Certified Information Systems Auditor Practice Tests

What to Expect

The Certified Information Systems Auditor exam costs $575 for ISACA members, $760 for non-members. ISACA membership is $135/year and worth getting — the exam discount alone almost covers it, plus you get access to the QAE database and other study resources. You'll face 150 questions in 240 minutes, giving you roughly 1 minute and 36 seconds per question. Scaled score from 200 to 800, passing at 450. The scoring accounts for question difficulty, so a 450 doesn't mean you answered exactly 56% correctly — it's adjusted.

Prerequisites and Audience

Five years of professional experience in IS audit, control, assurance, or security. That's a substantial requirement, but waivers of up to three years are available for relevant education or certifications. A master's degree or CISA-qualifying certification can knock off significant time. You can also take the exam first and apply for the certification once you have the experience. IT auditors, audit managers, compliance professionals, and security consultants who evaluate information systems. If your job involves assessing whether IT controls are working, identifying gaps, and writing audit reports, CISA is your professional credential. It's the standard in the IS audit profession.

Staying Certified

Three-year cycle with 120 CPE hours (minimum 20 per year) and an annual maintenance fee — $45 for ISACA members, $85 for non-members. The member rate is another reason to keep your ISACA membership active.

Five domains: Information Systems Auditing Process (21%), Governance and Management of IT (17%), IS Acquisition, Development and Implementation (12%), IS Operations and Business Resilience (23%), and Protection of Information Assets (27%). Protection of Information Assets is the heaviest at 27% — expect a lot of questions about security controls, access management, and data protection from an auditor's perspective.

Information Systems Operations and Business Resilience

Information Systems Operations and Business Resilience carries 26% of the exam weight, making it the single most impactful domain. Allocate your study time accordingly and make sure you can answer questions on this topic confidently before sitting the exam.

Protection of Information Assets

Protection of Information Assets carries 26% of the exam weight, making it the single most impactful domain. Allocate your study time accordingly and make sure you can answer questions on this topic confidently before sitting the exam.

Governance and Management of IT

Governance and Management of IT at 18% is a substantial portion of the exam. You can't afford to be weak here. Focus on understanding the core concepts and common scenario patterns.

Information Systems Auditing Process

Information Systems Auditing Process at 18% is a substantial portion of the exam. You can't afford to be weak here. Focus on understanding the core concepts and common scenario patterns.

Question Format

Multiple-choice, 150 questions in 240 minutes. Every question puts you in the auditor's seat. You'll read about a scenario and decide what an IS auditor should do: identify the finding, assess the risk, recommend a control, or report to management. The mindset shift is critical.

Study Timeline

Three to four months for IT professionals who already have audit experience. If you're coming from a security or IT background without audit methodology experience, add extra time to understand how auditors think — evidence gathering, sampling, control testing, and reporting practices are different from security engineering.

Top Resources

The CISA Review Manual is the primary textbook — don't skip it. The ISACA QAE database gives you practice questions in the exam format and is worth the investment. ISACA review courses (both online and in-person) provide structured prep. Make sure you understand COBIT and IT general controls (ITGCs) — they come up constantly.

Common Mistakes

The number one mistake is answering as a security professional instead of an auditor. The auditor's job is to assess, evaluate, and recommend — not to implement solutions. When a question describes a control weakness, the right answer is almost never "fix it yourself." It's "document the finding, assess the risk, and recommend remediation to management." That mental shift is everything.

Hands-On Advice

Read real IT audit reports to understand how findings are structured: observation, criteria, risk, and recommendation. Practice mapping controls to risks — pick a system you know and identify what could go wrong, what controls should exist, and how you'd test them. Study the COBIT framework enough to understand how IT governance connects to business objectives. This conceptual mapping is what separates good CISA candidates from great ones.

Testing Options

PSI testing centers and online proctoring. Note that ISACA uses PSI, not Pearson VUE — it's a different platform than most other certs.

Time Management

You get 240 minutes for 150 questions — about 1.6 minutes each. The pace is reasonable, but read carefully. Audit questions often hinge on exactly what's being asked: are you identifying a finding? Recommending a control? Assessing risk? Or reporting to governance? The right answer changes based on that distinction.

How Hard Is This Exam?

On a scale of 1 to 10, CISA is about a 7. The difficulty isn't conceptual depth — the individual audit topics aren't impossibly hard. It's the volume of content (five dense domains) combined with the requirement to think like an auditor, not a security professional or IT administrator. Every question puts you in the auditor's chair, and if your instinct is to fix the problem instead of assess and report it, you'll pick the wrong answer consistently. Protection of Information Assets at 26% and IS Operations and Business Resilience at 26% together make up over half the exam. The ISACA-specific terminology can also trip up candidates who've studied other frameworks — terms like "substantive testing" and "variable sampling" have precise meanings you need to know.

Pass Rate Data

ISACA doesn't officially publish pass rates. Community estimates suggest a first-attempt rate of around 50-60%. Among candidates with real audit experience and structured study plans, the rate improves to about 70%. If you're consistently scoring above 70% on practice tests while answering from the auditor's perspective, you're likely ready. The 450/800 passing threshold seems low (56%), but the scaled scoring means you need stronger performance than that percentage implies.

Each Pruvos practice test mirrors the CISA format: 150 questions with a 240-minute timer, distributed across five domains — Information Systems Operations and Business Resilience (26%), Protection of Information Assets (26%), Information Systems Auditing Process (18%), Governance and Management of IT (18%), and Information Systems Acquisition, Development, and Implementation (12%). We have 6 full practice tests with 900 unique questions. The auditor mindset is what this exam really tests, and our questions are written to reinforce that perspective. If your Protection of Information Assets or IS Operations scores are below 65% after Test 1, those domains deserve priority attention since they make up over half the exam.

Practice tests are the single most effective study tool for the CISA exam. They reveal your weak domains before the real exam does, and getting questions wrong in practice is how you learn. Each practice test here mirrors the real exam format: 150 questions, timed at 240 minutes, with the same 5-domain distribution.

Don't just take practice tests and check your score. Review every wrong answer and understand why the correct option is better. For the CISA, pay special attention to Information Systems Operations and Business Resilience (26%) and Protection of Information Assets (26%) questions since they carry the most weight.