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This bestselling exam preparation guide has been fully revised for new 2015 exam objectives Written by a leading expert on CompTIA A certification and training, this self-study book has been thoroughly updated to cover 100% of the exam objectives on the 2015 CompTIA A exams. New topics include managing and maintaining cellular devices, including tablets; configuring operating systems, including Windows 8, Android, and iOS; and enhanced, mobile-centered security and troubleshooting procedures.CompTIA A Certification All-in-One Exam Guide, Ninth Edition (Exams 220-901 & 220-902) enables you to take the tests with complete confidence. It also serves as a practical reference for IT support and technical personnel. Electronic content includes two full practice exams with more than 400 accurate practice questions, training videos from the author, and a complete PDF copy of the book.