IT Essentials v8 (ITE v6.0 + v7.0) A+ Cert Practice Exam 1 Test Online

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RDRAM, DDR2, and DDR3 RAM do not offer any error correction abilities for data within the memory module. ECC RAM allows for the detection of multiple bit errors and correction of single bit errors within the memory modules.

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The Northbridge chipset allows the fastest components to interface with the CPU at the front side bus speed, namely the RAM and video card. All other components like the USB, FireWire, and the expansion buses communicate with the CPU via the Southbridge chipset.

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The Northbridge chipset allows the fastest components such as the RAM and the video card to interface with the CPU at the front side bus speed. All other components such as the USB and FireWire ports, and the expansion slots communicate with the CPU via the Southbridge chipset.

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A RAID array 0 allows for striping over a variety of disks without providing for any redundancy. This allows for faster read and write functions because they are spread over multiple drives and thus adds the benefit of the simultaneous use of multiple actuator arms of the various hard drives.

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A video capture card enables video to be saved as a file on the computer hard drive from a video recorder. A TV tuner card enables television signals to be received and viewed by the computer. A video adapter enables the computer to display computer output on a screen. A network interface card enables the computer to connect to a data network.

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DDR SDRAM transfers data twice per clock cycle, whereas SDRAM transfers data once each clock cycle. Both DDR SDRAM and SDRAM are forms of dynamic memory. The difference in data transfer rate between DDR SDRAM and SDRAM is not determined by the number of pins, nor the operating voltage.

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Because the system has already has a high end graphics card and a liquid cooling system, it is already optimized for the gaming environment and the introduction of the new additional RAM would add to its performance. The only hardware component that could result in the lag in performance in this scenario is the hard drive, which would perform much faster when replaced with an SSD.

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USB 2.0 allows transmission speeds up to 480 Mb/s and USB 1.1 allows transmission rates of up to 12 Mb/s in full-speed mode. A transmission speed of 450 Mb/s would indicate that a USB 2.0 port was used on the computer because USB devices can only transfer data up to the maximum speed allowed by the specific port. The generally accepted maximum length of a USB 3.0 cable is 9.8 ft (3m) which is three times the length of the cable used in this example, so the cable length is acceptable for full USB 3.0 capability. If a USB cable is faulty then no data transfer at all is likely to occur.

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A DVI-D cable will carry video digital signals only, and the S-Video and VGA cable types carry only analog video signals. An HDMI cable will carry both the audio and video digital signals.

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HDMI and Mini-HDMI cables will carry both audio and video digital signals. VGA and composite cables will carry analog video signals. DVI-D cables will carry Digital video signals only.

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For monitors of the same Plasma monitors consume the highest amount of power followed by LCD monitors and than LED monitors. Of the different types of LED monitors, OLED monitors will offer the deeper dark levels in the display.

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Native resolution will provide the optimal resolution supported by the monitor.

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The aspect ratio of a display is the width divided by the height.

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Dual monitors are useful in a video editing station. Liquid cooling assemblies and high-end graphics cards are normally required in high performance gaming systems. A virtualization workstation would need maximum RAM and CPU cores.

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A TV Tuner card is normally used for an home entertainment system and a high end sound card is normally used for a gaming system. Windows 7 Home edition would not be the operating system of choice on a CAD station. A CAD station would normally require a specialized graphics card, large amounts of fast RAM, and a high performance storage device, such as SSD.

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The applications used by the computer user will dictate the amount of hard drive storage space, RAM, and sometimes the number of displays.

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The temperature of the power supply does not indicate if it is operational. A PC technician should never open a power supply as dangerous voltages might still be present even when disconnected. Disconnecting the connectors in turn and powering the PC is not a recommended practice. In the absence of a power supply tester, a multimeter can allow to check if voltages are present.

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Thermal compound is the first item of contact with the CPU, which then dissipates the heat to the cooling fins. The heat is conducted away from the CPU by the CPU fan and finally exhausted through the case fans.

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The CPU must be securely installed in its socket on the mother board before the thermal paste is applied, the heat sink and fan assembly is installed, and the fan is connected to the CPU fan power connector on the motherboard.

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A SATA connector is used to connect to the newer SATA hard drives and SATA optical drives. A PS/2 port is used to connect to a mouse or keyboard. A FireWire port is used to connect to Firewire devices such as cameras. A Molex connector is used to connect to older PATA hard drives and optical drives. A Berg connector is used to connect to floppy drives.

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20-pin power supply connectors are compatible with the 24-pin socket on the motherboard, so the replacement power supply can be used temporarily if necessary. A power supply 20-pin-to-24-pin adaptor does not exist. Power supplies are not considered to be field repairable, so it is not recommended that the technician attempt to modify the power supply connections, although this is not required in this situation.

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A Molex connector is used to connect older drives like IDE and EIDE drives . A SATA power connector is used with a SATA hard drive. A PCIe graphics card requires a 6- or 8-pin power connector.

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USB connectors, PC power button, and drive activity light are the most common PC front panel functions. If available, the network activity light, CPU temperature indicator, and audio power button are not typically located on the front panel of the computer.

