SG: Practice Exam 2

Question 1

Concerning the specialized drives recommended for an A/V editing workstation, which of the following statements is true?

A. The spin rate should be slower than 15,000 rpm.

B. The spin rate should be 7,200 rpm or faster.

C. Ensure that the application being used resides on the same drive as the operating system to ensure seamless access.

D. PATA drives with transfer rates of at least 6 Gbps should be used.

Answer 1

B. The spin rate should be 7,200 rpm or faster.

With nonlinear encoding (NLE) software, fast drives are a must. Furthermore, the hard drive housing the application being used for editing should not be the same as the one where the operating system resides. Uncoupling the two leads to the ability for concurrent access and lack of contention, thus avoiding performance degradation. Although it is true that SATA 6 Gbps is a wise choice for the drive interface, there is no such PATA (IDE) standard.

Question 2

Which of the following custom configurations most prominently includes file sharing?

A. A/V editing workstation

B. Gaming PC

C. NAS

D. Thick client

Answer 2

C. NAS

The NAS is a computer that is designed to share resources such as files and media for streaming. Other computers may use file sharing, but it is not a prominent feature to be designed around.

Question 3

Which of the following does not contribute to the cooling of system components?

A. Heat sink

B. Motherboard

C. Slot cover

D. Fan

Answer 3

B. Motherboard

Motherboards do not aid in the cooling process. Heat sinks draw heat away from components and radiate it via fins. Fans on the heat sinks flush them with cooler air, and system fans help in removing warmer air from the system or introducing cooler air into the system. Slot covers ensure that the original airflow design of the system case is not compromised.

Question 4

Which physical network topology uses the least amount of cabling?

A. Bus

B. Star

C. Mesh

D. Hybrid

Answer 4

A. Bus

Because of its design, which includes a central trunk that runs the distance between the two most distant computers (as long as it does not exceed the maximum distance allowed for the cabling), a bus topology requires the least amount of cable. Mesh networks require the most cabling, and star and hybrid networks are somewhere in the middle.

Question 5

What is the name for the successor to the system BIOS that expands on classic features by allowing modular extensions to the basic code?

A. MBR

B. EEPROM

C. Extended BIOS

D. UEFI

Answer 5

D. UEFI

The Unified Extensible Firmware Interface (UEFI) enhances the classic BIOS concept by starting with a base configuration and allowing its extension through UEFI partitions on attached storage devices.

Question 6

Which stage of a laser printer process melts the toner onto the paper?

A. Exposing

B. Charging

C. Fusing

D. Transferring

Answer 6

C. Fusing

The drum is first charged to prepare for the exposing stage, which charges the print pattern onto the drum. After toner is applied to the drum, the toner is transferred to paper. At this point, the toner is melted and fused to the paper by using heat.

Question 7

Which of the following are parallel computing architectures designed to break larger graphics-processing tasks into components that can processed simultaneously? (Choose two.)

A. OpenGL

B. NVIDIA

C. CUDA

D. DirectX

Answer 7

A. OpenGL

C. CUDA

CUDA, by NVIDIA, and OpenGL, its open-standard counterpart, are graphics-centric parallel computing architectures designed to speed up graphics processing on video cards.

Question 8

Which of the following is the most common paper-feed mechanism associated with a dot-matrix printer?

A. Gravity feed

B. Impact feed

C. Tractor feed

D. Dual feed

Answer 8

C. Tractor feed

Dot-matrix printers often use tractor feed paper-feed mechanisms. These are designed to pull or weave the paper through the printer. Some can use regular printer paper.

Question 9

You are installing a new power supply. What power supply feature supports two independent sources of 12VDC for internal components?

A. Auto switching

B. Dual rail

C. Switching vs. linear design

D. Extended wattage

Answer 9

B. Dual rail

The dual rail feature of modern power supplies provides independent 12VDC rails, which allow dedication of power to specific components, but which do not allow a single component to access the collective power from both rails.

Question 10

Which benefits of a USB connection make it the popular choice for printers? (Choose all that apply.)

