CompTIA A+ Practice Tests

Appendix Answers and Explanations

Chapter 1: Hardware

1. 1. B. FireWire 800 can span 100 meters when implemented over fiber-optic cable. Over copper cable, it’s limited to 4.5 meters, like FireWire 400.

2. 2. A. A mini-ITX motherboard is a 6.7″ square. Nano-ITX motherboards are 4.7″ square, pico-ITX motherboards are 3.9″ × 2.8″, and mobile-ITX motherboards are 2.4″ square.

3. 3. A, C. A 32-bit OS can run on either a 32-bit or 64-bit processor, although you will not be able to fully utilize the 64-bit processor’s capabilities with a 32-bit OS. A 64-bit OS will run only on a 64-bit processor.

4. 4. A, B, C. The DC power supply (DCPS) converts house current into three voltages: +5VDC and –5VDC for the logic circuitry and +24VDC for the paper-transport ...