Introduction to Android

Question 1

a) App developers can send data from their servers to their apps installed on Android devices even if the apps are not running currently using ___ .

Answer 1

a) Android C2DM

Question 2

b) ___ is a short-range wireless connectivity standard that allows communication between two devices within a few centimeters.

Answer 2

b) Near-field communication (NFC)

Question 3

c) ___ describe portions of an app’s user interface, which can be combined into one screen or used across multiple screens.

Answer 3

c) Fragments

Question 4

d) With web services, you can create ___ , which enable you to rapidly develop apps by quickly combining complementary web services, often from different organizations and possibly other forms of information feeds.

Answer 4

d) mashups

Question 5

e) Android uses a collection of ___ , which are named groups of related, predefined classes.

Answer 5

e) packages

Question 6

f) The ___ , included in the Android SDK, allows you to run Android apps in a simulated environment within Windows, Mac OS X or Linux.

Answer 6

f) Android emulator

Question 7

g) Almost any noun can be reasonably represented as a software object in terms of ___ (e.g., name, color and size) and behaviors (e.g., calculating, moving and communicating).

Answer 7

g) attributes

Question 8

h) Using NFC ___ allows you to touch two Android devices to share content.

Answer 8

h) Android Beam

Question 9

i) You send messages to an object. Each message is a(n) ___ that tells a method of the object to perform its task.

Answer 9

i) method call

Question 10

a) Android 2.2 introduced external storage, which allows one to store apps on an external memory device.

Answer 10

a) True

Question 11

b) Cloud computing allows one to use software and data stored in the local machines.

Answer 11

b) False. It allows you to use software and data stored in the “cloud”

Question 12

c) Java is neither object-oriented nor has access to extensive class libraries that help you develop powerful apps quickly.

Answer 12

c) False. Java is object-oriented and has access to extensive class libraries

Question 13

d) Attributes are specified by the class’s methods.

Answer 13

d) False. Attributes are specified by the class’s instance variables.

Question 14

e) Objects may communicate with one another, but they’re normally not allowed to know how other objects are implemented—implementation details are hidden within the objects themselves.

Answer 14

e) True.

Question 15

a) Objects have the property of ___ —although objects communicate with one another, they’re normally not allowed to know how other objects are implemented.

Answer 15

a) information hiding.

Question 16

b) The ___ that objects come from are essentially reusable software components; they include attributes and behaviors.

Answer 16

b) classes

Question 17

c) The process of analyzing and designing a system from an object-oriented point of view is called ___ .

Answer 17

c) object-oriented analysis and design (OOAD)

Question 18

d) With ___ ,new classes of objects are derived by absorbing characteristics of existing classes, then adding unique characteristics of their own.

Answer 18

d) inheritance

Question 19

e) The size, shape, color and weight of an object are considered ___ of the object’s class.

Answer 19

e) attributes

Question 20

f) A class that represents a bank account might contain one ___ to deposit money to an account, another to withdraw money from an account and a third to inquire what the account’s current balance is.

Answer 20

f) method

Question 21

g) You must build an object of a class before a program can perform the tasks that the class’s methods define—this process is called ___ .

Answer 21

g) instantiation

Question 22

h) The balance of a bank account class is an example of a(n) ___ of that class.

Answer 22

h) attribute

Question 23

i) Your project’s requirements define what the system is supposed to do and your design specifies ___ the system should do it.

Answer 23

i) how.