A. It automatically recognizes new devices.

B. It has a higher transfer rate than a parallel connection.

C. It has a higher transfer rate than a serial connection.

D. It allows the printer to communicate with networks, servers, and workstations.

Answer 10

A. It automatically recognizes new devices.

B. It has a higher transfer rate than a parallel connection.

C. It has a higher transfer rate than a serial connection.

The rate of transfer and the ability to automatically recognize new devices are two of the major advantages that make USB a popular type of printer interface. However, it is the network printer interface that allows the printer to communicate with networks, servers, and workstations.

Question 11

Which of the following are differences between DVI-D and DVI-A interfaces? (Choose two.)

A. DVI-A interfaces have more pins than DVI-D interfaces.

B. DVI-A interfaces are larger than DVI-D interfaces.

C. DVI-D interfaces have more pins than DVI-A interfaces.

D. DVI-A interfaces have the same color code as VGA interfaces.

E. DVI-A interfaces use pins that DVI-D interfaces do not use.

Answer 11

C. DVI-D interfaces have more pins than DVI-A interfaces.

D. DVI-A interfaces have the same color code as VGA interfaces.

Despite the analog pins that DVI-D does not use, DVI-A interfaces use two fewer pins than DVI-D interfaces. The interfaces are the same size and both use an off-white color code, not the blue VGA color code.

Question 12

What is needed to be able to display local television broadcasts from the same type of cable used with standard TVs?

A. A video capture card

B. A filter

C. A splitter

D. A TV tuner card

Answer 12

D. A TV tuner card

TV tuner cards can decode the same signal used by televisions. Video capture cards can store the resulting video stream, but they cannot help with deciding the signal for display.

Question 13

Which of the following components in a laser printer charges the drum after it has been cleaned?

A. Transfer corona

B. Multiplier

C. Primary corona

D. Conditioning wire

Answer 13

C. Primary corona

The primary corona wire applies a negative charge to the drum after it has gone through the cleaning phase.

Question 14

Which of the following descriptions characterizes a gaming PC?

A. A computer with a RAID array and liquid cooling

B. A computer with advanced graphics and high-end cooling

C. A computer with a fast hard drive and surround sound

D. Any standard thick client

Answer 14

B. A computer with advanced graphics and high-end cooling

Gaming PCs are characterized by their enhanced GPUs, audio features, and cooling.

Question 15

You have been asked to install a network cable that offers the greatest level of resistance to electromagnetic interference (EMI). Which of the following network media would you select?

A. Coaxial

B. Fiber-optic

C. Ethernet

D. Twisted-pair

Answer 15

B. Fiber-optic

Because fiber-optic cables use light pulses over a glass fiber, as opposed to electrical signals over a copper conductor, fiber-optic cable is not susceptible to EMI. Coaxial and twisted-pair are copper cables, so they are susceptible to EMI. Ethernet is not a cable type, but a network access method.

Question 16

You are troubleshooting a computer and think that the CMOS battery might be bad. Which of the following is not held in CMOS memory while the system power is off?

A. Boot sequence

B. BIOS passwords

C. Operating system passwords

D. Memory and CPU settings

Answer 16

C. Operating system passwords

The CMOS memory only stores hardware-level settings, not those related to operating systems. Those settings are kept in files maintained by the operating systems.

Question 17

Which of the following is an error-checking scheme that is not capable of error correction and sometimes implemented in main memory?

A. ECC

B. Single-channel

C. Single-sided

D. Parity checking

Answer 17

D. Parity checking

Parity checking stores an extra bit with each byte in memory. When a byte is received by the CPU or a device that supports DMA, the validity of the parity bit is checked. If the check shows an error, the byte is rejected because there is no way to determine the nature of the error. ECC works differently, and it is capable of correcting single-bit errors. Single-channel and single-sided are physical characteristics, not error-checking schemes.

Question 18

When choosing an internal hard drive, which of the following rates of rotation could be considered the optimal speed for the best read and write performance?

