Mobile Device IV

Front

Which of the following is NOT categorized as wearable technology? VR headsets, Smartwatches, Fitness monitors

Back

Phablets

Answer explanation

Phablets are essentially large smartphones. Their size is smaller than a tablet but larger than a smartphone. Generally, smartphones that have screen sizes between 5.5" and 7" are considered phablets by manufacturers. Many phablets also come with a stylus for note-taking on the larger screen size instead of using your finger. Smartwatches, fitness monitors, and VR headsets are all considered wearable technology or wearables. Fitness monitors are wearable mobile devices that focus on tracking the health and exercise habits of their users. A high-end smartwatch (for example, an Apple Watch) will allow the user to see their notifications, chat activity, and even make phone calls. A mid-range or low-end smartwatch can still have the ability to read your chat and notifications, but you may be unable to make phone calls from it. A virtual reality headset (VR) is a headset worn like goggles to interact with images displayed in the headset. Virtual reality is a computer-generated, simulated environment experienced via a headset connected to a PC or powered by a smartphone.

Front

A company wants to ensure that its mobile devices are configured to protect any data stored on them if they are lost or stolen. Which of the following should you enable and enforce through their MDM?
Options: Enable OS updates, Enable SSO, Remove backups, Full storage encryption

Back

Full storage encryption

Answer explanation

Mobile device management (MDM) software suites are designed to manage the use of smartphones and tablets within an enterprise. Full storage encryption is used to encrypt the user and system data stored in the device’s internal storage. The encryption key is stored in a protected portion of the device and can be used to remotely wipe the device if it is lost or stolen. Single sign-on (SSO) is an authentication technology that allows a user to authenticate once and receive authorizations for multiple services. Operating system updates are made freely available by the software manufacturer to fix problems in a particular software version, including any security vulnerabilities. Updates can be classified as hotfixes (available only to selected customers and for a limited problem), patches (generally available), and service packs (installable collections of patches and software improvements). A backup is a copy of user and system data that can enable the recovery of data after data loss or a disaster.

Front

A customer is upset that their laptop is too slow during the bootup process and when loading programs. The laptop is configured with an Intel i7 processor, 16 GB of RAM, a 500 GB HDD operating at 5400 RPM, and a dedicated GPU with 8 GB of RAM. Which upgrade should you install to best increase the system's performance? Options: Integrated GPU, Integrated GPU, 512 GB SSD, 2 TB HDD

Back

512 GB SSD

Answer explanation

Based on the system specifications, the system's slowest part appears to be the 5400 RPM hard disk drive (HDD). Therefore, replacing the HDD with a solid-state device (SSD) would dramatically increase the loading speeds as the operating system and other programs are read from the storage device during bootup and when loading programs. Another viable option would be to purchase a faster HDD, such as operating at 7200 RPM or 10,000 RPM. Still, though, an SSD would be faster than a higher RPM HDD, so it remains the best answer. If the laptop had 4GB or less of memory then it would be appropriate to increase the memory to 8GB or 16GB to increase the speed. An integrated GPU cannot be upgraded on a laptop since the integrated GPU is built into the CPU of the laptop, nor could a dedicated GPU be added to most modern laptops.

Front

You have been asked to fix a laptop with a screen image that is being displayed upside down. What is the BEST method to fix this issue?

Back

Change the orientation of the screen

Answer explanation

Windows offers a beneficial function for viewing documents or playing pranks on your friends. With a simple key combination, you can rotate your screen in any direction - flip it upside-down, or lay it on the side. To change your laptop screen orientation, hold down the Ctrl and Alt keys on your keyboard, then press the up/down/left/right arrow key. You can also change your screen orientation in the Windows display settings. An integrated GPU is part of the laptop's CPU and cannot be easily replaced. The display drivers and the LCD panel are not the cause of the issue since you can see the screen image properly (although it is being displayed upside down).

Front

Which type of laptop display should Jason purchase to support a high refresh rate of 120 Hz or 144 Hz? Options: VA, Plasma, IPS, TN

Back

TN

Answer explanation

: A twisted nematic (TN) LCD panel uses technology where the panel is black when no electric current is running through the liquid crystal cells because the cells align themselves in a twisted state. When an electric current is applied, the liquid crystal cells untwist, allowing light to pass through, resulting in a white display screen. TN displays can be made with high refresh rates of 120 Hz or 144 Hz which makes them popular with gamers. An in-plane switching (IPS) LCD panel uses technology designed to resolve the quality issues inherent in TN panel technology, including strong viewing angle dependence and low-quality color reproduction. IPS displays have great color accuracy, but they do not support higher refresh rates sought after by gamers. A vertical alignment (VA) LCD panel uses technology designed to have liquid crystals lay perpendicular to the glass substrate when power is removed and in a vertical position when voltage is applied. This allows light to move through the liquid pixels when voltage is applied and the image is then produced. VA displays are a good middle-ground between IPS and TN panel displays. A plasma display is a type of flat panel display that uses small cells containing plasma with ionized gas that responds to electric fields. Plasma displays create excessive heat and are not as energy efficient as an LCD, LED, or OLED display.

