CS0-003 Reporting and Communication Practice Question
During a security incident, which THREE elements are critical to include in the incident report for a compliance review?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Impact assessment
Timeline, impact assessment, and root cause are essential for understanding the incident and meeting compliance requirements. Lessons learned are important for improvement but not always mandatory for compliance; remediation timeline may be separate.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Lessons learned
Why it's wrong here
Although valuable for continuous improvement, it is a post-incident review that typically occurs after reporting and is not a mandatory component of an initial incident report. Regulatory frameworks like PCI DSS or GDPR do not specifically require a lessons-learned section; instead, they focus on detection, response, and notification. Thus, while important for maturity, it is not one of the three critical elements during the incident itself.
- ✓
Impact assessment
Why this is correct
This quantifies the degradation to confidentiality, integrity, and availability, including data exfiltration volume, systems compromised, financial losses, and regulatory exposure. It is critical because it drives the severity classification, escalations, and short-term mitigation priorities such as isolating affected hosts or activating business continuity plans. Impact assessment also provides stakeholders with the information needed to decide on legal reporting and customer notifications.
- ✗
Remediation timeline
Why it's wrong here
A remediation plan is often developed separately after the incident is contained, describing steps to eliminate the root cause and restore normal operations. It is not one of the three critical elements in the immediate incident report because the report focuses on what happened, why, and what damage occurred—not the full future work plan. Additionally, the remediation timeline may change as new information emerges, making it less suitable for formal incident documentation at the moment.
- ✓
Timeline of events
Why this is correct
A chronological sequence of all observed activities, alerts, and actions taken during the incident. It is critical because regulators and legal teams require an accurate log to reconstruct the attack path, determine scope, and verify that the organization met notification deadlines. Without a precise timeline, incident responders cannot correlate telemetry from different sources or demonstrate due diligence in court.
- ✓
Root cause analysis
Why this is correct
This digs deeper than the immediate event to identify the underlying vulnerability or control failure that allowed the incident to occur. It is critical because corrective actions must address the actual defect—whether it is a misconfigured firewall, unpatched software, or a phishing campaign—rather than just reverting to a clean state. Root cause analysis informs whether the same attack vector remains viable and guides security investments.
Go deeper
Related to this question
Learn chapter
Patch and Remediation Workflows
Key term
Impact
Impact is the measure of the potential damage or harm that a risk event could cause to an organization's assets, operations, or reputation.
Key term
Incident
An incident is a security event that violates an organization's policies or threatens its data, systems, or operations, requiring a structured response.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CS0-004 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CS0-004 exam.