QBurst coding interview
questions, leaked.
3 problems reported across recent QBurst interviews. Top patterns: array, dynamic programming, two pointers. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
QBurst's assessment hits you with three problems across the full difficulty range, and they're not spread out. All three lean heavily on array manipulation, with dynamic programming showing up twice. You're looking at classic patterns: container-sizing logic, stock-trading timing, and interval optimization. The easy one lulls you. The hard one (Burst Balloons) is a DP minefield that trips up candidates who haven't drilled recursive subproblems. If you freeze on the hard problem during the live assessment, StealthCoder runs invisibly and surfaces a working solution in seconds, no proctor visibility.
Top problems at QBurst
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Container With Most Water | MEDIUM | 100.0 | 58% | Array · Two Pointers · Greedy |
| 02 | Best Time to Buy and Sell Stock | EASY | 100.0 | 55% | Array · Dynamic Programming |
| 03 | Burst Balloons | HARD | 100.0 | 61% | Array · 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 QBurst OA. The proctor cannot see it. Screen share cannot detect it. Built by a senior engineer who knows the OA is theater. This is the script.
Get StealthCoder- array3 · 100%
- dynamic programming2 · 67%
- two pointers1 · 33%
- greedy1 · 33%
Array shows up in all three problems, which means your foundation matters. Two-pointers and greedy appear in the medium problem (Container With Most Water), so get comfortable with that single-pass optimization logic early. The real threat is dynamic programming, which appears in the easy and hard problems. Most candidates skip DP prep because it feels abstract, but here it's unavoidable. Best Time to Buy and Sell Stock is a gentle DP intro; Burst Balloons is a wall. Start with the easy and medium to build confidence and pattern recognition. The hard problem is where StealthCoder becomes your safety net if the recurrence relation doesn't click under time pressure.
Companies with similar patterns
If you prepped for QBurst, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass QBurst.
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 a senior engineer who knows the OA is theater. This is the script. Works on HackerRank, CodeSignal, CoderPad, and Karat.
QBurst interview FAQ
Should I solve all three problems the same way I'd approach them in practice?+
No. Treat the easy and medium as confidence builders. Drill those until the patterns are muscle memory. The hard problem (Burst Balloons) is complex enough that if you blank during the live assessment, you need a backup plan. That's where understanding the DP structure matters most.
Is dynamic programming really necessary for an assessment with this spread?+
Yes. DP appears twice and the hard problem is pure DP. You can't skip it. Start with Best Time to Buy and Sell Stock to learn the state-transition mindset, then move to Burst Balloons. Two days of focused DP drilling will cover both.
How much time should I spend on array and two-pointer problems?+
All three problems use arrays. Container With Most Water is your two-pointer drill. Spend one focused session on that pattern: two pointers, moving inward, tracking the maximum area. It's a foundation you'll use for other problems.
What if I run out of time and only prepare for one or two problems?+
Master the easy and medium first. Best Time to Buy and Sell Stock is quick and teaches DP fundamentals. Container With Most Water solidifies two-pointer logic. Even partial understanding of Burst Balloons is better than none, but those two will get you further.
Is the medium problem significantly harder than the easy one?+
The medium problem requires thinking beyond brute force and optimizing with two pointers. The easy one is a standard DP transition. The medium is the real speed test. If you can solve Container With Most Water in under ten minutes, you're in good shape for the hard problem.