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CompTIA A+ Quick Reference (220-701, 220-702) by Ben Conry

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3. Operating Systems

The subject of operating systems (OS) is a significant area of the CompTIA A+ Exams. It makes up 20 percent of the 220-701 Essentials Exam and 37 percent of the 220-702 Practical Applications Exam. The operating system exam objectives look in depth at Windows 2000, Windows XP, and Windows Vista; it covers just the fundamentals of Linux and MacOS.

OS Concepts

The OS serves as the middleman between a user and the equipment. It handles resource management, such as hard drives, printers, I/O cards, and the user interface, such as mouse pointers, icons, and windows.

When troubleshooting an OS, first start with the hardware, and then move to BIOS, drivers, updates and service packs, and applications. Don’t rule ...

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