CISSP Vault: CAT Exam Prep

Adaptive CAT-style CISSP simulator with 4,063 questions, choice-by-choice explanations, and English, Japanese, and Chinese study modes. Try 100 questions free.

Train for CISSP with an adaptive CAT-style exam—not just another fixed mock.

CISSP Vault combines 4,063 practice questions, structured explanations, and an adaptive exam engine in one focused study app. Study in English, Japanese, or Simplified Chinese, and switch any translated question to the original English with one tap.

ADAPTIVE CAT-STYLE SIMULATOR • 100–150 questions with a three-hour clock • Difficulty adjusts after every answer • Forward-only answering and blueprint-weighted coverage across all 8 domains • Ability trajectory and domain proficiency report after each run

4,063 PRACTICE QUESTIONS • Broad coverage of all 8 current CISSP domains • Timed mock exams, domain drills, and focused practice • Weak-area review, mistakes, bookmarks, and Question of the Day

CHOICE-BY-CHOICE EXPLANATIONS • Why the correct answer is right • Why each wrong option is tempting or incorrect • Key Takeaways: the concept being tested • Exam Technique: how to identify the intended answer • Mindset Traps: common judgment errors under exam pressure

TRACK REAL PROGRESS • Readiness score and domain mastery • Accuracy trends, exam history, and learning streaks • Daily reminders and targeted review • No account required • Questions and explanations work offline

100 QUESTIONS FREE Answer your first 100 questions at no cost. Then unlock the complete question bank and all features with one lifetime purchase. No subscription and no recurring fee.

CISSP® is a registered trademark of ISC2, Inc. This app is an independent study aid and is not affiliated with, endorsed by, or sponsored by ISC2.