A. 10,000 rpm

B. 7,200 rpm

C. 5,400 rpm

D. 5,000 rpm

Answer 18

A. 10,000 rpm

The faster a hard disk drive spins its platters, the faster that data can be read or written. Hard drives are manufactured to spin at a certain speed, most of which are given as options here. Therefore, the fastest speed listed, 10,000 rpm, could be considered optimal, at least in terms of read/write performance. It will also generate the most heat of any of the options.

Question 19

You currently have an old motherboard with an 8-pin power connector. Your power supply has failed. Your new power supply has a rectangular 24-pin connector coming from it. Which of the following statements is true?

A. You need an adapter to connect to your motherboard.

B. You need an adapter to connect to your hard drive.

C. You need an adapter to connect to your floppy drive.

D. That’s exactly the same connector your old power supply had. There is no problem.

Answer 19

A. You need an adapter to connect to your motherboard.

Device connectors for hard drives are the same as they have been since each one was introduced. It’s the motherboard power header that changes from time to time. Adapters exist to bridge the discrepancy, which means that there is a way to use the 24-pin ATX power supply with the other connectors on the older motherboard.

Question 20

Which type of printer can use ink that comes in a wax form?

A. Bubble-jet

B. Thermal

C. Laser

D. Dot-matrix

Answer 20

B. Thermal

Thermal printers use either heat only or heat along with a ribbon that contains a wax-based ink. Bubble-jet and dot-matrix printers use liquid ink, and laser printers use toner.

Question 21

You need to enable system-wide security. Which of the following is a technology that is dependent on UEFI and will load files at startup, only if the files have not been tampered with?

A. Power-on self-test

B. Master Boot

C. Secure Boot

D. ReadyBoot

Answer 21

C. Secure Boot

Secure Boot loads boot files only if their digital signatures are valid. The boot files checked include option ROMs, the boot loader, and other operating system boot files.

Question 22

Which of the following custom configurations benefit most from a RAID array? (Choose all that apply.)

A. A/V editing workstation

B. CAD/CAM design workstation

C. NAS

D. Gaming PC

E. Thin client

Answer 22

A. A/V editing workstation

B. CAD/CAM design workstation

C. NAS

A/V editing workstations and CAD/CAM workstations need fast drives. Even the non-fault-tolerant RAID 0 benefits these computers by increasing the speed of drive access. Network-attached storage (NAS) devices store a large amount of information that would be devastating to lose. The gaming PC needs a fast processor and video card, but has no need for large drive arrays. Thin clients usually have no drives at all.

Question 23

What is the difference between OpenCL and CUDA?

A. OpenCL is a Microsoft specification, and CUDA is an ATI specification.

B. OpenCL is a parallel processing architecture, and CUDA is serial.

C. CUDA is proprietary, and OpenCL is not.

D. OpenCL is for graphics processing, and CUDA is for regular CPU processing.

Answer 23

C. CUDA is proprietary, and OpenCL is not.

CUDA, a proprietary architecture from NVIDIA, and OpenCL, an open architecture, are both graphics-based parallel processing architectures.

Question 24

A client needs optical media that can be rewritten. Which of the following optical-disc suffixes indicates that the disc can be written to multiple times?

A. -ROM

B. -R

C. -RW

D. -DL

Answer 24

C. -RW

Of the options given, only rewritable (-RW or +RW) optical discs can be written to, erased (or formatted), and written to again multiple times. -ROM refers to the optical disc that is written to once, or the drive itself. -R means writeable once, and -DL means double layer.

Question 25

Which of the following statements about projection-system brightness is true?

A. Projector brightness should be compared in units of lux during the purchasing process.

B. Operating a projection system at a higher resolution will not produce as much brightness as when you run it at lower resolutions.

