Think it through.
Build your security judgment, one question at a time.
A focused daily drill.
Session length is capped by available questions in your selection.
One sitting. All eight domains.
Practice pacing and committing to each decision. The next question adapts to your answers while balancing domain coverage.
- Submit once: you cannot go back or change an answer. Explanations appear after the exam.
- 25 items within the first 100 are hidden, simulated unscored items.
- After 100 questions, the simulation may stop above or below its threshold; otherwise it continues to 150 or time expiry.
- The timer continues through breaks, navigation, and reloads. This browser restores your latest exam.
ISC2’s passing grade is 700/1000, which does not mean 70% correct. This app uses its own illustrative ability scale with a 700 target. It cannot calculate an official CISSP score or predict whether you will pass.
The simulator uses 162 original applied scenarios checked against your study guide. Their authored relative challenge estimates are provisional and uncalibrated. Only multiple-choice items are simulated; ISC2 also uses advanced item types.
How this simulation works
A simple Rasch model updates a practice ability estimate after each scored answer. The next item targets that estimate within the domain most below its target share. A regularized estimate and approximate 95% interval drive stopping. These are our modeling choices, not ISC2’s proprietary algorithm.
Domain targets: D1 16% · D2 10% · D3 13% · D4 13% · D5 13% · D6 12% · D7 13% · D8 10%. Unscored answers do not affect the estimate. Correctness percentages in the final review are separate from the illustrative scaled score.
Format checked September 5, 2026: ISC2 CAT rules · Exam outline and passing grade.
For shorter sessions, choose your question count in Practice. CAT always uses the full 100–150 format.