Challenge Library

Coding Challenges

5,893 curated questions across every arena — browse by topic, then jump into a live 3-minute battle to put them to the test.

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Multiple ChoiceIntermediate
[System Design] Round robin Distribute traffic
qasys-designsys-designqa
Multiple ChoiceIntermediate
[System Design] Least connections Distribute traffic
qasys-designsys-designqa
Multiple ChoiceIntermediate
[System Design] L4 vs L7 Distribute traffic
qasys-designsys-designqa
Multiple ChoiceIntermediate
[System Design] Health check Distribute traffic
qasys-designsys-designqa
Multiple ChoiceIntermediate
[System Design] Sticky sessions Distribute traffic
qasys-designsys-designqa

Practice now, dominate the arena

Every challenge here is drawn from the live Code Royale pool. Review a question, then head to the arena to answer under pressure against a real opponent — 3-minute matches, Elo ranking, and badge tiers on the line.

Coding Challenges

[System Design] Round robin Distribute traffic

[System Design] Least connections Distribute traffic

[System Design] L4 vs L7 Distribute traffic

[System Design] Health check Distribute traffic

[System Design] Sticky sessions Distribute traffic

Practice now, dominate the arena