C. Projector bulbs can shine more brightly than standard light bulbs because projector bulbs do not use halogens.

D. It takes more lumens of brightness to display 3D video than it does to display 2D still images.

Answer 25

D. It takes more lumens of brightness to display 3D video than it does to display 2D still images.

The correct option is a double-whammy. Both video and 3D require more lumens of brightness than their alternatives. Lux is okay to use when comparing two projectors in the same setting, but it cannot be used appropriately to compare projectors on a shelf. For that, the lumen is the unit of measure to which you must pay attention. In any given scenario, projectors rated at a higher number of lumens should produce more lux. The brightness of a projection system is not related to the resolution you choose, but instead it is related to the brightness in lumens of the projector bulb, which remains the same across resolutions. The use of a metal halide is precisely why projector bulbs can burn more brightly as well as stay cleaner.

Question 26

Which of the following communication technologies is designed for a network known as a PAN?

A. Cellular

B. Infrared

C. Bluetooth

D. Ethernet

Answer 26

C. Bluetooth

Bluetooth was made to work as a wireless personal area network (WPAN). As such, it’s perfect for computer peripherals, such as keyboards, mice, and wireless headsets. Cellular, infrared, and Ethernet networks do not connect as PANs.

Question 27

Which of the following is definitely an analog video technology?

A. DVI

B. HDMI

C. DisplayPort

D. VGA

Answer 27

D. VGA

VGA is an analog video technology. DVI could be analog or digital. HDMI and DisplayPort are digital technologies.

Question 28

Which TCP/IP protocol uses port 23?

A. HTTP

B. SMTP

C. Telnet

D. POP3

Answer 28

C. Telnet

Telnet uses port 23. HTTP uses port 80. SMTP uses port 25. POP3 uses port 110.

Question 29

Which of the following would not be used to connect a printer to a system?

A. USB

B. PATA

C. Shared network access

D. Parallel port

Answer 29

B. PATAPATA is an internal interface used to connect hard drives, CD devices, and DVD devices. Parallel ports were traditionally used as printer ports because they supported faster speeds than serial ports supported. USB is popular today because it is even faster than a parallel port and easy to configure. Shared network access is used to share a printer among many networked users.

Question 30

Which of the following is the term for a collection of same-numbered tracks on all writable surfaces of all platters within a hard disk drive system?

A. Cluster

B. Logical block

C. Sector

D. Cylinder

Answer 30

D. Cylinder

The total number of tracks in a hard drive system can be found by multiplying the number of cylinders by the number of read/write heads in the assembly. The cylinder count is equivalent to the number of tracks on any one writable surface of any one platter.

Question 31

Which of the following would not be a reason to use a KVM switch?

A. There is only one administrator employed by the company.

B. Most server access is done remotely.

C. Four co-workers with their own computer systems and working on the same project are seated in four cubicles that form a square.

D. Saving money is a priority.

Answer 31

C. Four co-workers with their own computer systems and working on the same project are seated in four cubicles that form a square.

If multiple systems need to be accessed directly at the same time, a KVM switch is not an acceptable solution because it allows access to only one system at a time.

Question 32

You have been asked to implement a network topology that offers the greatest level of redundancy and fault tolerance. Which of the following topologies would you select?

A. Star

B. Mesh

C. Ring

D. Bus

Answer 32

B. Mesh

In a mesh topology, every computer is connected to every other computer. This makes it possible for connections to be maintained even if multiple cables are disconnected or severed. The cost and complexity of this topology increase because of the redundant connections.

Question 33

You need to install a storage solution for a client. Which RAID type offers no redundancy or fault tolerance?

A. RAID 0

B. RAID 1

C. RAID 5

D. RAID 10

Answer 33

A. RAID 0

RAID 0 offers larger volumes and read/write speed improvements, but no redundancy. If one drive is lost, so is all data in the array—hence, no fault tolerance. RAID 1 is a mirrored set; RAID 5 has parity; and RAID 10 is a mirror of a striped set. All of them offer fault tolerance.

Question 34

Which of the following devices are shared when using a KVM switch? (Choose two.)

A. Speakers

B. Input devices

C. A display unit

D. A NIC

Answer 34

B. Input devices

C. A display unit

KVM stands for keyboard, video, mouse. Therefore, input devices such as a keyboard and mouse, and a display unit will be shared. Speakers and NICs are not shared.

