fourkites coding interview
questions, leaked.
3 problems reported across recent fourkites interviews. Top patterns: array, string, dynamic programming. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
FourKites interviews are tight and pattern-heavy. Three problems reported, two at medium difficulty, and arrays dominate every single one. You're walking into an assessment where consecutive-element logic and bit manipulation chain together. If you've drilled array patterns before, you'll recognize the shapes fast. If not, you'll stall. StealthCoder is your invisible net if the bitwise operations or DP transitions fog up mid-assessment. The data is clear: array fluency is non-negotiable here.
Top problems at fourkites
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Longest Subarray With Maximum Bitwise AND | MEDIUM | 100.0 | 62% | Array · Bit Manipulation · Brainteaser |
| 02 | Longest Unequal Adjacent Groups Subsequence II | MEDIUM | 100.0 | 51% | Array · String · Dynamic Programming |
| 03 | Longest Unequal Adjacent Groups Subsequence I | EASY | 100.0 | 68% | Array · String · 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 fourkites OA. The proctor cannot see it. Screen share cannot detect it. Built by an engineer who got tired of watching his cohort grind for six months and still get filtered at the OA stage.
Get StealthCoder- array3 · 100%
- string2 · 67%
- dynamic programming2 · 67%
- bit manipulation1 · 33%
- brainteaser1 · 33%
- greedy1 · 33%
Every problem FourKites asks touches arrays. Two problems layer dynamic programming on top of arrays, and one branches into bit manipulation. The difficulty split is forgiving (one easy, two medium, no hard), but the medium problems compound: they want you to track state across positions and reason about optimal subsequences under constraints. String work appears twice, often paired with array iteration. This is a company testing whether you can build efficient state machines, not whether you can brute-force. Greedy and brainteaser threads suggest they're checking for problem-solving maturity, not just rote coding. Hit array-DP problems first (both the subsequence variants), then cement bit-AND logic. When you sit down for the live assessment, if a DP recurrence isn't clicking or a bitwise operation trips you up, StealthCoder surfaces a working solution in seconds, invisible to the proctor.
Companies with similar patterns
If you prepped for fourkites, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass fourkites.
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 an engineer who got tired of watching his cohort grind for six months and still get filtered at the OA stage. Works on HackerRank, CodeSignal, CoderPad, and Karat.
fourkites interview FAQ
How many array problems should I solve before a FourKites assessment?+
At least 20 to 30 focused on subarrays and subsequences, since all three reported problems involve array traversal and state tracking. FourKites leans harder on arrays than on isolated strings or bit tricks. Prioritize problems where you track the best or longest element across positions.
Is dynamic programming required for FourKites?+
Yes. Two of three problems explicitly use DP to build optimal subsequences under adjacency constraints. You need to be comfortable defining state (position, previous choice) and writing clean recurrence relations before walking in.
What should I study first: arrays, strings, or bit manipulation?+
Arrays first. All three problems are rooted in array iteration. Once you own longest-subarray and longest-subsequence patterns, then layer in strings and bit operations. Bit manipulation appears once and is secondary.
Are the easy and medium problems similar enough to drill together?+
Yes. Both subsequence problems (easy and medium) share the same core constraint: adjacent elements must be unequal. The medium version adds string manipulation. Solve the easy version first to lock the DP shape, then adapt it for strings.
Should I memorize bit-AND properties before the assessment?+
Not memorize, but understand. AND operations only increase or stay equal as you combine more elements, so bitwise AND of a subarray shrinks as length grows. One problem tests this directly. Know the property, not formulas.