Front

Which cloud service provides access to Docs, Sheets, Drive, and other productivity tools using a subscription-based pricing model? Options: Microsoft 365, iTunes, iCloud, Google Workspace

Back

Google Workspace

Answer explanation

Google Workspace is a collection of cloud computing, productivity and collaboration tools, software, and products developed and marketed by Google. Microsoft 365, formerly Office 365, is a line of subscription services offered by Microsoft which adds to and includes the Microsoft Office product line. Apple’s online cloud storage and file synchronization service for macOS and iOS devices is called iCloud. The service provides a centralized location for mail, contacts, calendar, photos, notes, reminders, and files online. Apple’s iTunes is a media player, media library, Internet radio broadcaster, mobile device management utility, and the client app for the iTunes Store. It is not a cloud-based solution for synchronization.

Front

You just bought a new car and want to use the built-in stereo to make and receive calls on your smartphone. Which of the following should you perform to connect your smartphone to the car stereo? Pairing the device, Enabling NFC, Enabling Wi-Fi, Installing the device drivers

Back

Pairing the device

Answer explanation

By pairing the device, you will establish the Bluetooth connection between your smartphone and the car stereo. Bluetooth is commonly used to create a wireless connection between a smartphone and a car stereo for making/receiving phone calls, streaming music from the smartphone to the stereo, and other functions supported by the stereo. Bluetooth is a wireless technology standard used for exchanging data between fixed and mobile devices over short distances using UHF radio waves in the industrial, scientific, and medical radio bands from 2.402 GHz to 2.480 GHz and building a personal area network (PAN). Near-field communication (NFC) is a set of communication protocols that enable two electronic devices, one of which is usually a portable device such as a smartphone, to establish communication by bringing them within 4 cm of each other. This is commonly used for contactless payment systems, transferring contacts, or transferring a file from one device to another. Wi-Fi is the IEEE 802.11 standard for wireless networking based on spread spectrum radio transmission in the 2.4 GHz and 5 GHz bands. The standard has six main iterations (a, b, g, n, ac, and ax), describing different modulation techniques, supported distances, and data rates. A device driver is a small piece of code that is loaded during the boot sequence of an operating system. This code, usually provided by the hardware vendor, provides access to a device, or hardware, from the OS kernel. Under Windows, a signing system is in place for drivers to ensure that they do not make the OS unstable.

Front

You are at the grocery store. At the checkout, you place your smartphone near the payment terminal to authorize the charge. Which technology did you use to make this purchase?

Back

NFC

Answer explanation

NFC (near-field communication) is a set of communication protocols that enable two electronic devices to establish communication by bringing them within an inch or two (3-4 cm) of each other. Most modern smartphones use NFC to provide payment information between a smartphone and an NFC reader at the store. Apple Pay and Google Pay are examples of NFC payment solutions. Zigbee is a low-power wireless communications open-source protocol used primarily for home automation. Zigbee uses radio frequencies in the 2.4 GHz band and a mesh topology. A smart card is a card with a chip containing data on it. Smart cards are typically used for authentication, with the chip storing authentication data such as a digital certificate. A keyboard video mouse (KVM) switch is used to support a single set of input and output devices controlling several PCs. A KVM is more typically used with servers but 2- port versions allow a single keyboard, mouse, and display to be used with two PCs.

Front

What is the BEST way for Natalie to migrate her data from her old iPhone to her new Android device? Options: Natalie should create a wireless Bluetooth connection between the iPhone and the Android devices and use it to copy her contacts and appointments to the new device, Natalie should perform a backup of her iPhone using iTunes on her PC and then import the contacts and appointments from her PC to her new Android device, Natalie should log into her corporate email account on the new Android phone and restore her contacts and appointments to the new device, Natalie should create an NFC connection to transfer all compatible data between the iPhone and the Android devices.

Back

Natalie should log into her corporate email account on the new Android phone and restore her contacts and appointments to the new device.

Answer explanation

Since Natalie has a corporate account used to synchronize data from her device to the cloud, the easier and quickest method would be to fully synchronize her contacts and appointments to her corporate cloud-based account from her old device first. Then, she can configure her new Android device to access her corporate account. It will automatically download and synchronize the data from the cloud-based servers onto her new Android device. Moving data over Bluetooth from an iPhone to an Android can be complicated, so using the cloud synchronization option would be easier and faster. You cannot use iTunes to move data from an iPhone to an Android device since iTunes only supports iPhone and iPad devices. While NFC can transfer data between two phones that are placed close together, it is not the optimal way to transmit large amounts of data such as all of the contacts or appointments from a previous phone.

Front

Which technology secures and manages customer enterprise applications on a user's smartphone or tablet? Options: GSM, MAM, CDMA, MDM

Back

MAM

Answer explanation

Mobile application management (MAM) is software that secures and enables IT administrators to have control over enterprise applications on end users' corporate and personal smartphones and tablets. MAM software allows IT administrators to apply and enforce corporate policies on mobile apps and limit the sharing of corporate data among apps. Mobile device management (MDM) software suites are designed to manage the use of smartphones and tablets within an enterprise. MAMs focus on the application while MDMs focus on the device. The global system for mobile (GSM) communication standard for cellular radio communications and data transfer uses a SIM card to identify the subscriber and network provider. The code division multiple access (CDMA) communication standard for cellular radio communications and data transfer uses a method of multiplexing a communications channel using a code to key the modulation of a particular signal.