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CompTIA CySA+ CS0-003 Practice Test

503 questions with instant explanations, domain breakdown, and wrong-answer analysis. Built for the real exam.

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Full explanations included
Domain score breakdown
Real exam: 165 min
Pass mark: 750%

Sample questions with explanations

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Q1Security Operationshard
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A SIEM correlation rule for impossible travel is creating noise from VPN users. Which refinements should improve fidelity? (Choose two.)

ADisable all identity alerts
Require a second signal such as new device, failed MFA, or mailbox rule creationCorrect
Add trusted VPN egress ranges as named/known locationsCorrect
DTreat every VPN login as malicious

Option B is correct because requiring a second signal—such as a new device, failed MFA, or mailbox rule creation—adds an additional layer of verification that helps confirm the user's identity and intent. This reduces false positives from VPN users whose IP addresses may change r…Read full explanation

Q2Security Operationsmedium
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A SOC is onboarding endpoint logs into a SIEM. Which fields are most important for process-chain investigations? (Choose three.)

Parent process name and command lineCorrect
BMonitor refresh rate
User and host identifiersCorrect
Child process command lineCorrect

Parent process name and command line are critical for process-chain investigations because they establish the lineage of an execution event. In a SIEM, these fields allow analysts to trace how a process was spawned, identifying whether it originated from a legitimate application …Read full explanation

Q3Security Operationshard
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A threat hunter suspects data exfiltration over HTTPS from a database server. Which data sources are most useful? (Choose two.)

Database audit logs showing queried objects and accountsCorrect
BPrinter toner status
CBuilding temperature logs
NetFlow or proxy logs showing destination, volume, and timingCorrect

Database audit logs record which objects (tables, columns) were queried and by which accounts, directly revealing unauthorized access or unusual data retrieval patterns that could indicate exfiltration. NetFlow or proxy logs capture destination IP addresses, data volumes, and tim…Read full explanation

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