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

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1. Hardware

Hardware is one of six domains in the CompTIA A+ Exams. It is a major piece of both exams. Hardware accounts for 27 percent of the 220-701 Essentials Exam and 38 percent of the 220-702 Practical Applications Exam.

CPUs

The Central Processing Unit (CPU) is the main processing unit of the personal computer (PC). It has an integral relationship with the motherboard and the system memory. These three devices control the data-processing aspect of the PC. Drives handle data storage, and input/output (I/O) interfaces allow human interaction, communication with peripherals, and network communication.

RISC Versus CISC

Most general purpose PCs use a complex instruction set chip (CISC). Many dedicated computers used in ...

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