System designLast reported Jul 2026
Design a Like/Unlike Service
Design a scalable service that lets users add or remove one like and serves trustworthy aggregate counts under hot-item traffic.
Open practiceRoblox interview practice
Roblox interview questions and coding practice. Start with verified evidence.
Practice from 41 Roblox-tagged public coding problems, organized only by the stage, topic, difficulty, and recency metadata FastPrep can verify. The broader public catalog also includes 1 system-design exercise.
- Catalog
- 42 public practice assets (41 coding)
- Start here
- Use the stage named in your invitation
- Evidence
- OA · Phone · Onsite metadata, shown in context
OA practice path
Online Assessment
Build a timed implementation rhythm from prompt to edge cases. Problems are ranked by repeated public catalog sightings.
19 Roblox-tagged Online Assessment problems available.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
RORoblox | Count House Segments After DestructionArrayHash Table | Medium | 2 public reportsLast reported Aug 2026 | Practice |
RORoblox | Event ID Check Completion TimesArrayQueue | Medium | 2 public reportsLast reported Aug 2026 | Practice |
RORoblox | Cyclic Shift PairsStringHash Table | Medium | 2 public reportsLast reported Aug 2026 | Practice |
RORoblox | Longest Contiguous House SegmentArrayHash Table | Medium | 1 public reportLast reported Aug 2026 | Practice |
RORoblox | Sorted Extended Matrix DiagonalsMatrixString | Medium | 1 public reportLast reported Aug 2026 | Practice |
RORoblox | Leftmost Memory Block AllocatorArraySimulation | Medium | 1 public reportLast reported Aug 2026 | Practice |
RORoblox | Dynamic Pair Sum QueriesArrayHash Table | Medium | 1 public reportLast reported Aug 2026 | Practice |
RORoblox | Robot Navigation Around LasersArrayMatrix | Medium | 1 public reportLast reported Aug 2026 | Practice |
RORoblox | Break a PalindromeStringMath | Hard | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Minimum Height Difference Between Distant PeaksArraySorting | Medium | 1 public reportLast reported Aug 2025 | Practice |
RORoblox | Phone Battery Discharge SchedulingSimulationArray | Medium | 1 public reportLast reported Aug 2025 | Practice |
RORoblox | Find Number of Valid PairsArrayMath | Easy | 1 public reportLast reported Sep 2024 | Practice |
RORoblox | Schedule MeetingIntervalsSorting | Medium | 1 public reportLast reported Sep 2024 | Practice |
RORoblox | Find Longest Diagonal SegmentMatrixSimulation | Medium | 1 public reportLast reported Aug 2024 | Practice |
RORoblox | Make Towers Strictly Increasing or DecreasingArrayGreedy | Medium | 1 public reportLast reported Aug 2024 | Practice |
RORoblox | Find Max Number of PairsArrayMath | Easy | 1 public reportLast reported Aug 2024 | Practice |
RORoblox | Suffix PairsStringTrie | Medium | 1 public reportLast reported Mar 2024 | Practice |
RORoblox | Count PairsArrayBit Manipulation | Easy | 1 public reportLast reported Feb 2024 | Practice |
RORoblox | Largest Value of Usage in MinutesStringParsing | Easy | 1 public reportLast reported Feb 2024 | Practice |
Phone practice path
Phone Screen
Practice solving while explaining assumptions, tradeoffs, and complexity. Problems are ranked by repeated public catalog sightings.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
RORoblox | Most Frequent Call Stack Per ThreadHash TableSorting | Medium | 3 public reportsLast reported Jul 2026 | Practice |
RORoblox | Candy Crush Grid Matching and GravityArraySimulation | Medium | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Closest Binary Search Tree Value — Base PracticeTree | Easy | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Design Search Autocomplete SystemTrieHeap | Hard | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Grid Pathfinding with Obstacles (DFS)GraphDepth-First Search | Medium | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Maximum Number of Balls in a BoxHash TableMath | Easy | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Meeting Rooms IIArraySorting | Medium | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Most Frequent Call Path From Function Trace LogsStackHash Table | Medium | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Single-Threaded CPUHeapSorting | Medium | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Topological Sort with Secondary OrderingGraphTopological Sort | Medium | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Merge IntervalsArraySorting | Medium | 1 public reportLast reported May 2026 | Practice |
RORoblox | Implement a Rate LimiterDesignHash Table | Medium | 1 public reportLast reported May 2026 | Practice |
RORoblox | Rate Limit by Multiple Request FieldsDesignHash Table | Medium | 1 public reportLast reported May 2026 | Practice |
RORoblox | Rate Limiter Sliding Window With Per-Entity LimitsSliding WindowHash Table | Medium | 1 public reportLast reported May 2026 | Practice |
RORoblox | Remove Prefix StringsStringSorting | Medium | 1 public reportLast reported Sep 2025 | Practice |
RORoblox | Flatten Nested ArrayArrayRecursion | Medium | 1 public reportLast reported Jun 2025 | Practice |
Onsite practice path
Onsite
Practice complete solutions and defend the choices behind them. Problems are ranked by repeated public catalog sightings.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
RORoblox | Most Frequent Call Path in Interleaved LogsArrayString | Medium | 1 public reportLast reported Aug 2026 | Practice |
RORoblox | Maximize Distance to Closest Person — Return the SeatArrayTwo Pointers | Easy | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Sliding Window: Target Containment and Most-Repeated WindowSliding WindowArray | Medium | 1 public reportLast reported Jun 2026 | Practice |
RORoblox | Cursor-Based Pagination Over Sorted LogsArraySorting | Medium | 1 public reportLast reported May 2026 | Practice |
RORoblox | Implement TrieStringTrie | Medium | 1 public reportLast reported May 2026 | Practice |
RORoblox | Highest-Earning Experience TrackerHeapHash Table | Medium | 1 public reportLast reported Mar 2026 | Practice |
01 · Stage workflow
Practice the stage you actually have next.
