peak6 coding interview
questions, leaked.
2 problems reported across recent peak6 interviews. Top patterns: array, simulation, enumeration. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Peak6 is running you through two medium-difficulty problems, both rooted in array manipulation paired with either simulation or enumeration logic. You're looking at pattern-matching and state-tracking under time pressure. The good news: the sample is small and focused, so you can nail the exact patterns they care about. The catch: both problems demand clean implementation and careful iteration. If you freeze mid-OA on the simulation or enumeration piece, StealthCoder runs invisibly and surfaces a working approach in seconds, keeping you moving.
Top problems at peak6
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Maximum Profit of Operating a Centennial Wheel | MEDIUM | 100.0 | 44% | Array · Simulation |
| 02 | Coordinate With Maximum Network Quality | MEDIUM | 100.0 | 38% | Array · Enumeration |
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 peak6 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- array2 · 100%
- simulation1 · 50%
- enumeration1 · 50%
Array work dominates here, but it's not raw data-structure puzzles. Both problems layer a second skill on top: one requires you to simulate a centennial wheel and track profit across states, the other asks you to enumerate coordinate combinations and measure network quality. This tells you Peak6 values simulation and enumeration chops alongside solid array handling. Start by drilling the centennial wheel problem to understand how to model state changes, then move to the coordinate enumeration pattern. Array fundamentals alone won't cut it; you need to think in terms of state transitions and brute-force search. When you're live and hit a wall on the enumeration logic, StealthCoder is your safety net, solving it in real time without the proctor seeing a thing.
Companies with similar patterns
If you prepped for peak6, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass peak6.
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.
peak6 interview FAQ
Should I study simulation problems before enumeration ones for Peak6?+
Yes. The centennial wheel problem appears in their top list and requires you to model state changes over time, which is the harder conceptual skill. Enumeration (coordinate grid search) is more mechanical. Nail simulation first, then handle enumeration as a follow-up pattern.
Are there hard problems in Peak6's interview?+
No. Both problems in the data are medium difficulty. That doesn't mean they're simple, just that the ceiling is capped. You're not facing curveball hard problems, so preparation is high-leverage. Focus on bulletproof implementations of the two patterns they showed.
Do I need to know multiple data structures for Peak6?+
Both problems center on arrays. You don't need to juggle trees, graphs, or heaps. That said, inside those array problems, you're doing simulation and enumeration, so your real skill is algorithmic thinking, not data-structure variety.
How much time should I spend on each problem type?+
Given the data, spend roughly 60 percent of your prep on simulation and state-modeling (centennial wheel pattern), and 40 percent on enumeration and search (coordinate grid pattern). This mirrors the technical depth Peak6 appears to care about.
What's the main thing that could go wrong on Peak6's assessment?+
Miscounting state transitions or missing edge cases in the enumeration loop. These are implementation-heavy problems, not conceptual puzzles. Off-by-one errors and incomplete iteration logic are the killers. Practice until your loops are airtight.