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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428 challenges matching your filters
Clear topic filter- Multiple ChoiceIntermediate
SELinux
cybersecintermediate - Multiple ChoiceIntermediate
SetGID Bit
cybersecintermediate - Multiple ChoiceIntermediate
Sticky Bit
cybersecintermediate - Multiple ChoiceBeginner
Linux: Service Manager
cybersecbeginner - Multiple ChoiceHard
TCP Wrappers
cybersechard - Multiple ChoiceIntermediate
ulimit
cybersecintermediate - Multiple ChoiceIntermediate
Linux: umask
cybersecintermediate - Multiple ChoiceIntermediate
Adware
cybersecintermediate - Multiple ChoiceIntermediate
Advanced Persistent Threat
cybersecintermediate - Multiple ChoiceBeginner
Malware: Botnet
cybersecbeginner - Multiple ChoiceIntermediate
Command and Control
cybersecintermediate - Multiple ChoiceIntermediate
Dropper
cybersecintermediate - Multiple ChoiceIntermediate
Fileless Malware
cybersecintermediate - Multiple ChoiceIntermediate
Keylogger
cybersecintermediate - Multiple ChoiceIntermediate
Polymorphic Malware
cybersecintermediate - Multiple ChoiceIntermediate
Rootkit
cybersecintermediate - Multiple ChoiceBeginner
Scareware
cybersecbeginner - Multiple ChoiceIntermediate
Spyware
cybersecintermediate - Multiple ChoiceBeginner
Malware: Trojan
cybersecbeginner - Multiple ChoiceBeginner
Malware: Virus
cybersecbeginner - Multiple ChoiceBeginner
Malware: Worm
cybersecbeginner - Multiple ChoiceHard
AS-REP Roasting
cybersecmcqhard - Multiple ChoiceIntermediate
Defense: SameSite
cybersecmcqintermediate - Multiple ChoiceBeginner
Defense: HSTS
cybersecmcqbeginner - Multiple ChoiceIntermediate
JWT: alg=none / key confusion
cybersecmcqintermediate - Multiple ChoiceHard
Kerberoasting
cybersecmcqhard - Multiple ChoiceHard
TOCTOU Race
cybersecmcqhard - Multiple ChoiceHard
SAML: XML Signature Wrapping
cybersecmcqhard - Multiple ChoiceIntermediate
SQLi: Time-based blind
cybersecmcqintermediate - Multiple ChoiceIntermediate
SSRF: Cloud Metadata
cybersecmcqintermediate - Multiple ChoiceHard
TLS: Forward Secrecy
cybersecmcqhard - Multiple ChoiceBeginner
ARP: Function
cybersecbeginner - Multiple ChoiceBeginner
DHCP: Function
cybersecbeginner - Multiple ChoiceBeginner
DNS: Function
cybersecbeginner - Multiple ChoiceIntermediate
DNS Poisoning
cybersecintermediate - Multiple ChoiceHard
DNS Tunneling
cybersechard - Multiple ChoiceBeginner
Firewall: Basic Function
cybersecbeginner - Multiple ChoiceBeginner
Ping Command
cybersecbeginner - Multiple ChoiceBeginner
Private IP Range
cybersecbeginner - Multiple ChoiceBeginner
IPv4 vs IPv6
cybersecbeginner - Multiple ChoiceIntermediate
Load Balancer
cybersecintermediate - Multiple ChoiceBeginner
Localhost IP
cybersecbeginner - Multiple ChoiceBeginner
MAC Address
cybersecbeginner - Multiple ChoiceIntermediate
MITM Attack
cybersecintermediate - Multiple ChoiceBeginner
NAT: Purpose
cybersecbeginner - Multiple ChoiceBeginner
OSI: Layer 2
cybersecbeginner - Multiple ChoiceBeginner
OSI: Layer 3
cybersecbeginner - Multiple ChoiceBeginner
OSI: Layer 4
cybersecbeginner - Multiple ChoiceBeginner
OSI: Layer 7
cybersecbeginner - Multiple ChoiceBeginner
OSI Model: Layers
cybersecbeginner - Multiple ChoiceBeginner
DNS Port
cybersecbeginner - Multiple ChoiceBeginner
FTP Ports
cybersecbeginner - Multiple ChoiceBeginner
Default Port: HTTP
cybersecbeginner - Multiple ChoiceBeginner
Default Port: HTTPS
cybersecbeginner - Multiple ChoiceBeginner
RDP Port
cybersecbeginner - Multiple ChoiceBeginner
SMTP Port
cybersecbeginner - Multiple ChoiceBeginner
Default Port: SSH
cybersecbeginner - Multiple ChoiceIntermediate
Forward Proxy
cybersecintermediate - Multiple ChoiceIntermediate
Reverse Proxy
cybersecintermediate - Multiple ChoiceBeginner
Router: Function
cybersecbeginner
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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.