Use the mixed-stage Roblox inventory to separate timed assessment rehearsal from conversational and onsite-style technical practice. Your invitation and recruiter guidance remain the source of truth.
- 01
Online Assessment
Use the timing and format in your invitation as the source of truth. In practice, work without interruptions, budget time to read constraints, and reserve a final review window for boundary cases.
- State the input, output, and complexity target before coding.
- Implement one complete solution inside a fixed timebox.
- Run small, duplicate, empty, and boundary cases before finishing.
- 02
Phone Screen
Treat the problem as a conversation. Clarify the contract, describe the approach before implementation, and keep narrating meaningful decisions while you code and test.
- Ask clarifying questions instead of silently filling gaps.
- Explain the data structure and expected complexity.
- Walk through at least one example and one edge case aloud.
- 03
Onsite
Use the catalog's onsite labels as practice context, not as a promise about a specific loop. Focus on collaborative problem solving: compare approaches, implement cleanly, and explain how the solution behaves at scale.
- Compare a straightforward approach with the optimized one.
- Keep the implementation readable while discussing tradeoffs.
- Test the result, then name follow-up improvements explicitly.
02 · Broader technical practice
Practice beyond standalone coding questions.
These public Roblox-tagged exercises cover additional technical formats. They are included only when a verified catalog record and a crawlable practice page both exist.
03 · Evidence boundary
What “Roblox interview questions” means here.
It means practicing transferable implementation, testing, and technical reasoning with public catalog assets FastPrep tags to Roblox. It does not mean FastPrep has access to the company's assessments or any private interview bank.
Repeated public sightings and last-reported dates can help you prioritize practice, but they cannot predict the questions, format, or platform in a specific interview.
- Only Roblox-tagged FastPrep catalog problems appear above.
- Stage labels and report dates remain visible as context.
- No official, private, leaked, or proprietary questions are claimed.
04 · Plain answers
Roblox interview practice questions, answered plainly.
This page owns technical-practice intent for Roblox. Hiring activity, timelines, and market signals remain on the separate hiring-insights page.
01Does this page include Roblox design or project practice?
Yes, when the public catalog supports it. This page currently links 1 system-design exercise, 0 low-level-design exercises, and 0 project-coding exercises tagged to Roblox. Empty formats are omitted rather than padded with generic recommendations.
02Is FastPrep affiliated with Roblox?
No. FastPrep is an independent interview-preparation product and is not affiliated with Roblox. The page uses FastPrep's public practice catalog and does not claim official, private, leaked, or proprietary employer questions.
03How are Roblox problems assigned to interview stages?
Stage labels come from FastPrep's public problem metadata. A problem can carry more than one reported stage, and hiring processes can change by role, level, location, and date. Treat the labels as preparation context, not a guarantee.
04Which Roblox interview stage should I practice first?
Start with the stage named in your invitation or recruiter message. If no stage is known, use the largest available set to build general problem-solving fluency, then rehearse explanation and testing separately.
05Does this page predict the Roblox interview process?
No. Public catalog counts, stage tags, and last-reported dates can help prioritize practice, but they cannot predict a specific interview's questions, sequence, timing, or platform.
Your next stage, made concrete
Pick a problem. Solve it end to end.
Start with the stage named in your invitation, then use public evidence as context—not as a promise of what you will be asked.
Open the practice set