roblox | Software Engineer | Interview Experience
Interview Date: Not specified
Result: Not specified
Difficulty: Not specified
Interview Process
I had a phone screen interview with Roblox where I was asked about rate limiting. The interviewer explained the problem of maintaining a given threshold of requests to a service over a time window and asked me to come up with a solution.
To approach this, I discussed different methods of rate limiting, such as the Token Bucket and Leaky Bucket algorithms. I proposed using a sliding window technique, maintaining a queue of timestamps to track requests. The interviewer seemed pleased with the approach and inquired about handling scenarios where the service is under heavy load.
I suggested implementing an exponential backoff for retrying requests that exceed the rate limit. We also discussed edge cases, including scenarios where requests briefly burst above the limit but remain within acceptable limits overall.
Overall, it was a good interview with technical depth in problem-solving and design.
Technical Questions
- Rate Limiter (Design, Rate Limiting)
Tips & Insights
Focus on understanding different algorithms for rate limiting and be prepared to discuss their trade-offs. Emphasize problem-solving and design considerations during the interview.