Practice Test Answers

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1. B is correct. USB 2.0 supports up to 127 devices at speeds of up to 480 Mbps. USB 1.1 transfers data at up to 12Mbps. IEEE 1394 supports up to 63 devices at 400Mbps. IEEE 1284 is a parallel port. (Core Hardware)

2. A, B, C and D are correct. First-generation SATA can transfer data at up to 150MBps, with the potential for even higher rates in future releases. SATA devices are fully Plug-and-Play and hot-pluggable, and use thin, easy-to-handle serial cables. SATA is a magnetic disk type. (Core Hardware)


3. D is correct. Flash RAM is static RAM (SRAM). It accepts new data readily, unlike ROM (Read-Only Memory) but it holds it until it is erased or reprogrammed, unlike dynamic RAM (DRAM). SDRAM is Synchronous Dynamic RAM, a type of dynamic RAM. (Core Hardware)


4. C is correct. An L3 cache sits between the CPU and the RAM and helps with the transfer between them. An L1 cache is integrated into the CPU die on modern systems. An L2 cache is typically on a separate die within the CPU package. The PCI expansion bus is too slow to be of benefit for a cache. (Core Hardware)


5. A is correct. AMR stands for Audio Modem Riser, a specification for packaging analog components on an optional riser card rather than building them directly into the motherboard. When such a method is used for built-in networking, it is called a CNR (Communications Network Riser). AGP video cards go in AGP slots. Some systems do have EIDE riser cards (for example, in slimline cases) but they would be labeled as such. (Core Hardware)


6. A, B and E are correct. The V.92 standard introduced PCM Upstream, Quick Connect and Modem-On-Hold. Modems cannot use ISDN lines. X2 was an earlier standard, predating V.90. Both V.90 and V.92 both support up to 56Kbps transfer rate. (Core Hardware)


7. A, B and D are correct. Windows XP can read and write both 16- and 32-bit FAT drives and also NTFS5 drives. NTFS4 was used only in Windows NT 4.0. If you have an NTFS4 drive, Windows XP will upgrade it to NTFS5 during Setup without any data loss. HPFS was the file system for IBM’s now-defunct OS/2 operating system (Microsoft quit supporting it when NT 4.0 was introduced, but did support it in 3.1, 3.5 and 3.51). (OS Technologies)


8. A, B, C and H are correct. Data files such as BMP and TIF (graphics), AVI (video) and TXT (text) do not carry viruses. In contrast, most executable files can carry viruses, so EXE, COM and BAT files would be likely candidates, as well as scripting files like VBS (Visual Basic Script). Although a Word document (DOC) is a data file, it can contain macros (written in Visual Basic) that can contain viruses. (OS Technologies)


9. B is correct. Advanced Power and Configuration Interface (ACPI) handles both power management and device resource management on systems with an ACPI-compliant BIOS and a Plug-and-Play operating system. Advanced Power Management (APM) was an earlier standard for power management. DNS is a service for translating between IP addresses and domain names. DMA channels are one of the system resource types assigned to devices as needed, along with I/O addresses and IRQs. (OS Technologies)


10. B, C, E, F, G and I are correct. Preemptive multitasking, NTFS5, System Restore, Windows Update and running most MS-DOS applications are all present in both Home and Professional versions. (OS Technologies)


11. A is correct. An ERD is not bootable and does not contain the complete Registry. It works in conjunction with Windows Setup to repair a damaged installation. (OS Technologies)


12. D is correct. MSCONFIG is the System Configuration Editor, the utility you want for this job. SYSINFO is System Information, which displays but does not change info. SCANREG is the Registry Checker. TRACERT is Trace Route, for network path troubleshooting. (OS Technologies)


Faithe Wempen is a free-lance writer and technology instructor and the author of more than 80 books on computer hardware and software. She’s written extensively about A+ topics in numerous books and articles.

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