Chapter 10

Question 1

Pointer events are supported only by certain versions of which browser?

Answer 1

​Microsoft Internet Explorer

Question 2

The object returned by the getCurrentPosition() method of the Geolocation API contains a single property named ____.

Answer 2

coords

Question 3

Which of the following is NOT removed when minifying a file?​

Answer 3

spaces

Question 4

To request a user’s position a single time, you use the ____ method of the Geolocation API.​

Answer 4

​getCurrentPosition()

Question 5

A device’s ____ detects changes in speed.​

Answer 5

​accelerometer

Question 6

You access methods of the Geolocation API using the geolocation property of the ____ object.​

Answer 6

Navigator

Question 7

To disable interface gestures in response to pointer events, you change the value off the ____ property.​

Answer 7

​msTouchAction

Question 8

​Which of the following is a touch event?

Answer 8

touchend

Question 9

The success and fail arguments of the getCurrentPosition() method, which are executable code, are examples of ____.​

Answer 9

callbacks

Question 10

​Devices that allow for multiple touches on the screen at the same time

Answer 10

multitouch

Question 11

​Provides user’s latitude and longitude coordinates

Answer 11

​Geolocation API

Question 12

A specification created by Microsoft for Windows Phone and Windows 8

Answer 12

​pointer events

Question 13

​Reports charge level of device battery

Answer 13

​Battery Status API

Question 14

​Provides access to device orientation and changes in orientation

Answer 14

​Device Orientation API

Question 15

​A set of events created by Apple for iOS

Answer 15

​touch events

Question 16

​Provides access to device camera, microphone, and/or screen

Answer 16

​WebRTC API

Question 17

​A browser or device interaction performed using touch, such as for scrolling the page

Answer 17

gesture

Question 18

​A pointing device that looks like a pencil and allows for precise touch input on a touchscreen

Answer 18

stylus

Question 19

​An argument that contains or references executable code

Answer 19

callback

Question 20

​Which of the following is a pointer event?

Answer 20

pointerdown

Question 21

To continually monitor a user’s position, you use the ____ method of the Geolocation API.​

Answer 21

​watchPosition()

Question 22

Which type of events focus on responding to finger touches on a touchscreen?​

Answer 22

​Touch events

Question 23

​The touchstart event is roughly analogous to the ____ event.

Answer 23

mousedown

Question 24

In the Google Maps API, you specify coordinates with the ____ constructor.​

Answer 24

​LatLng()

Question 25

Which array contains coordinates of all touches currently on the screen?​

Answer 25

​touches

Question 26

A device’s ____ detects its orientation in space.​

Answer 26

gyroscope

Question 27

In the Google Maps API, the ____ constructor creates a map object.​

Answer 27

​Map()

Question 28

​Which of the following is a mouse event?

Answer 28

click

Question 29

Which type of events aim to handle input from a mouse, finger, or stylus with each event?​

Answer 29

​Pointer events

Question 30

Which event is fired when a user moves a finger off the screen or outside of an object’s containing element?​

Answer 30

​touchcancel