Roblox Coding Interview Questions
These are the 15 Roblox coding interview questions AceOffer has reconstructed from candidate reports, sorted by how often each was reported. Rate Limiter (Sliding Window) leads at 29×. Every question shows when it was last reported; the catalog refreshes monthly.
Key facts
- •15 distinct coding questions indexed
- •100 candidate reports across those questions
- •Most reported: Rate Limiter (Sliding Window) — 29× (last seen July 2026)
- •Refreshed monthly · last updated August 2026
Which Roblox rounds ask coding questions?
Roblox draws coding questions from the rounds below. Counts are distinct questions, not times asked.
Most reported: Rate Limiter (Sliding Window) — 29×
Most reported: Factory Profit Maximization / Assembly Line Optimization (OA) — 5×
Which Roblox coding questions get asked most?
Sorted by candidate-report frequency. Click any question for the full breakdown.
| Question | Round | Reported | Last seen |
|---|---|---|---|
| Rate Limiter (Sliding Window)Free The round is two graded parts, each with a given signature and its own test cases. Reported follow-ups extend it further (arbitrary… | Coding | 29× | July 2026 |
| Most Frequent Call Stack / Call Path Analysis The round comes in three graded parts, submitted one at a time. Reports are consistent that the clock is tight, so finish… | Coding | 22× | August 2026 |
| Topological Sort / Dependency Ordering The round is one graded problem with error handling, and reports agree the specification is deliberately ambiguous - you learn the exact… | Coding | 9× | June 2026 |
| Function Call Stack Parsing / isFuncComplete / Balanced Brackets Implement a function isFuncComplete(s: str) -> bool that determines whether a given input string represents a syntactically complete function call. The core… | Coding | 7× | July 2026 |
| Sliding Window with Target Number Given an array of numbers nums, a fixed window size k, and a target number, solve two related sub-problems: (1) Find all… | Coding | 5× | May 2026 |
| Factory Profit Maximization / Assembly Line Optimization (OA) A Roblox OA mini-game (25 minutes) in which you manage multiple factory production lines and must maximize total profit. You are given… | OA | 5× | August 2026 |
| Tree Node with Maximum Depth / Binary Tree Traversal A multi-part binary tree problem observed in two variants: Variant A (Q2/Q3 series): Q2: Given a binary tree, return the node with… | Coding | 4× | November 2025 |
| Autocomplete / Prefix Search with Frequency and Timestamp Given three arrays — queries (strings), timestamps (integers, one per query), and prefixes (strings) — for each prefix find all matching queries… | Coding | 4× | December 2025 |
| Vehicle / Car Building Simulation Game (OA) One of several mini-game tasks in Roblox's OA assessment. Within a fixed time limit (approximately 25 minutes), the candidate must build as… | OA | 4× | August 2026 |
| Cursor-Based Pagination You are given a collection of user log arrays where each user's logs are pre-sorted in ascending order. The problem has two… | Coding | 3× | January 2026 |
| Grid Gravity and Removal / Candy Crush You are given an m×n grid where each cell contains a digit 0–9. The problem has two phases: Phase 1 – Match… | Coding | 3× | December 2025 |
| Scheduling / Game List Adjacency (No Consecutive Identical) Given a list of games (or tasks/events), rearrange the list such that no two identical items appear in adjacent positions. The solution… | Coding | 2× | January 2026 |
| Piano Keys Coding Problem Implement an interactive 6-key piano interface (keys: C, D, E, F, G, A) using only vanilla HTML, CSS, and JavaScript — no… | Coding | 1× | August 2026 |
| Design a Model for Poor-Quality Chat and Video Content Design a machine learning system to detect and handle poor-quality or policy-violating content across multiple modalities — including chat (text) and video.… | Coding | 1× | April 2025 |
| Music Player Shuffle vs Random Mode Detection An offline music player has a playlist of songs and two playback modes: • Random mode: At each step, picks the next… | Coding | 1× | April 2025 |
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