CAS-004 Security Operations Practice Question
A security analyst is investigating a potential data exfiltration incident. The analyst needs to preserve evidence for legal proceedings. Which two actions must the analyst take to maintain the chain of custody? (Select TWO).
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
✓
Document every person who accesses the evidence and the time of access
Documenting who handled evidence and when, and using forensic imaging with write-blockers ensures integrity and admissibility.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Encrypt the evidence with a personal key
Why it's wrong here
Encryption may be used but not a chain of custody requirement.
- ✗
Share the evidence with all team members for analysis
Why it's wrong here
Uncontrolled sharing breaks chain of custody.
- ✓
Document every person who accesses the evidence and the time of access
Why this is correct
Chain of custody requires a record of evidence handling.
- ✗
Run antivirus scans on the evidence to ensure it is safe
Why it's wrong here
Antivirus scans may modify evidence; not part of chain of custody.
- ✓
Create a forensic image of the hard drive using a write-blocker
Why this is correct
Forensic imaging preserves the original evidence without alteration.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 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 CAS-005 exam.