Roblox
Game-loop performance, memory budgets, and network topology for many concurrent clients.
- Active questions
- 3
- Rounds covered
- 2
- Last reviewed
- Aug 25, 2026
Reported questions
The full collection. Each entry shows how many independent reports it has and when it was last seen in a live loop.
- CodingHardSingle report · 2 reports
Hold 60fps with 10,000 objects on canvas
A canvas editor drops frames as the document grows. Describe your measurement approach, then the culling, batching, and layering changes you would make in priority order.
Last seen Aug 5, 2026 - CodingMediumCorroborated · 5 reports
Cache with expiry and bounded memory
Implement a cache with a maximum entry count and a per-entry TTL, with O(1) get and put. Then explain what changes if reads outnumber writes a thousand to one.
Last seen Aug 16, 2026Study: Core coding patterns → - System designHardCorroborated · 5 reports
Match riders to drivers in real time
Design the matching loop for a city-scale dispatch system. Cover spatial indexing, how often you recompute, and what you do when the optimal match is 90 seconds away.
Last seen Aug 25, 2026Study: System design →
Interviewed at Roblox recently?
Corroborating a question takes reports from people who did not interview together. Adding yours is what keeps this collection from drifting out of date.