CompTIA A+ Complete Study Guide, 5th Edition

Appendix AAnswers to the Review Questions

Chapter 1: Motherboards, Processors, and Memory

1. A. The spine of the computer is the system board, otherwise known as the motherboard. All other computer components plug into the motherboard. On the motherboard, you will find the CPU, underlying circuitry, expansion slots, video components, RAM slots, and various other chips.
2. C. DDR4 SDRAM is manufactured on a 288‐pin DIMM, as is DDR5 (although the two are keyed differently and are not compatible). DIMMs with 224 pins and 296 pins do not exist. DIMMs with 240 pins are used for DDR2 and DDR3 SDRAM.
3. B. Remember the 8:1 rule. Modules greater than but not including SDR SDRAM are named with a number eight times larger than the number used to name the ...