LITMIR.BIZ

67

C. This is an eight-pin PCIe connector. They also come in 6-pin configurations.

68

D. After installing a new printer, it’s good practice to print a test page to ensure functionality.

69

B. The high-voltage power supply (HVPS) provides the high voltages used by both the charging corona and the transfer corona during the laser printing process.

70

D. Wi-Fi (802.11a, b, g, n, or ac) and Bluetooth can be used to connect a printer temporarily to a single computer (or mobile device), and the connection does not have permanent status. This type of configuration is known as an ad hoc network connection. When Wi-Fi is used to connect printers to a network on a more permanent basis, it is known as infrastructure mode.

71

C. PCI-X version 2.0 introduced the current maximum bus speed, 533MHz. With an 8-byte (64-bit) bus, this translates to maximum throughput of 4266MBps, roughly 4.3GBps.

72

D. The power-on-self-test (POST) is a series of system checks performed by the system BIOS. Checking the system memory is part of the POST routine.

73

C. RAID 10 (also known as RAID 1+0) provides fault tolerance to RAID 0 through the RAID 1 mirroring of each disk in the RAID 0 striped set. It requires four hard disks.

74

C. The image is of a SATA connector, commonly used for internal hard drives.

75

A. MiniSD and microSD cards are smaller than standard SD memory cards. Adapters are available to allow them to work in standard SD slots.

76

A. There are two backlight technologies for LCD monitors: LED and fluorescent. Of the two, LED produces higher-quality images. OLED and plasma are display technologies, not backlight technologies.

77

A. The Northbridge is responsible for managing high-speed peripheral communications. The Southbridge manages slower onboard peripherals. There is no Eastbridge or Westbridge in a motherboard chipset.

78

C. To use a second monitor on a desktop computer, you need to install a second video adapter or have one video adapter with two monitor interfaces. Laptops often have an external monitor interface and are capable of providing video to the built-in screen and an external monitor at the same time.

79

B, C. Buffered memory modules include specialized chips that act as buffers for signals from the memory controller. By buffering these signals, the electrical load placed on the controller is reduced because the memory controller communicates in series with the register, instead of in parallel with the memory chips. The register performs the parallel communication with the chips.

80

A. That capacity of module might not have been in existence when the motherboard’s chipset was released. Sometimes flashing the BIOS is all that is required.

81

C. A modem allows computers to connect to a remote network (such as an ISP) via telephone lines. Modems were the most common Internet connection method in the 1990s but are uncommon today. NICs are expansion cards for network connections. USB and cellular are not expansion cards. Other types of expansion cards include video cards, sound cards, storage cards, TV tuner cards, and riser cards.

82

B, C. Touch screens, KVM switches, smart TVs, and set-top boxes are capable of both input and output. Digitizers are input devices, and printers are output devices. Multifunctional printers that have a scanner included can be classified as input and output devices, but a plain printer is output only.

83

A. DDR2 and DDR3 memory slots are both keyed, but the keys are in different places. Therefore, the memory will not fit into the slots on the motherboard.

84

C. During the transferring step, the positively charged paper pulls the negatively charged toner from the photosensitive drum at the line of contact between the roller and the paper.

85

C. The communications between the CPU and memory occur over what is known as the frontside bus (FSB), which is just a set of signal pathways connecting the CPU and main memory.

86

B. The user wants to make sure that the collate option is set properly. It will let her select whether she wants it to print pages in order (1, 2, 3.. 1, 2, 3.. and so on) or multiple copies of the same page at once (1, 1, 1.. 2, 2, 2.. and so forth). Other options you can often set up in the printer configuration settings are duplexing (printing on the front and back), orientation (portrait or landscape), and print quality (such as draft or high resolution).

87

A. The term aspect ratio refers to the relationship between the horizontal and vertical pixel counts that a monitor can display. For example, for a display that supports 4:3 ratios, such as 1600×1200, if you divide the first number by 4 and multiply the result by 3, the product is equal to the second number. Additionally, if you divide the first number by the second number, the result is approximately 1.3, the same as 4 ÷ 3.

88

D. Flashing the BIOS is the recommended way to upgrade a BIOS. It involves downloading the new BIOS and flashing software from the manufacturer and installing it on the computer. The worst-case scenario is replacing the motherboard (or in this case, the RAM, since that is what you upgraded).

89

A. CD-RW (re-writable compact disc) will be the least expensive of the optical solutions. In addition, CD-ROMs can store about 700MB to 900MB of data, depending on the standard used. This should be sufficient for the client.

90

C. A DVD-R double-sided dual-layer (DS, DL) will provide 17.1GB of storage. BD-R single-sided dual-layer (SS, DL) will also work in this case, providing 50GB of storage. (BD-R is a one-time recordable Blu-ray disc, and BD-RE is a re-recordable disc. Both have the same capacity.) A DVD-R SS, DL provides about 8.5GB of storage, and DVD-R DS, SL provides about 9.4GB of storage.

91

B. The connector shown is an RCA connector, which is often used for audio or video signals.

92

D. Lumens is the measure of brightness for a projector. For a well-lit business setting, you probably want a projector rated at 5,000–6,000 lumens.

93

C. Inkjet printers typically use a reservoir of ink (also known as an ink cartridge), a pump, and a nozzle to print images.

94

D. The number designation of 1600 in DDR3–1600 indicates an FSB speed of 1600MHz. To find the throughput, multiply the FSB speed by 8.

95

A. The refresh rate for plasma displays has always been in the 600Hz range, which is 10 times the standard refresh rate of 60Hz, thus ensuring fluid video motion. The result is a display that produces the state of the art in video motion fluidity.

96

C. DDR2, using a 100MHz actual clock, transfers data in four operations per cycle (effective 400MHz FSB) and 8 bytes per operation, for a total of 3200MBps. DDR2 calls these modules PC2–3200.

97

D. The connector pictured is a four-pin FireWire (IEEE1394) port on a laptop.

98

B. iPads and iPhones can automatically detect AirPrint-enabled printers on their local network and print to them without requiring the installation of a driver.

99

B. To communicate with other computers on a network, you need a network interface card (NIC). A wireless access point (WAP) is a wireless hub that many wireless devices communicate with, and WPA is a wireless security standard. A KVM switch allows you to have multiple systems attached to the same keyboard, video, and mouse. Other types of expansion cards (that could use the same slot as a NIC) include video cards, sound cards, storage cards, TV tuner cards, and riser cards.

100

D. A 1920×1200 resolution is a 16:10 aspect ratio. If you take the second number (1200) and multiply it by 1.6, you get 1920.

101

B. The printer driver uses a page-description language (PDL) to convert the data being printed into the format that the printer can understand. The driver

Скачать книгу