- A
Disk storage
Why wrong: Disk is persistent storage, less volatile than memory.
- B
Swap space
Why wrong: Swap is on disk, less volatile than RAM.
- C
RAM
Why wrong: RAM is volatile but less than CPU registers.
- D
CPU registers and cache
Correct. Registers are the most volatile.
Question 676 of 1,000
CS0-003 Incident Response and Management Practice Question
This CS0-003 practice question tests your understanding of incident response and management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which of the following is the MOST volatile data according to the order of volatility?
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
✓
CPU registers and cache
CPU registers and cache are the most volatile because they store data only while the system is powered on and actively executing instructions. Unlike RAM, which retains data for a short time after power loss, registers and cache lose their contents almost instantly when power is removed, making them the highest priority in the order of volatility (OOV) for forensic acquisition.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Disk storage
Why it's wrong here
Disk is persistent storage, less volatile than memory.
- ✗
Swap space
Why it's wrong here
Swap is on disk, less volatile than RAM.
- ✗
RAM
Why it's wrong here
RAM is volatile but less than CPU registers.
- ✓
CPU registers and cache
Why this is correct
Correct. Registers are the most volatile.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that RAM is the most volatile data source, but the correct answer is CPU registers and cache because they are cleared the instant the CPU halts or loses power.
Detailed technical explanation
How to think about this question
The order of volatility is defined by RFC 3227, which prioritizes CPU registers and cache as the most volatile, followed by routing tables, ARP cache, process tables, kernel statistics, main memory (RAM), temporary file systems, swap space, and finally disk storage. In practice, capturing CPU registers requires a hardware debugger or a kernel crash dump utility (e.g., kdump on Linux), as they are not directly accessible via standard forensic tools. A real-world scenario is a live memory acquisition during an active ransomware attack, where the attacker's encryption keys may reside briefly in CPU cache before being written to RAM.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A SOC analyst notices unusual lateral movement in the network at 2 AM. The IR playbook dictates: identify and contain (isolate the affected machine), then eradicate (remove the malware), then recover (restore from backup), then document. Skipping containment before eradication risks the attacker regaining access. Questions like this test the sequence and rationale of incident response phases.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this CS0-003 question test?
Incident Response and Management — This question tests Incident Response and Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: CPU registers and cache — CPU registers and cache are the most volatile because they store data only while the system is powered on and actively executing instructions. Unlike RAM, which retains data for a short time after power loss, registers and cache lose their contents almost instantly when power is removed, making them the highest priority in the order of volatility (OOV) for forensic acquisition.
What should I do if I get this CS0-003 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This CS0-003 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 CS0-003 exam.
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