Multiplayer Functionality and Networking Basics Questions
Conceptual understanding of multiplayer game architecture (client-server, peer-to-peer). Knowledge of latency, synchronization challenges, and how state is managed in multiplayer games. Familiarity with concepts like interest management and authoritative servers. Awareness of common multiplayer pitfalls (desync, cheating vulnerability).
HardSystem Design
106 practiced
Design a global multiplayer architecture for a cross-platform MMORPG that supports instanced real-time combat and asynchronous social features. Describe region topology, stateless frontends vs stateful game servers, matchmaking, session persistence, cross-region chat and social features, leaderboards with eventual consistency, latency-based routing, and DDoS mitigation strategies.
HardSystem Design
75 practiced
Design a lockless distributed tick scheduler for authoritative game instances across multiple regions. Explain how to coordinate tick boundaries without global locks, handle clock skew and drift, perform leader election if needed, and guarantee bounded latency for cross-region events despite failures. Include fallback behaviors on partial network partitions.
EasyTechnical
86 practiced
Technical coding (C#): Implement a simple dead-reckoning prediction function. Given Vector3 lastPosition, Vector3 velocity, float lastTimestampSeconds, and float targetTimestampSeconds, return the predicted position at targetTimestampSeconds. Clamp prediction so that if targetTimestampSeconds < lastTimestampSeconds you return lastPosition. Keep the function concise and defensively handle large extrapolation deltas by clamping to a maxExtrapolationSeconds parameter.
HardTechnical
105 practiced
Technical/design: Create a network-level anti-cheat strategy for a competitive FPS that includes telemetry collection, anomaly-detection models, challenge-response validation, server-side enforcement, and privacy considerations. Detail what signals to collect, how to design sampling and window sizes for analysis, and how to scale detection across many servers.
HardTechnical
91 practiced
Leadership/case study: You lead networking decisions for a next-gen title constrained by mobile bandwidth but requiring competitive real-time gameplay. Given five candidate investments (increase tick-rate, implement rollback netcode, richer telemetry, end-to-end encryption, global cross-play), prioritize them and justify your order by trade-offs in player experience, engineering effort, ops cost, and measurable metrics you'd track to validate success.
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