Free CS0-003 practice exams are the fastest way to gauge your readiness for the CompTIA Cybersecurity Analyst (CySA+) certification. CS0-003 is a scenario-heavy blue-team exam that expects you to triage SIEM alerts, prioritise vulnerabilities using CVSS, EPSS, and the CISA KEV catalog, coordinate incident response against NIST 800-61, and communicate findings clearly to both technical and executive audiences. Working through realistic questions in advance shows you exactly which analyst workflows you already own and which ones still need reinforcement.
What CS0-003 covers
The CS0-003 exam tests four official domains. Security Operations (33 percent) covers system and network architecture concepts, log ingestion and analysis, endpoint and network telemetry, MITRE ATT&CK, threat hunting, malware analysis, and everyday SOC workflows. Vulnerability Management (30 percent) covers scanner types and outputs, CVSS scoring, EPSS and the CISA KEV catalog, SSVC prioritisation, remediation options, exception handling, and validation. Incident Response and Management (20 percent) covers the NIST 800-61 lifecycle, IOC and IOA analysis, containment strategies, digital forensics fundamentals, and root-cause analysis. Reporting and Communication (17 percent) covers vulnerability reports, incident reports, stakeholder management, and metrics such as MTTD and MTTR. The exam runs 165 minutes with up to 85 questions, mixes multiple choice with performance-based questions, and needs a scaled score of 750 out of 900 to pass.
What's in these practice exams
These free CompTIA CS0-003 practice questions cover all four domains at the official weightings:
- Security operations (SIEM triage, log correlation, MITRE ATT&CK mapping, threat hunting, EDR alerts, packet analysis, malware IOCs)
- Vulnerability management (Nessus and Qualys outputs, CVSS v3.1 scoring, EPSS, CISA KEV, SSVC, false-positive validation, compensating controls)
- Incident response (NIST 800-61 phases, containment vs eradication, chain of custody, disk and memory forensics, lessons learned)
- Reporting and communication (vulnerability report structure, executive summaries, stakeholder mapping, metrics like MTTD, MTTR, and dwell time)
The first set of 20 questions is completely free with no signup. The remaining 24 sets unlock premium features like weak-area analytics, per-domain progress tracking, and timed mode that mirrors the real 165-minute, 85-question exam.
How to use these effectively
Start with the free set to baseline your accuracy across the four domains, then focus your next few sessions on whichever domain scored lowest. Because Security Operations and Vulnerability Management together make up nearly two thirds of the exam, expect the majority of questions per set to sit there. Read every explanation, not just the ones you got wrong, because CS0-003 rewards recognising the least-bad answer in an ambiguous situation and the rationales spell out why one option is more defensible than another. Once you are consistently above 80 percent, switch to mixed sets and practise under a rough timer, because the real exam alternates between domains inside a single sitting and burns time on any performance-based question you have not rehearsed the workflow for.