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A technician would use the BIOS to monitor CPU clock speed and CPU fan speed if overheating was suspected. Monitoring the motherboard voltage, hard drive speed, and Trusted Platform Module settings would not provide information relevant to computer overheating.

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RAID installations require two or more hard drives. Floppy drives and DVD drives cannot form part of a RAID array. A USB connector may be used to access external hard drives that are not part of a RAID array.

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RAID 5 best meets the required storage and cost specifications. RAID 0 provides data striping without redundancy. RAID 1 uses disk mirroring and has a high cost. RAID 0+1 combines data striping and mirroring but also has a high cost.

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Dust inside a PC can cause overheating, fan malfunction, and other problems. Liquid should not be used inside a PC to remove dust; compressed air will blow the dust away from where it has accumulated. Always hold the can upright and avoid dripping any of the fluid on the PC. Care should be taken to make sure that the compressed air does not blow materials back inside the case, and that fan blades are stabilized while using the compressed air.

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Causes of a BSOD include a corrupt or incompatible driver or incorrect settings for the CPU voltage, which can result in the CPU not functioning correctly and a BSOD.

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If the power supply has failed the PC would turn off or could display a stop error message if the failure is partial. The index service not running does not cause a PC to lockup. No startup file is likely to be corrupted as the issue appears during normal operation. An overheading CPU would cause the computer to lockup.

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Not having enough RAM or the computer overheating can cause a computer to run slowly. An overclocked CPU would tend to speed up the computer. If the RAM is not compatible with the motherboard, the computer would not start up. Partitioning a hard drive does not cause the computer to run more slowly.

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A Wide Area Network (WAN) is a collection of geographically dispersed networks. A Local Area Network (LAN) is a network contained in a single floor, building, or campus. A Personal Area Network (PAN) is a network that reaches at most 10 meters. A Storage Area Network (SAN) is a network specifically constructed to connect storage devices to each other.

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A DHCP server can provide several parameters such as IP address, subnet mask, default gateway, and other optional parameters. The host name, media state, and description are present even if a DHCP server is not found.

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DNS uses port 53 and translates URLs to IP addresses. SMB provides shared access to files and printers and uses port 445. Port 80 is used by HTTP. HTTP is a protocol used to communicate between a web browser and a server.

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A gateway is a router used to interconnect networks and is not necessary in this situation. A hub does not segment a network and allows collisions to take place on the network segment. A switch will interconnect all the devices in a LAN.

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Modems are used to connect computers to POTS analog lines. Hubs, routers, and switches work using digital signals at all times.

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The purpose of a hub is to extend the cabling range by regenerating and repeating signals. Switches,routers, and firewalls send data to the destination by examining the header of the packet to determine the exit ports.

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A switch will select the outgoing port for every data frame based on the MAC destination address. A hub will flood all ports with any traffic. A router will select the outgoing port based on the IP destination address and the modem is used to connect the LAN to a WAN.

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RJ-45 is used to connect twisted pair cables. RJ-11 is used in telephony. BNC is used to connect 10BASE2 cables, a type of coaxial cable also known as thinnet. RCA connectors are used for analog or digital audio or analog video. SC, ST, and LC connectors are used for fiber-optic cables.

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A failed LCD screen will result in no image being displayed whereas a corrupt video driver or bad battery will not result in a dimmed display. The inverter powers the backlight, which in turn displays and illuminates the image.

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RDRAM, DDR2, and DDR3 RAM do not offer any error correction abilities for data within the memory module. ECC RAM allows for the detection of multiple bit errors and correction of single bit errors within the memory modules.

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The Northbridge chipset allows the fastest components to interface with the CPU at the front side bus speed, namely the RAM and video card. All other components like the USB, FireWire, and the expansion buses communicate with the CPU via the Southbridge chipset.

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The Northbridge chipset allows the fastest components such as the RAM and the video card to interface with the CPU at the front side bus speed. All other components such as the USB and FireWire ports, and the expansion slots communicate with the CPU via the Southbridge chipset.

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A RAID array 0 allows for striping over a variety of disks without providing for any redundancy. This allows for faster read and write functions because they are spread over multiple drives and thus adds the benefit of the simultaneous use of multiple actuator arms of the various hard drives.

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A video capture card enables video to be saved as a file on the computer hard drive from a video recorder. A TV tuner card enables television signals to be received and viewed by the computer. A video adapter enables the computer to display computer output on a screen. A network interface card enables the computer to connect to a data network.

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For monitors of the same Plasma monitors consume the highest amount of power followed by LCD monitors and than LED monitors. Of the different types of LED monitors, OLED monitors will offer the deeper dark levels in the display.

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Native resolution will provide the optimal resolution supported by the monitor.

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802.11n operates at both 2.4 GHz and 5 GHz and is backward compatible with 802.11b and 802.11g. 802.11b and 802.11g operate at 2.4 GHz only. 802.11a and 802.11ac operate at 5 GHz only.

