CompTIA CySA+ CS0-004 Exam Practice Questions, practice question pack
COMPTIA · CS0-004

CompTIA CySA+ CS0-004 Exam Practice Questions

82 questionsInstant PDF downloadUpdated September 2026

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Three of the 82 questions in this pack

Question 1

Which of the following is the most important reason why tactics, techniques, and procedures (TTP) are beneficial to a defensive strategy?

  1. TTP provides useful insights on the hash values and internet protocol addresses attributed to an attacker.
  2. TTP provides useful insights on an attacker's indicators of compromise.
  3. TTP provides useful insights on the tools used by an attacker.
  4. TTP provides useful insights on the strategy and behavior of an attacker.
Show answer and explanation

Correct answer: D. TTP provides useful insights on the strategy and behavior of an attacker.

behavior of an attacker. Tactics, techniques and procedures describe how an adversary operates rather than what artefacts they happened to leave behind. Hashes and IP addresses change the moment an attacker rebuilds their infrastructure, but the strategy and behaviour behind an intrusion is costly to change and tends to persist across campaigns. Defending against behaviour therefore keeps working after the indicators have rotated.

Why the other options are wrong

  • A. Hash values and IP addresses are the most disposable indicators an attacker has; they are trivially changed.
  • B. Indicators of compromise are the artefacts left by an attack, not the behaviour that produced it.
  • C. Tooling can be swapped for an equivalent utility without changing how the adversary operates.

Question 2

Which of the following is the best reason to heavily segment business-critical assets from within the network?

  1. Legacy systems
  2. Degraded functionality
  3. Asset obfuscation
  4. Proprietary server
Show answer and explanation

Correct answer: A. Legacy systems

Legacy systems are the reason segmentation has to be heavy rather than nominal. They frequently cannot be patched, cannot run modern endpoint controls and cannot be replaced without breaking a business process, so the only control left is to restrict what can reach them. Segmentation compensates for protections the asset itself cannot carry.

Why the other options are wrong

  • B. Degraded functionality is a consequence of segmenting, not a reason to do it.
  • C. Asset obfuscation hides an asset's identity and is a side effect rather than the driver.
  • D. A proprietary server describes what the asset is, not why it needs isolating.

Question 3

A cybersecurity analyst receives an unstructured text document that contains advanced persistent threat (APT)-related indicators of compromise (IoCs). The analyst needs to extract the IPv4 addresses.

Which of the following is the best tool to accomplish this task?

  1. CyberChef
  2. Wireshark
  3. Zeek
  4. Open Cyber Threat Intelligence (OpenCTI)
Show answer and explanation

Correct answer: A. CyberChef

CyberChef is built for exactly this: transforming and extracting data from unstructured text through chained operations, including a recipe that pulls IPv4 addresses out of arbitrary content. The document is text rather than captured traffic, so a parsing and extraction tool is the right instrument.

Why the other options are wrong

  • B. Wireshark analyses packet captures and cannot process a text document.
  • C. Zeek generates logs from live or captured network traffic, not from prose.
  • D. OpenCTI stores and relates threat intelligence once it is structured; it is not an extraction tool.

See all 10 free questions Get the full pack, US$39

82 practice questions for CompTIA CySA+ (CS0-004), with full explanations.

Every question comes with the correct answer, a clear explanation, and a note on why each other option is wrong, and both full performance-based simulations are worked through step by step.

  • 82 questions, MCQs and performance-based simulations, mapped to the CS0-004 objectives
  • Both simulations fully worked through, every tab, every dropdown, and the reasoning step by step
  • A questions-only PDF for timed practice runs
  • Instant delivery by email the moment you check out
  • Free monthly updates for as long as the exam is live, and this bank grows as more of the new exam surfaces
  • Pass or your money back

The CySA+ voucher costs US$439. This pack is US$39, paid once, and refunded if you fail.

Try 10 questions free before you buy.

Last updated September 2026 · 82 questions

What makes the CySA+ CS0-004 hard

CS0-004 launched on 23 June 2026. It is brand new, so there is very little material in circulation for it: most of what you will find online is still written for the old CS0-003. These are practice questions built on the current exam blueprint, with a written explanation for every one.

The performance-based simulations are where people lose the exam, and they are the hardest thing to prepare for because you cannot practise them from a list of facts. Both of the ones in this pack are worked through in full: which server breaches the 14-day remediation standard and why the others do not, which host is beaconing to the DDoS target and which process owns the connection. Not just the answer: the reasoning that gets you there.

V4 is not a relabelled V3. Every domain was reweighted, Security Operations went up, Vulnerability Management and Incident Response both moved, and the exam now leans harder into AI-related analysis, cloud and operational technology. Practising on a CS0-003 bank means practising the wrong balance.

About the exam

The CompTIA CySA+ is CompTIA’s intermediate-level cybersecurity certification, sitting between Security+ and SecurityX. It validates the ability to detect, analyse and respond to threats through continuous security monitoring, covering security operations, vulnerability management, incident response and reporting. DoD 8140 approved across multiple analyst and responder work roles including SOC analyst, threat intelligence analyst and vulnerability assessment analyst.

Exam domains (V4)

  • Security operations: 34%
  • Vulnerability management: 26%
  • Incident response and management: 24%
  • Reporting and communication: 16%

Exam version V4, series code CS0-004, launched 23 June 2026. Up to 85 questions in 165 minutes, pass mark 750 on a scale of 100 to 900, US$439 per voucher. English only at launch, with French, Japanese, Spanish and Portuguese to follow. Around four years in a SOC analyst or vulnerability analyst role recommended. Pearson VUE testing centres or online proctored, valid for three years.

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Questions before you buy

What do I get when I buy the CompTIA CySA+ CS0-004 pack?

82 practice questions as a PDF, each with the correct answer, a full explanation and a note on why the other options are wrong, plus a separate questions-only PDF for timed practice.

How quickly do I receive it?

Straight away. The full PDF and a questions-only copy are emailed to you the moment your payment goes through, and the same links are on your order page.

Is there a free sample?

Yes. Ten questions from this pack, with answers and explanations, are free on this page and as a PDF, so you can judge the quality before you pay.

Are updates included?

Yes. The pack is updated every month for as long as the exam is live, and updates are free for everyone who has bought it.

What if I fail the exam?

We refund the pack. Sit the exam 7 to 30 days after buying, then send your official score report within 7 days of the exam date, as set out in the refund policy.

Can I share it with colleagues?

Each purchase is licensed to one person. For a team, school or training organisation, email support@certstash.com for a licence that fits.

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