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CompTIA Security+ certification practice exams, second edition (Exam SY0 - 401) is filled with more than 800 realistic practice questions - including new performance-based questions - to prepare you for this challenging exam. To help you understand the material, in-depth explanations of both the correct and incorrect answers are included for every question. This practical guide covers all official objectives for Exam SY0 - 401 and is the perfect companion to CompTIA Security+Certification Study Guide, Second Edition. Salient Feature800+ practice exam questionsTest engine that provides full-length practice exams and customized quizzes by chapter or by exam domain. NEW coverage of performance - based questions.