CompTIA SecurityX

CompTIA SecurityX CAS-005 Practice Test: Free Questions and Answers

CompTIA retired CASP+ (CAS-004) on 17 June 2025 and replaced it with Official CAS-005  Security X  exam code CAS-005, the flagship of its Xpert Series. That rename caused damage to people's study plans, because a lot of the courseware, video series and question banks still sitting at the top of search results were built for CAS-004 objectives. CAS-005 added post-quantum cryptography, AI-related threat modelling, SASE and compliance as code, and rebalanced the domain weights. If your practice material does not say CAS-005 on it, you are rehearsing for an exam that no longer exists.

What SecurityX actually tests

SecurityX is not a knowledge recall exam. Roughly three quarters of the CAS-005 objectives are written as scenario-based tasks, which means the question rarely asks what something is. It gives you a business constraint, a failure condition or a competing set of requirements, then asks for the BEST, FIRST, NEXT or MOST appropriate action. Several options will be technically correct. Only one fits the constraint in the stem.

The four domains and their weights on the current objectives:

• Security Engineering, 31%. The largest domain and where most of the new CAS-005 content sits. Secure DevOps and CI/CD pipeline controls, IAM and federation design, endpoint and server hardening, cryptographic selection including post-quantum algorithms, and secure protocol choices.

• Security Architecture, 27%. Resilient and recoverable design, cloud and hybrid architecture, zero trust patterns, segmentation, secure access architectures including SASE, and data protection design.

• Security Operations, 22%. Threat hunting and threat intelligence, monitoring and detection engineering, incident response, forensics, vulnerability management and automation of operational workflows.

• Governance, Risk, and Compliance, 20%. Governance structures, risk management and quantification, third-party and supply chain risk, privacy and data governance, and mapping controls to regulatory frameworks.

Engineering and Architecture together make up 58% of the exam. That tells you where to spend your review time, but none of the four is small enough to skip. GRC at 20% is a fifth of the paper and is the domain technical candidates most often under-prepare.

Who sits this exam

CompTIA recommends ten years of general IT experience with at least five of those hands-on in security. That recommendation is not enforced at registration, but the question style assumes you have sat in architecture review meetings and on incident bridges. The  audience is senior security engineers, security architects, SOC leads and principal engineers who want to stay technical rather than move into the management track that CISSP is built around.

There is also a steady stream of defence and federal candidates. SecurityX carries DoD 8140 approval at multiple work role levels, which makes it a contract requirement for a lot of people rather than a career choice. If that is why you are here, you are in the group most likely to be attempting the exam earlier in your experience curve than CompTIA intends, and the practice tests matter more for you than for anyone else.

Format details that change how you should practise

The exam runs to a maximum of 90 questions in 165 minutes and includes both multiple-choice and performance-based items. Two format facts change your preparation:

It is pass or fail with no scaled score. CompTIA publishes no numerical result and no cut score for SecurityX. You will not get a domain breakdown you can act on, which is exactly why you need diagnostic data before you sit it rather than after.

The PBQs sit at the front and eat your clock. Performance-based items usually appear early. Candidates who work them in order and refuse to move on frequently find themselves with 40 multiple-choice items and 30 minutes left. Flag the long simulations, clear the multiple-choice questions where your pace is predictable, then come back with the time you have banked.

Multi-select items are common and are not flagged generously. Read the instruction line on every question. Choosing two answers on a select-three item scores as wrong, not partially correct.

Using this free CAS-005 practice test properly

Take a mixed 90-question set cold before you study anything. Not to score well, but to find out which of the four domains collapses under time pressure. Most people discover the gap is not where they assumed.

Then work by domain rather than by volume. If Security Engineering is where you lose questions, isolated Engineering sets will surface the specific decision pattern costing you marks, whether that is cryptographic selection, pipeline controls or federation design.

Review every question you answered correctly by guessing. On a scenario exam this matters more than reviewing your wrong answers, because a lucky guess on a BEST-response question means you have not internalised the ranking logic, and the next version of that scenario will catch you.

When you read an explanation, argue with the distractors. Ask why the other three options fail under the specific constraint in the stem. That habit is what the exam actually measures, and it is the single highest-return thing you can do with a question bank.

Sit at least one full-length timed set in one sitting before exam day. Fatigue at the 130-minute mark is a genuine failure mode on a 165-minute scenario exam Want more exam practice? Take our computer skills practice online test.

Where CAS-005 candidates lose marks

Answering as an engineer when the stem is asking as an architect. A question that hands you a budget ceiling, a regulatory obligation and a legacy dependency is not asking for the strongest technical control. It is asking for the control that survives all three constraints.

Using CAS-004 material. Post-quantum cryptography, AI-driven threat surfaces, compliance as code and SASE are CAS-005 additions. Candidates who studied from a CASP+ course walk in with a genuine blind spot on questions they have never seen the vocabulary for.

Skimming the qualifier. BEST, FIRST, NEXT and MOST are doing  work in these questions. FIRST in an incident scenario and BEST in the same scenario frequently have different correct answers.

Treating GRC as the easy domain. Technical candidates rush it, and risk quantification, third-party assessment and privacy obligations are more precise than they look.

Over-engineering cloud answers. The exam favours the design that meets the stated requirement. Options that add unnecessary layers are written specifically to attract candidates who think more control is always better.

Study approach that fits this exam

Read the official CAS-005 objectives document as a checklist and mark every bullet you could not explain to a colleague for two minutes. That document is the exam blueprint, and the sub-bullets are more granular than most courses cover.

Build or borrow an environment. The PBQs reward people who have configured identity federation, written pipeline security gates and read raw SIEM output rather than watched someone else do it.

For cryptography, know selection criteria rather than internals. SecurityX asks which algorithm or protocol fits a requirement, not how the maths works. Know where post-quantum candidates apply and what problem they exist to solve.

Practise explaining a control to a non-technical stakeholder. A recurring question shape asks you to justify a security decision in business terms, and candidates who only think in technical terms pick the wrong justification.

If you hold Security+ or CySA+, use them as scaffolding, not as coverage. SecurityX asks you to design and defend the systems those exams asked you to operate.

Next step

Open a full 90-question mixed set, run it on a 165-minute clock, and note which domain costs you the most time rather than the most marks. Those two are often different, and the time cost is the one that fails people on exam day. Work that domain in isolated sets until your pace stabilises, then sit a second full-length test to confirm it held. All practice tests on this site are free, require no account, and are written against the current CAS-005 objectives.