Question 35

You are selecting a storage device for a client, and they request a hybrid drive. Which of the following best describes a hybrid drive?

A. Contains both magnetic and solid-state storage

B. Uses RAID to create a volume set from both internal and external storage

C. Uses RAID to make a volume set out of a conventional hard drive and an SSD

D. Combines primary and secondary storage in one

Answer 35

A. Contains both magnetic and solid-state storage

Hybrid drives have a solid-state component, which is most often used for the operating system, some programs, and files that don’t change, and a conventional magnetic drive that provides considerably more storage and holds mostly data. RAID arrays can be composed from any type of hard drive. Secondary storage typically refers to offline storage, which is not relevant to hybrid drives.

Question 36

Which of the following is a concept that applies only to magnetic hard disk drives and not to solid-state drives?

A. Storage capacity

B. External attachment

C. Access time

D. RPM

Answer 36

D. RPM

RPM (rotations per minute) applies only to conventional magnetic hard drives with spinning platters. SSDs have no moving components. All hard drives have a storage capacity and an attachment of some sort, and can be rated on access time.

Question 37

Which of the following connections will provide the fastest data transfer speeds for a hard drive?

A. Molex

B. SATA

C. IDE

D. DB-9

Answer 37

B. SATA

The two common hard drive connection types here are SATA and IDE (PATA). Of the two, SATA is decidedly faster. It supports speeds of up to 6 Gbps, which equals data transfers of about 600 MBps. By comparison, IDE is limited to about 100 Mbps. Molex is a power connector type, and DB-9 connectors are for serial cables.

Question 38

Which of the following communication technologies is designed for use with peripheral devices such as keyboards, mice, and wireless headsets?

A. Bluetooth

B. Ethernet

C. Cellular

D. Infrared

Answer 38

A. Bluetooth

Bluetooth was made to work as a wireless personal area network (WPAN). As such, it’s perfect for computer peripherals such as keyboards, mice, and wireless headsets. Ethernet is used for networking, cellular primarily for mobile phones, and infrared for one-to-one short-distance communication.

Question 39

You are configuring a network and need to connect a local LAN segment to an external network. Which device will connect multiple networks together and determine the best path for sending data?

A. Hub

B. Router

C. Switch

D. Bridge

Answer 39

B. Router

Routers are highly intelligent devices that connect multiple network types and determine the best path for sending data. They can route packets across multiple networks and use routing tables to store network addresses to determine the best destination. Routers operate at the Network layer of the OSI model.

Question 40

Which of the following display technologies can be fashioned into the thinnest display units?

A. Fluorescent LCD

B. LED backlit LCD

C. Plasma

D. OLED

Answer 40

D. OLED

OLED panels consist only of LEDs. There are no other supporting layers or thick spaces, as with the other technologies. Therefore, they can be fashioned into the thinnest display units or even flexible display units.

Question 41

You are working with a laser printer. Which of the following components offers the greatest risk to technicians?

A. Fuser

B. Refuser

C. Corona wire

D. Drum

Answer 41

A. Fuser

When you are working with laser printers, the device most likely to cause damage is the fuser. The fuser works at high temperatures and can cause a burn.

Question 42

Which of the following is not an advantage of the daisy-wheel printer?

A. Can print multipart forms

B. Relatively inexpensive

C. Print quality is comparable to a typewriter

D. Speed

Answer 42

D. Speed

The daisy-wheel printer is much slower when compared to the dot-matrix printer, and therefore speed is a disadvantage.

Question 43

Which of the following pin counts have been used in the primary power supply connectors going to ATX and later motherboards? (Choose two.)

A. 4

B. 6

C. 8

D. 20

E. 24

Answer 43

D. 20

E. 24

ATX motherboards have used 20- and 24-pin connectors as their primary power leads to the motherboard. All pin counts listed have been used in connectors coming from the power supply, and even the P8/P9 primary AT motherboard connectors had only 6 pins each. However, only 20- and 24-pin connectors have been used for the same purpose in ATX and later motherboards.

