Druva coding interview
questions, leaked.
4 problems reported across recent Druva interviews. Top patterns: array, greedy, sorting. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Druva's coding assessment is small but dense. Four problems across easy and medium difficulty, and the pattern is unmistakable: arrays are everywhere, greedy choices matter, and binary search shows up when you least expect it. You're looking at a focused test on core data structures and algorithmic thinking, not a marathon. The assessment rewards speed and pattern recognition. If you hit a wall on the live OA, StealthCoder runs invisibly in the background and surfaces a working solution in seconds, freeing you to move on.
Top problems at Druva
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Maximize Sum Of Array After K Negations | EASY | 100.0 | 52% | Array · Greedy · Sorting |
| 02 | Reorganize String | MEDIUM | 67.0 | 56% | Hash Table · String · Greedy |
| 03 | Search in Rotated Sorted Array | MEDIUM | 67.0 | 43% | Array · Binary Search |
| 04 | Longest Increasing Subsequence | MEDIUM | 67.0 | 58% | Array · Binary Search · 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 Druva OA. The proctor cannot see it. Screen share cannot detect it. Made by a working Amazon engineer who got tired of watching qualified friends bomb OAs they'd solve cold in an IDE.
Get StealthCoder- array3 · 75%
- greedy2 · 50%
- sorting2 · 50%
- binary search2 · 50%
- hash table1 · 25%
- string1 · 25%
- heap priority queue1 · 25%
- counting1 · 25%
- dynamic programming1 · 25%
Arrays dominate three of the four problems, so your first week should be array manipulation and the greedy approaches that solve it. Maximize Sum Of Array After K Negations is the warm-up, but don't sleep on it. Reorganize String is the curveball: it layers hash table counting, sorting, and heap logic into one medium problem. Binary search appears in two problems (Search in Rotated Sorted Array and Longest Increasing Subsequence), and that's where candidates typically lose time if they haven't drilled the pattern. Longest Increasing Subsequence adds dynamic programming into the mix, so expect to think in terms of state and recurrence. The difficulty is backloaded to medium, which means pacing matters. If you're solid on greedy and sorting before the OA, StealthCoder becomes your hedge for the DP or binary search edge case you didn't have time to memorize.
Companies with similar patterns
If you prepped for Druva, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Druva.
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 Amazon engineer who got tired of watching qualified friends bomb OAs they'd solve cold in an IDE. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Druva interview FAQ
How many array problems should I solve before the Druva assessment?+
At least six to eight, focusing on greedy and sorting patterns. Three of Druva's four problems are array-based, and two explicitly use greedy logic. Start with Maximize Sum Of Array After K Negations, then move to harder array-greedy hybrids to build speed.
Is binary search really necessary for Druva?+
Yes. It appears in two of four problems here (rotated sorted array and LIS). If you're weak on the pattern, you'll lose time under pressure. Drill at least three binary search variants before the OA. It's non-negotiable.
What should I study first for a Druva interview?+
Array manipulation with greedy logic. One problem is pure greedy sorting, another layers greedy on top of hash tables and heaps. Get comfortable flipping signs, sorting, and deciding when to flip. Greedy intuition is half the battle here.
Do I need to know dynamic programming for Druva?+
One problem requires it: Longest Increasing Subsequence. It's medium difficulty and pairs binary search with DP. If DP isn't your strong suit, focus on the greedy and sorting problems first, then learn the LIS pattern the night before.
How long should I spend on Reorganize String?+
It's the hardest problem on the assessment and uses six different topics. Expect it to take 20 to 30 minutes under OA conditions. It combines hash table counting, sorting, and heap logic. Practice it once or twice, then trust that pattern recognition will carry you through on test day.