Devtron coding interview
questions, leaked.
2 problems reported across recent Devtron interviews. Top patterns: string, greedy, heap priority queue. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Devtron's interview is tight: two problems, one easy and one hard, both anchored in string manipulation. You're looking at 'Reverse Words in a String III' as your warm-up and 'Strong Password Checker' as the real test. The easy one is a two-pointer drill. The hard one stacks greedy logic with heap reasoning on top of string constraints. This isn't a marathon of problems. It's a precision strike. If you freeze on 'Strong Password Checker' during the live assessment, StealthCoder surfaces a working approach invisibly, letting you move past it.
Top problems at Devtron
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Strong Password Checker | HARD | 100.0 | 15% | String · Greedy · Heap (Priority Queue) |
| 02 | Reverse Words in a String III | EASY | 100.0 | 84% | Two Pointers · String |
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 Devtron OA. The proctor cannot see it. Screen share cannot detect it. Made by a working FAANG engineer who treats the OA the way companies treat hiring: as a game with rules you should know.
Get StealthCoder- string2 · 100%
- greedy1 · 50%
- heap priority queue1 · 50%
- two pointers1 · 50%
String problems dominate Devtron's signal, appearing in both questions. The easy problem is straightforward two-pointer iteration. The hard problem is where the interview breathes: it layers greedy decision-making with priority queue optimization to find the minimum edits for a valid password. That combination of greedy plus heap thinking isn't obvious on first read, and it's where most candidates stall. Two-pointer is your confidence builder. String-greedy-heap is your hedge. If you haven't seen the 'Strong Password Checker' pattern before, StealthCoder runs invisibly during screen share and delivers a working solution the moment you hit the wall, so you can code it cleanly and move on.
Companies with similar patterns
If you prepped for Devtron, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Devtron.
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 by a working FAANG engineer who treats the OA the way companies treat hiring: as a game with rules you should know. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Devtron interview FAQ
Should I focus on the easy problem or jump straight to the hard one?+
Start with 'Reverse Words in a String III'. It's a two-pointer warm-up that builds confidence and takes five minutes. Then shift to 'Strong Password Checker', which fuses greedy, heap, and string logic. The hard problem is where Devtron actually evaluates you. Spend 70 percent of prep time there.
Is greedy enough for Devtron's hard problem?+
No. 'Strong Password Checker' requires greedy decisions combined with heap-based prioritization. You can't just greedily replace characters. You need to think about which edits yield the most efficiency. That stack of techniques is what Devtron is probing for. Drill both together.
How much time should I spend on string manipulation before the interview?+
String problems are 100 percent of Devtron's signal. Both problems touch strings. Master two-pointer string iteration and character constraint handling. Spend at least three practice sessions on string reversal, replacement, and validation patterns.
Will I see heap problems anywhere else in Devtron's interview?+
Only in 'Strong Password Checker'. The heap isn't a standalone topic here. It's bundled with greedy logic as part of the hard problem's solution. If you can solve that one problem, you've covered the heap requirement.
What if I can't solve the hard problem in time during the assessment?+
That's why you prep the easy problem until it's automatic. You'll bank time and confidence. If you still hit a wall on 'Strong Password Checker', you'll have breathing room to think or reach for a backup. StealthCoder is your invisible net if the greedy-heap combination doesn't click in the moment.