Unique Paths II and Longest Palindromic Substring require state tables. The 1 hard problem (First Missing Positive) demands hash-table or in-place array tricks most candidates fumble. Drill arrays and sorting first, then hash-tables for collision handling. By the time you hit a DP problem live, StealthCoder is your safety net if the recurrence relation doesn't click.
Companies with similar patterns
If you prepped for athenahealth, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass athenahealth.
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.
athenahealth interview FAQ
Should I prioritize arrays or hash-tables for athenahealth?+
Arrays first. 8 of 11 problems involve arrays. Hash-tables appear in 4 problems, but 3 of those pair with arrays (Two Sum, Group Anagrams, First Missing Positive). Master array iteration, merging, and state tracking before drilling hash-table collisions.
How much dynamic programming do I need to know?+
3 problems use DP (Best Time to Buy and Sell Stock, Unique Paths II, Longest Palindromic Substring). Two are medium-difficulty. Spend time on memoization and 2D state tables, but don't panic if DP isn't your strength. It's not the majority.
Is sorting important for this company's assessment?+
Yes. Sorting touches 3 problems and is essential for Merge Intervals and Group Anagrams. Practice sorting plus two-pointer merges. Merge Sorted Array combines both in a deceptive easy problem.
What's the hardest problem I'll face?+
First Missing Positive is the only hard problem in the dataset. It requires in-place array manipulation or hash-table knowledge. Most candidates either overshoot space complexity or miss the constraint. This is where you either solve it or pass and move on quickly.
Should I study string problems for athenahealth?+
3 problems involve strings, all paired with other topics (Group Anagrams with sorting, Longest Substring with hash-tables and sliding-window, Longest Palindromic Substring with DP). Don't isolate string study. Learn them as part of array and hash-table workflows.