Ch 21 BB

Question 1

What operating system is android based on? Pg 1007

Answer 1

Linux.

Question 2

Until 2010, what market was the Windows Phone mainly aimed at? Pg 1013

Answer 2

Corporate users,

Question 3

Which mobile operating systems are open source, and which are closed source? Pg 1013

Answer 3

Open: Android
Closed: iOS, Windows Phone

Question 4

Google Play is a combination of which two services? Pg 1014

Answer 4

Android Market and Google Music.

Question 5

T/F Both Google and Apple approve apps before allowing them to be released on their respective app markets. Pg 1014

Answer 5

False. Google does not approve apps and relies on users to give negative reviews if an app does not work properly.

Question 6

What is gesture-based interaction relative to touchscreens? Pg 1022

Answer 6

Users use their fingers and various movements to interact with the touchscreen.

Question 7

What are the three gestures most mobile OSs can understand? Pg 1022-23

Answer 7

Tap (similar to clicking on a mouse), Swipe (scroll), Pinch (zoom).

Question 8

What is kinetics and how do mobile devices employ this concept? Pg 1023

Answer 8

Refers to the sense of motion. Mobile devices have a multitude of kinetic sensors built in. For example, the iPhone 6 has a gyroscope, accelerometer, linear acceleration sensor, magnetometer, altitude sensor, and gravity sensor.

Question 9

Which kinetic sensors control which screen orientations? Pg 1023-24

Answer 9

Accelerometer: forward/backward (x axis), left/right (y axis), up/down (z axis)
Gyroscope: roll (rotation centered on the y-axis), pitch (rotation on the x-axis), yaw (rotation on the z-axis)

Question 10

What sensors help in calculating geolocation and how do they work? Pg 1024

Answer 10

Magnetometer (detects magnetic north) and global position system (uses three satellites to triangulate latitude/longitude)

Question 11

What are some things that would interfere with the geolocational system of the phone? What are some possible work arounds? Pg 1025

Answer 11

Magnetic interference can interfere with the magnetometer, but the GPS system can determine heading while in motion. If satellites are not available, the GPS can lose accuracy or altogether stop functioning. Some devices come with the ability to use wi-fi to determine geolocation.

Question 12

What is Geotracking? What is Geotagging? Pg 1025

Answer 12

Geotracking is storing your location over a period of time which tracks your movement. Geotagging is recording a location to tag on your photos/videos/social media posts.