Question 44

On which memory modules would you find DDR400 chips?

A. PC3200

B. PC400

C. PC2-3200

D. PC3-3200

Answer 44

A. PC3200

The 8:1 ratio between the numerical portion of the names of memory chips and the modules on which they are mounted results in chips having the lower number of the two. Therefore, DDR400 chips are found on PC3200 modules. PC2-3200 modules are DDR2 modules and have DDR2-400 chips mounted on them.

Question 45

Which of the following is the speed difference between USB 2.0 and USB 3.0 cables?

A. USB 2.0 is 480 Mbps, and USB 3.0 is 5 Gbps.

B. USB 2.0 is 5 Gbps, and USB 3.0 is 10 Gbps.

C. USB 2.0 is 10 Gbps, and USB 3.0 is 20 Gbps.

D. USB 2.0 is 12 Mbps, and USB 3.0 is 480 Mbps.

Answer 45

A. USB 2.0 is 480 Mbps, and USB 3.0 is 5 Gbps.

The USB speeds are as follows: 1.0 is 12 Mbps; 2.0 is 480 Mbps; 3.0 is 5 Gbps; 3.1 is 10 Gbps; and 3.2 is 20 Gbps.

Question 46

Which impact printer has a print head that contains a row of pins that are triggered in patterns that form letters and numbers as the print head moves across the paper?

A. Laser printer

B. Daisy-wheel printer

C. Dot-matrix printer

D. Bubble-jet printer

Answer 46

C. Dot-matrix printer

The dot-matrix impact printer’s print head contains a row of pins that are triggered in patterns that form letters and numbers as the print head moves across the paper.

Question 47

Which of the following is not a term relating to CPUs?

A. Hyperthreading

B. I/O port

C. Multicore

D. L1 cache

E. System bus width

Answer 47

B. I/O port

The communication between a CPU and the rest of the system is considered I/O from the perspective of the CPU, but an I/O port is not used for this purpose. I/O ports, such as USB or sound ports, are not directly related to the CPU.

Question 48

Which of the following descriptions characterizes an A/V editing workstation?

A. A computer with a RAID array and liquid cooling

B. A computer with advanced graphics and processing power

C. A computer with a fast hard drive and surround sound

D. Any standard thick client

Answer 48

C. A computer with a fast hard drive and surround sound

Audio/video editing workstations are characterized by their enhanced graphics adapters, audio features, and fast hard drives.

Question 49

With EP process laser printers, the laser discharges the charged photosensitive drum to _________ VDC.

A. +600

B. 0

C. –100

D. –600

Answer 49

C. –100

With EP process laser printers, the laser discharges the charged photosensitive drum to –100VDC.

Question 50

You are attempting to fix a laser printer. During printing, the toner does not seem to be placed on the paper. Which assembly is responsible for permanently pressing the toner into the paper?

A. Transfer corona

B. Fuser

C. Printer controller circuitry

D. Paper transport assembly

Answer 50

B. Fuser

The fuser assembly presses and melts the toner into the paper. The transfer corona transfers the toner from the drum to the paper. The printer controller circuitry converts signals from the PC into signals for the various printer assemblies. The paper transport assembly controls the movement of the paper through the printer.

Question 51

You have a computer that is running slowly when multiple applications are open. Increasing which of the following allows more applications to run simultaneously?

A. CPU speed

B. CPU bus width

C. HDD space

D. Memory

Answer 51

D. Memory

Applications and their data must reside in RAM during execution. Increasing anything but RAM, despite various benefits, does not lead directly to being able to run more applications simultaneously. Virtual memory, or using the hard drive to assist RAM, can delay error messages that indicate memory exhaustion, but you should not need to increase HDD space to optimize virtual memory. If so, then running multiple applications is not your biggest concern.

Question 52

What kind of cables use either a BNC connector or an RJ-45 connector?

