AI 시스템 설계 면접 키트

Reference latency and unit tables, assumptions register, QPS, storage, bandwidth, cache, server and cost formulas, worked example, sensitivity, traceability

Problem framing, metrics, data, features, baselines, training, offline and A/B evaluation, serving, monitoring, rollout

Recommender funnel: two-tower retrieval and ANN, pre-ranking and ranking, feature freshness, training, exploration, A/B tests, feedback loops and bias

Real-time payment fraud scoring: latency budget, streaming features, rules plus ML, review queues, label delay, selection bias, model monitoring

Enterprise RAG search design: connectors, document and chunk ACL filtering, permission sync, hybrid retrieval, RRF, reranking, citation verification, tenancy

Chat assistant app layer: resumable SSE streaming, conversation store, context budget and summaries, uploads, tools, moderation, rate limits, residency

AI coding assistant design: IDE and CLI clients, repo indexing, context assembly, agent loop, microVM sandbox, MCP and Agent Skills, approvals, security

Customer support AI agent design: channels, intent routing, policy retrieval, refunds with limits and approvals, human handoff, metrics, safety, audit

Real-time voice agent design: SIP and WebRTC ingress, streaming ASR, turn detection, barge-in, LLM with tools, streaming TTS, latency budget, consent, failover

LLM gateway and router design: unified API, provider adapters, token quotas, routing and fallback, caching, PII redaction, guardrail hooks, metering

Gateway, router, continuous batching, paged KV cache, GPU memory and throughput math, TTFT/TPOT SLOs, autoscaling, quantization, HNSW/IVF, cost per token

Agent run platform design: durable step journal, resume, MCP tool broker with Tasks, A2A calls, human approvals, tenant budgets, evaluation hooks

Code execution sandbox for agents: microVM vs gVisor vs containers, egress proxy, credential broker, quotas, snapshot restore, warm pools, abuse detection