IT Essentials (ITE v6.0 + v7.0) Chapter 12 Test Online

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In addition to GPS, mobile device locator apps can use cellular towers and WiFi hotspots to determine the position of a mobile device. The device sandbox, remote lock, or an app source (Play Store or iTunes) are other features and functions related to security and app downloading.

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Apple iOS devices have a physical Home button that has many uses. One of the uses of the Home button is navigation between screens. Android uses navigation icons instead of a physical Home button. In addition, much like a Windows OS, apps in Android are represented by icons that are shortcuts to the actual app. In iOS, the icons are the apps. Deleting an icon in Android deletes only the shortcut. However, the entire app is deleted from an iOS device when its icon is deleted.

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The passcode lock feature on mobile devices helps prevent theft of private information and places the device into a power saving state. Personal data will not usually be erased from some mobile devices unless the number of failed passcode login attempts exceeds a threshold. Remote lock allows the device to be locked from a remote location. A factory reset returns the device to the original operation state when the device was first purchased. Various applications such as email or cloud storage can provide synchronization capabilities to be able to restore and re-synchronize information such as user data, contacts, and email on a mobile device.y other device features and actions.

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The highlighted area shows the Android operating system navigation icons. From left to right they are Back, Home, and Recent Apps.

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Mobile operating systems are usually protected by a number of software restrictions. Rooting and jailbreaking are two methods for removing restrictions and protections added to mobile operating systems. They are a means of circumventing the usual operation of the device operating system to gain superuser or root administrator permissions.

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The mkdir command is used to create the new directory and the cp command is used to copy files from one directory to another.

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Read, write, and execute permissions are assigned to each file. The permissions are listed in groups of three. The first group of three permissions references users, the second references group members, and the third references others. The first position of each of the three permissions is the R or read permission, the second is the W or write permission, and the third is the X or execute permission. If any position has a dash, the associated group does not have permission for that category. In this case, the user hasread and write access (rw-). Group members haveread and execute access (r-x). Other people haveexecute only access (–x).

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Google Play ensures that the app is compatible with the mobile device and is a trusted source for apps.

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The Windows Phone OS uses tiles to represent apps. Tiles are rectangles that can display active content. When tapped, they open the associated app. Tiles can be resized to unclutter screens and to reflect the relative importance of the app.

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After a factor reset, a mobile device is left in the same state that it was when it left the factory. The operating system software would not be altered but all user data, settings, and third party applications would be deleted. Backups should be done prior to a factory reset. Updates or patches to the operating system could be done before or after the factory reset.

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Siri is the well-known digital, or virtual, assistant that is available in iOS. Windows Phone also has a digitial assistant. It is called Cortana.

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Wi-Fi calling is a way that a mobile phone can use a wireless data network to make phone calls as if it were connected to a cellular network. In cases where cell phone coverage is inadequate, calls can be placed from places that have open Wi-Fi networks.

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Antivirus and antimalware software compare the contents of a disk with sample virus and malware code included in signature files. If a comparison is found, the user can be notified and the virus can be isolated or removed.

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Many devices have multiple operating systems installed in different partitions. When a device boots, the boot manager asks the user to select the OS to use. The boot manager then directs the BIOS to the correct partition so that the device can continue to boot by using the selected OS.

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Netboot is a built-in tool on the Mac OS that allows for remotely booting the computers. Finder is similar to the Windows File Explorer tool and is used to navigate the Mac OS file system. MSTSC is used to open the Windows Remote Desktop utility. Time Machine is an automatic backup utility built into the Mac OS.

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Finder is similar to the Windows File Explorer tool and is used to navigate the Mac OS file system. The mstsc command is used to open the Windows Remote Desktop utility. The Task Manager tool on Windows allows a user to view all running applications.

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Apple uses a walled garden model for the iOS apps. The apps must be submitted to and approved by Apple before they are released to users.

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Android apps run in a sandbox and have only the privileges enabled by the user. If an app needs to obtain permissions, a prompt will appear and the user can grant permissions through settings.

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The Back icon, if pressed, returns to the previous screen.

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On the iOS interface, each app on screen is the actual app, not a shortcut.

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The LCD screen for most mobile devices uses the most battery power. Lowering the brightness or using the auto-brightness feature helps conserve battery power.

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Apple uses a technology known as Touch ID in which the user sets up a template fingerprint scan that is converted into a unique hash and stored within a secure cache on the iOS device. The hash is used to authenticate with the user.

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Data on mobile devices must be backed up periodically to ensure that it can be recovered if needed. Most mobile operating systems come with a user account linked to the cloud services of the vendor, such as iClould for iOS, Google Sync for Android, and OneDrive for Microsoft.

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In addition to mobile operating system updates, there are two other types of updates for mobile device radio firmware. They are called baseband updates and consist of the Preferred Roaming List (PRL) and the Primary Rate ISDN (PRI). The PRL is configuration information that a cellular phone needs to communicate on networks other than the carrier network. The PRI configures the data rates between the device and the cell tower. This ensures that the device is able to communicate with the tower at the correct rate.

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When a driver in a Linux system has been corrupted or a piece of hardware is failing, the system will freeze on startup and exhibits kernel panic where there is a stop screen.

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The vim command is used to open a text editor; ls displays files within a directory; grep searches for strings of characters within a file; and ifconfig displays information about the network interface card.

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The ext3 file system is considered a journaled file system that was designed to improve the existing ext2 file system. A journal, the main feature added to ext3, is a technique used to minimize the risk of file system corruption in the event of sudden power loss.

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To use Force Quit, right-click on the application icon that is not responding from the Dock and close the application.

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To use Force Quit, right-click on the application icon that is not responding from the Dock and close the application.