A. Network cable

B. Telephone cable

C. Television connection

D. None of the above

Answer 52

A. Network cable

Both connectors are used for network cables; RJ-45 is used for twisted-pair Ethernet networks, and BNC connectors are used in 10Base2 networks. Telephone cables use RJ-11 connectors.

Question 53

You are choosing a flash technology for a school. Which of the following is not an example of a memory card format?

A. MicroSD

B. MicroCF

C. CF

D. xD

Answer 53

B. MicroCF

There is no micro version of CompactFlash modules. MicroSD is a smaller version of the SD format. CF is CompactFlash. xD is a Picture Card format.

Question 54

When setting up a gaming PC, which of the following qualifies as an enhanced cooling method?

A. Convection cooling

B. Liquid cooling

C. A heat sink

D. Both a front intake fan and a rear exhaust fan

Answer 54

B. Liquid cooling

Liquid cooling is an advanced cooling method, using water or another liquid to cool components. Convection cooling is the standard method of cooling, with or without heat sinks and fans.

Question 55

You just purchased a used system, and a BIOS password is preventing you from modifying the settings. Which of the following options allows you to gain access to the BIOS configuration when an unknown password prevents such access?

A. Repositioning a jumper on the motherboard to clear the CMOS memory

B. Holding down a BIOS-specific key or key sequence while booting the machine

C. Unplugging the computer for at least two minutes

D. Pressing F8 early in the boot sequence and selecting the option to clear the password from the resulting menu

Answer 55

A. Repositioning a jumper on the motherboard to clear the CMOS memory

Most motherboards have a Clear CMOS or Reset CMOS jumper that immediately resets the CMOS memory to its default state. Clearing the CMOS removes any BIOS supervisor and user passwords that might be set, along with many other user-configured BIOS settings, returning the BIOS to factory defaults.

Question 56

In which step of the laser printer printing process does a uniform –600VDC charge get applied to the EP drum?

A. Conditioning

B. Charging

C. Developing

D. Transferring

Answer 56

B. Charging

During the charging phase, the charging corona applies a uniform –600VDC charge to the photosensitive drum. The drum is then ready for the image to be written on it.

Question 57

What is the maximum number of devices that can be supported by USB?

A. 63

B. 127

C. 256

D. 16

Answer 57

B. 127

Though it is unlikely that it would ever be necessary, a single USB chain can theoretically support 127 different peripheral devices. This includes scanners, cameras, MP3 players, printers, keyboards, and so on.

Question 58

Which component has a switch that might need to be changed when moving a computer from one country to another?

A. PATA hard drive

B. SATA hard drive

C. Motherboard

D. Power supply

Answer 58

D. Power supply

Power supplies have voltage selector switches that allow the power supply to be used in regions, such as North America, that have power grids based on voltages in the 110–120 range with a 60 Hz phase but then be moved to other regions, such as Europe, where voltages in the range of 220–240 and a phase of 50 Hz is used. Hard drives and motherboards do not need to be configured per country.

Question 59

Which networking device transforms data into the format needed to be transmitted over a physical medium?

A. Switch

B. Firewall

C. Repeater

D. NIC

Answer 59

D. NIC

The network interface card (NIC) is responsible for transforming the data into the proper format needed to transmit over the network. Repeaters, switches, and firewalls will each take the data received and pass it along as is appropriate, but they do not transform data.

Question 60

What is the primary difference between an LCD monitor and an LED monitor?

A. LCD subpixels create the colors of the image instead of LED subpixels.

B. The LCD monitor commonly uses a fluorescent bulb as a backlight.

C. LED monitors use AC power for their backlight.

D. LCD monitors are newer to the market than are LED monitors.

Answer 60

B. The LCD monitor commonly uses a fluorescent bulb as a backlight.

An LED monitor actually is an LCD monitor. The only difference is that LEDs, not a fluorescent bulb, create the light that shines through the LCD panel. LED monitors are newer than LCD monitors and use DC power to light the LEDs. Fluorescent bulbs require AC power. Organic LED subpixels in an OLED monitor create the colors of their images, but LEDs in a LED monitor simply create the backlight.