This book is designed to provide information about the CompTIA A+ Core 1 () and Core 2 () exams for the CompTIA A+ certification. Every effort has been made to make . Jan 1,  · The CompTIA A+ Core 2 () exam covers four domains. • Operating Systems (31%) • Security (25%) • Software Troubleshooting (22%) • Operational Procedures . CompTIA A+ Certification Exam: Core 1 () Exam Objectives Version About the Exam Candidates are encouraged to use this document to help prepare for the CompTIA A+ Core 1