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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Clear topic filter- Multiple ChoiceHard
[Nginx] proxy_cache_path Proxy cache
qanginxnginxqa - Multiple ChoiceHard
[Nginx] proxy_cache_key Proxy cache
qanginxnginxqa - Multiple ChoiceHard
[Nginx] proxy_cache_valid Proxy cache
qanginxnginxqa - Multiple ChoiceHard
[Nginx] Bypass Proxy cache
qanginxnginxqa - Multiple ChoiceHard
[Nginx] Purging Proxy cache
qanginxnginxqa - Multiple ChoiceBeginner
[Nginx] Prefix URL-based routing
qanginxnginxqa - Multiple ChoiceBeginner
[Nginx] Exact URL-based routing
qanginxnginxqa - Multiple ChoiceBeginner
[Nginx] Regex URL-based routing
qanginxnginxqa - Multiple ChoiceBeginner
[Nginx] Priority URL-based routing
qanginxnginxqa - Multiple ChoiceBeginner
[Nginx] Alias URL-based routing
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] limit_req_zone Prevent abuse
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] limit_req Prevent abuse
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Burst Prevent abuse
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Dry-run Prevent abuse
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Key Prevent abuse
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] proxy_pass Forward requests to backends
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Load balancing Forward requests to backends
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Buffering Forward requests to backends
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Headers Forward requests to backends
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Upstream Forward requests to backends
qanginxnginxqa - Multiple ChoiceHard
[Nginx] ssl_certificate HTTPS termination
qanginxnginxqa - Multiple ChoiceHard
[Nginx] ssl_certificate_key HTTPS termination
qanginxnginxqa - Multiple ChoiceHard
[Nginx] HTTP/2 HTTPS termination
qanginxnginxqa - Multiple ChoiceHard
[Nginx] Let's Encrypt HTTPS termination
qanginxnginxqa - Multiple ChoiceHard
[Nginx] Modern config HTTPS termination
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Upgrade header Proxy WS connections
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Connection header Proxy WS connections
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Timeout Proxy WS connections
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Same location Proxy WS connections
qanginxnginxqa - Multiple ChoiceIntermediate
[Nginx] Buffering off Proxy WS connections
qanginxnginxqa
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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.