Hunt threats and fix what matters. Pass CompTIA CySA+.
Revision notes on security operations, vulnerability management, incident response and reporting — built to the V4 (CS0-004) objectives, including AI in security operations — plus log-and-output practice that explains every option and full-length timed mocks.
The CS0-004 exam at a glance
Official exam details from the CompTIA exam guide — the numbers our mock exams mirror.
Who should take the CS0-004?
CS0-004 is a professional-level certification for experienced practitioners. It tests design judgment across complex, multi-service scenarios — not recall.
You lead design decisions
You're the person who chooses between architectures. CS0-004 validates that judgment against CompTIA's own bar.
You have years of hands-on work
Professional-level exams reward breadth and battle scars. If you've operated production systems on CompTIA, this is the credential that says so.
You hold associate certs
The step up from associate level: longer scenarios, more trade-offs, and the most senior individual credential CompTIA offers.
What’s on the CS0-004 exam
Every lesson, question, and mock is weighted to match these official domains.
Security Operations
System and network architecture in security operations, indicators of malicious activity, investigation tools, threat intelligence and hunting, process improvement and automation, and AI in the SOC. Official weighting 34%.
Vulnerability Management
Choosing and planning vulnerability scans, reading the output of assessment tools, prioritizing and mitigating findings, and the control, risk and application-security concepts around them. Official weighting 26%.
Incident Response and Management
Attack methodology frameworks, the incident response process from preparation to post-incident, and hands-on response techniques: triage, evidence, containment, remediation and root cause. Official weighting 24%.
Reporting and Communication
Reporting and communicating vulnerability management and incident response: scan reports, scorecards, action plans, inhibitors to remediation, stakeholders, post-incident reports and SOC metrics. Official weighting 16%.
How you’ll prepare for the CS0-004
Three surfaces, one loop: read, drill, rehearse — repeat until your readiness score says book it.
Read the lessons
Work domain by domain through 15 plain-English revision lessons covering every task statement in the CS0-004 exam guide — key terms, "what's tested" callouts, and takeaways.
Drill every topic
Work through 599 exam-realistic questions in learn mode to study, or quiz mode to test yourself. Every option explains why it’s right or why it’s a trap, with one click back to the lesson.
Rehearse the exam
Sit 3 full-length timed mocks weighted to the official domains and scored on the real CS0-004 scale — so your mock result predicts your real one.
Exam in a few days? The CS0-004 cheat sheet puts every lesson’s key takeaways and what’s tested on one page.
Start reading CS0-004 lessons — no account needed
Open any of these in a new tab and judge the quality yourself. If the lessons don’t earn your time, don’t sign up.
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- Every revision lesson
- 10 practice questions a day
- Cheat sheets & flashcards
- No account needed to start
- All revision lessons
- Full question bank
- All full-length mock exams
- Scaled-score readiness
- Weak-area study plan
- Unlimited practice
CS0-004 questions, answered
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