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All System Design AI Solutions Architecture & AI Engineering Interview Questions (61)

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Part 2 of 5

What Happens Between a Click and an Answer?

Follow Riya's tap on 'Reserve' from her phone to the library's database and back: IP, DNS, HTTP, TCP/UDP, CDNs, load balancers, proxies, API styles and live updates, each introduced by the problem that forces it. Guide 2 of 5.

Created 2026-09-15 · Updated 2026-10-15 · System Design

gRPC in Depth: Calling Another Service Without Pretending the Network Is Reliable

Contracts, Protocol Buffers, HTTP/2 streams, deadlines, status codes, retries, load balancing, keepalive, and browsers: how gRPC works and where the sharp edges are.

Created 2026-09-26 · Updated 2026-10-15 · System Design

API Monitoring: Proving the Library Can Still Reserve a Book

A health check that passes while nobody can reserve a book: how to monitor API outcomes with synthetic journeys and real-request telemetry, keep test traffic safe, turn failures into actionable alerts, and defend the cost, privacy and recovery decisions in an interview.

Created 2026-10-17 · Updated 2026-10-17 · System Design