Lesson 19: Using Mobile Devices

What is the purpose of an accelerometer, as fitted in a mobile device? A. It is the software interface for speech recognition. B. It is one of the components that detects how the user is moving the device around. C. It is the component that detects a fingerprint to unlock the screen D. It is a software component that provides faster access to applications.

B. It is one of the components that detects how the user is moving the device around. Along with the gyroscope, it is one of the components that detects how the user is moving the device around. It is used to set the screen orientation and as an advanced control mechanism. All three major vendors now have speech recognition built into their device's operating systems. Examples include Apple's Siri, Google Now, and Microsoft Cortana. Some devices can use biometric authentication via a fingerprint reader to unlock a locked device. Faster access to applications is generally related to the number of open applications and the amount of memory available on the device.

How can a smartphone join a Wi-Fi network if the SSID is not being broadcast? A. Enter the network name manually, as with a computer. B. Use a generic SSID. C. It is not possible. D. Use the Forget Network command to bypass the network.

A. Enter the network name manually, as with a computer. Entering the SSID manually allows you to connect to the network even though it's not being broadcast. The SSID cannot be generic. The Service Set ID is a name that is usually set by the device's vendor and can be up to 32 characters long. Setting the SSID manually is often successfully done on computers and smartphones. The Forget Network command is used to remove a network from the Wi-Fi screen. Sometimes it is necessary to remove a current network before switching to a different network.

What type of gesture is typically used for zooming on a touchscreen? A. Slide B. Pinch C. Tap-and-hold D. Swipe

B. Pinch On modern mobile devices, gestures can be interpreted as events and responded to by software in a particular way. The gesture that is typically used for zooming on a touchscreen is a pinch where you bring your fingers together, which zooms out the view, and move your fingers apart, or stretch, to zoom in. Sliding is a gesture on a mobile device used to move objects around the screen. Tap-and-hold is a gesture on a mobile device used as the equivalent of a right-button mouse click. Swiping is a gesture on a mobile device used to switch between documents or apps. On some devices, software can distinguish between one-, two-, and three-finger swiping.

Which feature allows data to be removed from a device if it is lost or stolen? A. Lockout policy B. Remote wipe C. Screen lock D. Encryption

B. Remote wipe Some phones support a kill switch, or remote wipe, so that if the handset is stolen it can be set back to factory defaults and cleared of personal data. The remote wipe can be triggered by too many attempts at logging in or by software. The lockout policy can be set to lock the device for a certain amount of time, which escalates each time that limit is reached. A basic screen lock can prevent unauthorized access by requiring a password to log in. Encryption is meant to disguise data temporarily, until it can be decrypted, but not to destroy or delete data.

What is the result of putting a phone in "airplane mode?" A. The phone is shut down. B. Wireless features are disabled. C. The volume is muted. D. GPS is connected to the airplane's system.

B. Wireless features are disabled. As a safety feature, most airlines require cell phones to disable wireless features. This mode disables Wi-Fi, Bluetooth, and the GPS (on some devices). The goal is to avoid interference with the airline's communications and navigation systems--especially during take-off and landing. Airplane mode allows phones to stay on, while Wi-Fi is disabled with a quick toggle-like setting. That provides users with opportunities to use the phone's local software for things like playing games, listening to music, or viewing downloaded video. Muting the volume is a courtesy travelers might grant each other, but isn't a function of airplane mode. GPS is one of the wireless radios that is disabled on some devices when using airplane mode.