Module 1 and 3

Question 1

The mobile operating system is based on _______.

Answer 1

Linux

Question 2

What was the company that originally developed Android?

Answer 2

Android.inc

Question 3

When was Android purchased by Google?

Answer 3

2005

Question 4

What are the different Android Features?

Answer 4

• Database
• Media Files
• WiFi
• Messaging
• Applications
• Touch Screen

Question 5

It is a software stack of components for a mobile device.

Answer 5

Android Architecture

Question 6

The _________ contains a Linux Kernel, collection of C/C++ libraries exposed through an application framework services, runtime and application.

Answer 6

Android Software Stack

Question 7

What are the different parts of the Android Architecture?

Answer 7

In order:
1. Applications
2. Android Framework
3. Android Runtime
4. Platform Libraries
5. Linux Kernel

Question 8

It is the main component to provide OS functions to mobile.

Answer 8

Linux Kernel

Question 9

True or False.
Dalvik Virtual Machine (DVM) is for emulating mobile applications.

Answer 9

False.
(DVM is for RUNNING mobile applications.)

Question 10

These are the essential building blocks of an Android application.

Answer 10

Application Components

Question 11

True or False.
Application components are loosely coupled by the application manifest file, MainActivity.java.

Answer 11

False.
(the main application file, AndroidManifest.xml)

Question 12

This file describes each component and how they interact.

Answer 12

AndroidManifest.xml

Question 13

These dictate UI and user interaction to the phone screen.

Answer 13

Activities

Question 14

These handle background processing associated with an application.

Answer 14

Services

Question 15

These handle communication between Android OS and applications.

Answer 15

Broadcast Receivers

Question 16

These handle data and database management issues.

Answer 16

Content Providers

Question 17

These are portions of user interface in an activity.

Answer 17

Fragments

Question 18

These are UI elements drawn on-screen.

Answer 18

Views

Question 19

These are view hierarchies that control format and appearance of views.

Answer 19

Layouts

Question 20

These are messages wiring components together.

Answer 20

Intents

Question 21

These refer to external elements.

Answer 21

Resources

Question 23

This represents a single screen with a user interface and performs actions on the screen.

Answer 23

Activities

Question 24

True or False.
If an application has more than one activity, one should be marked as the activity that is presented when the application is launched.

Answer 24

True

Question 25

An activity is a subclass of ________ class.

Answer 25

Activity Syntax: public class ActName extends Activity{}

Question 26

It is a component that runs in the background to perform long-running operations.

Answer 26

Services Syntax: public class ServiceName extends Service{}

Question 27

A service is a subclass of _________ class.

Answer 27

Service

Question 28

True or False. Applications or the system cannot initiate broadcasts messages to let other applications know that some data has been downloaded and is available to use.

Answer 28

False. (Applications and the system CAN initiate broadcast messages)

Question 29

The ______________ will intercept communication and initiate appropriate action.

Answer 29

Broadcast Receiver

Question 30

A broadcast receiver is a subclass of ____________ class and each message is broadcasted as an ______ object.

Answer 30

BroadcastReceiver; Intent Syntax: public class ReceiverName extends BroadcastReceiver{public void onReceive(context,intent){}}

Question 31

This allows apps to supply data to others on request.

Answer 31

Content Providers

Question 32

True or False. Requests are handled by ContentResolver class methods. The data may be stored in the file system, database or somewhere else.

Answer 32

True

Question 33

A content provider is a subclass of ________ class and must implement a standard set of APIs for transactions

Answer 33

ContentProvider Syntax: ContProvName extends ContentProvider{public void onCreate(){}}

Question 34

This refers to the additional files and static content under res/.

Answer 34

Android Resources

Question 35

Android resources are accessed using the command, ________.

Answer 35

R.dirName.resourceID

Question 36

This resource directory contains XML files that define Property animations.

Answer 36

animator/ R.animator

Question 37

This resource directory contains XML files that define Tween animations.

Answer 37

anim/ R.anim

Question 38

True or False. Property animations can also be saved in anim/ but animator/ is preferred to distinguish between the two.

Answer 38

True.

Question 39

This resource directory contains XML files that define a state list of colors.

Answer 39

color/ R.color

Question 40

This resource directory contains Bitmap (PNG, JPG, or GIF) or XML files compiled into different subtypes.

Answer 40

drawable/ R.drawable

Question 41

This resource directory contains XML files that define a user interface layout.

Answer 41

layout/ R.layout

Question 42

This resource directory contains XML files that define application menus (Options, Context, or Sub Menu)

Answer 42

menu/ R.menu

Question 43

This resource directory contains arbitrary files to save in their raw form.

Answer 43

raw/

Question 44

True or False. Regarding the raw/ directory, to open with a raw InputStream call, call Resource.openResource() with the resource ID, R.raw.filename

Answer 44

False. (Resource.openRawResources must be called)

Question 45

To access original filenames and file hierarchy, save resources in ______.

Answer 45

assets/

Question 46

True or False. Files in assets/ have a resource ID so you can only read them using AssetManager.

Answer 46

False. (files in assets/ DON'T have a resource ID)

Question 47

This resource directory contains XML files that contain simple values and can describe multiple resources.

Answer 47

values/

Question 48

This resource directory contains Arbitrary XML files read at runtime by calling Resources.getXML().

Answer 48

xml/

Question 49

Various XML configuration files must be saved here in this resource directory.

Answer 49

xml/

Question 50

This resource directory contains Font files (TTF, OTF, or TTC), or XML files with a element.

Answer 50

font/

Question 51

True or False. When your application is compiled, a R class gets generated with resource IDs for all resources in res/.

Answer 51

True

Question 52

True or False. You can use R class to access that resource with sub-directory and resource name (R.dir.ID) or directly resource ID (R.id).

Answer 52

True

Question 53

What is the syntax for accessing resources in XML file?

Answer 53

"@element/resourceID" @string/hello