Skip to content

Tracks

AI-assisted engineering Working with AI Agents System design Core systems Data and AI systems Coding Coding problems Code review On-call SQL

Practice

Paths Concept guides

FreeAd-supported

The plan adds AI feedback and removes ads.

Concept guides/Concurrency/The event loop (cooperative scheduling)

CodingConcurrency

The event loop (cooperative scheduling)

Hard3 min read

Questions it teaches

Event loop priority task schedulerMedium25 min Single-server queue simulationHard35 min Deterministic task schedulerHard40 min Blocking call starves event loopHard35 min Event loop output orderHard40 min

Related

Concurrency Designing data structures Backend internals Reviewing AI code Correctness review

Builds on: Designing data structures

Queues, deques & ring buffers3 min Database deduplication3 min

Leads to: Backend internals

Encoding and schema evolution4 min MAC addresses4 min

Related: Reviewing AI code

Catching AI mistakes3 min Understanding code & docs with AI3 min

Related: Correctness review

Spotting correctness bugs3 min Structured logging3 min

© 2026 Prep Room·From California·AI can make mistakes.

About Legal Contact Cookies Your privacy choices

Home Review Tracks Paths