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A proxy server has the authority to act as another computer. A popular use for a proxy server is to act as storage or cache for web pages that are frequently accessed by devices on the internal network. In addition, a proxy server can effectively hide the IP addresses of internal hosts because all requests going out to the internet are sourced from the IP address of the proxy server.

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An online DNS service can provide domain name registration and name resolution for the registered domain services. This service eliminates the need for setting up a fully functional DNS server in the small company.

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When a wireless network in a small office is being set up, which type of IP addressing is typically used on the networked devices?

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In the North America domain, 11 channels are allowed for 2.4GHz wireless networking. Among these 11 channels, the combination of channels 1, 6, and 11 are the only non-overlapping channel combination.

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Before any solutions can be proposed or tested, the problem must first be identified. This is done by gathering information from the customer by asking questions and clarifying details of the problem.

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The fact that the workstation can print at a networked printer indicates that the TCP/IP stack is functional. However, that the workstation cannot communicate with external networks indicates that the most likely problem is the incorrect default gateway address. If the workstation is configured to obtain an IP address automatically, the DHCP server address does not to be configured.

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When workstations are configured with obtaining IP address automatically but DHCP servers are not available to respond to the requests, a workstation can assign itself an IP addresses from the 169.254.0.0/16 network.

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A global positioning system (GPS) is used for geographic location, navigation, and specialized search results. Both iOS and Android devices have a Location or Location services setting to control whether the GPS is turned on. The WiFi/GPS antenna may need to be replaced if the location service is turned on but GPS still does not work.

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A smart watch commonly has many of the same functions of a smart phone such as receiving/placing calls, playing online games, and using applications such as a calculator or geolocator.

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Infrared (IR) is a wireless connection technology. It can be used to control other IR-enabled devices remotely, such as a TV, set-top box, or audio equipment.

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For an external display device to display a laptop screen, the video cable should be connected firmly on both ends. In addition, the laptop needs to send the video signal to the display device.

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Native resolution will provide the optimal resolution supported by the display on a laptop.

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The problem of a flickering laptop display is most likely caused by the image not refreshing fast enough or by a malfunctioning/damaged inverter.

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The native resolution would provide the best image display. In this scenario, the user should try the native resolution first and then adjust to other resolution options if needed.

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A vertical line could be a sign of a faulty drum or a problem with the toner cartridge. The toner cartridge is the easiest one to test if it is faulty and can be reused later if it turns out to not be the problem.

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A networked printer might have a backed up print queue caused by the printer being offline, out of paper, or a paper jam. There might also be a document stuck in the print queue causing all of the others after it to not print. Check the printer for any issues first then check the print queue and see if sending a different document to the top of the queue or canceling the document at the top of the queue frees up the printer.

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The hypervisor does not protect the hosting OS from malware. Neither does it allow sharing software across virtual machines. The hard drive of the supporting computer does not need to be partitioned to run virtual machines. The hypervisor creates and manages virtual machines on a host computer and allocates physical system resources to them.

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Virtual machines are susceptible to the same security threats that a host computer is. All security measures that are recommended for a computer in a home or business environment should also be taken within the virtual environment.

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Windows Hyper-V in Windows 10 has the following minimum requirements:

• 64-bit operating system
• BIOS virtualization support and hardware enforced data execution prevention
• 4 GB RAM
• Windows 10 Enterprise, Pro, or Education editions
• CPU support for VM Monitor Mode Extension (VT-c on Intel CPUs)

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In creating a virtualized environment, the hypervisor creates a virtual NIC that works with the host physical NIC. It virtualizes the network resource to be shared with all VM virtual NICs in providing network connectivity.

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A virtual desktop is one where the desktop and all applications are run from a server. A virtual desktop uses a virtual NIC.

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A hypervisor is used to create a virtual machine (VM). The hypervisor can be part of an operating system such as Windows Hyper-V or it can be downloaded from a virtualization vendor such as VMWare or Oracle.

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With measured service of the Cloud model, the resource usage can be easily monitored, controlled, reported, and billed to provide full visibility to both the Cloud service provider and customers.

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Whenever a company has an infrastructure device like a router or switch in the company cloud solution, the cloud model being used is IaaS.

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A private cloud is a cloud-based service where the company manages the devices or applications within the cloud. They are just located away from the business at a provider site. If a company is using a public cloud, a provider manages the devices or the applications or both for the company. A hybrid cloud is a combination of two types of clouds, and a common practice is a private and public cloud combination.

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Software as a Service (SaaS) is a cloud computing type that provides access to one or more applications through a server. This server is not owned or managed by the company using the application.

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If a hard drive makes repeated clicking or tapping sounds when the computer is idle, the hard drive is failing. Make a backup and replace the drive as soon as possible. Invalid boot disk errors and files that suddenly will not open are symptoms of hard drive issues.

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A virtual reality (VR) headset can be used in a training situation for educational purposes such as touring a remote location, military training, or medical training. Gaming applications are also popular. A person wears a special headset that projects a slightly different image to each eye, allowing the image to be viewed in 3D. The person may also wear headphones and a microphone depending on the application.

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Network Address Translation (NAT) is the process used to convert private addresses to internet-routable addresses that allow office devices to access the intern