Basic CompTIA A+ Quiz On Hardware Certification Test

Explanation
Wide SCSI buses support 16 devices, rather than the 8 devices specified in regular SCSI.

Explanation
Every other device can be set to any number as long as it's not in use. It is a recommended practice in the IT community to set the SCSI ID number for CD-ROM drives to 3.

Explanation
The head actuator is the device that physically positions the read/write heads over the correct track on the surface of the disk. It is called the same for CD-ROMs, hard drives and floppy disks.

Explanation
Explanation: Ultra2 SCSI (8-bit) is capable of 40MB/s transfers, with a maximum cable length of 12 meters (39 feet), also used the same connectors as Fast-10.

Explanation
On the AT motherboards the processor, memory, and expansion slots are all in line with each other. Because the processor and memory were in line with the expansion slots, only one or two full-length cards could be used. Also, the processor was far from the power supply's cooling fan and would therefore tend to overheat unless a heat sink or processor fan was directly attached to it. To overcome the limitations of the "baby" AT design, the ATX motherboard was designed. The ATX has the processor and memory slots at right angles to the expansion cards. This puts the processor and memory in line with the fan output of the power supply, allowing the processor to run cooler. And, because those components are not in line with the expansion cards, you can install full-length expansion cards in an ATX motherboard machine.

Explanation
The AGPx8 has a clock speed of 533 MHz and has a transfer rate of about 2.1GB/s.

Explanation
The South Bridge is generally used for slower devices such as USB ports, IDE drives, and ISA slots.

Explanation
CMOS is a memory chip that is designed to draw very little current. This memory is used to contain system configuration settings, BIOS passwords and time and date. BIOS is the Basic Input/Output System that could be referred to as the motherboard's firmware. BIOS is contained on a chip that usually is soldered to the motherboard and should not be replaced. Flashing a BIOS is the term used when upgrading the program (or firmware) on the BIOS chip.

Explanation
Power supplies are rated in Watts. Watt is the SI derived unit of power, equal to 1 Volt * 1 Ampere.

Explanation
When connecting the power cable of an AT power supply to the motherboard, the two wires on the power connectors (P8/P9) that should be together are the black wires. This is because the black wires are the ground wires, and connecting them ensures proper grounding and electrical continuity between the power supply and the motherboard.