Question 1

Which of the following statements is false?

Accepted Answer

A)  An app can have many activities, and an Activity can manage multiple Fragments. 
B)  You interact with an Activity through views—GUI components that inherit from class View (package android.view). 
C)  Before Android 3.0, a separate Activity was typically associated with each screen of an app. 
D)  On a tablet, each Fragment typically occupies the entire screen and the Ac-tivity switches between the Fragments, based on user interactions. 
A)  An app can have many activities, and an Activity can manage multiple Fragments. 
B)  You interact with an Activity through views—GUI components that inherit from class View (package android.view). 
C)  Before Android 3.0, a separate Activity was typically associated with each screen of an app. 
D)  On a tablet, each Fragment typically occupies the entire screen and the Ac-tivity switches between the Fragments, based on user interactions. D

Question 2

For apps you submit to the Google Play store, the____________is used as the app's unique identifier.

Accepted Answer

A)  app name 
B)  class name 
C)  package name 
D)  folder name 
A)  app name 
B)  class name 
C)  package name 
D)  folder name C

Question 3

Each app has a theme that defines the default look-and-feel of the standard views you use. The theme is specified in the app’s AndroidManifest.xml file. You can customize aspects of an app’s theme, such those that define an app’s color scheme, by defining style resources in the          file located in the app’s res/values folder.

Accepted Answer

A)  themes.xml 
B)  styles.xml 
C)  colors.xml 
D)  None of the above. 
A)  themes.xml 
B)  styles.xml 
C)  colors.xml 
D)  None of the above. B

Question 4

Which of the next three statements is false?

Accepted Answer

A)  style resources can define common property values that should be applied to multiple views. 
B)  You apply a style resource to a given view by setting its style property. 
C)  Any subsequent changes you make to a style are automatically applied to all views using the style. 
D)  All of the above statements are true. 
A)  style resources can define common property values that should be applied to multiple views. 
B)  You apply a style resource to a given view by setting its style property. 
C)  Any subsequent changes you make to a style are automatically applied to all views using the style. 
D)  All of the above statements are true.

Question 5

The____________method is called whenever the text in the amount-EditText is modified.

Accepted Answer

A)  onNewValue 
B)  onEditTextChanged 
C)  watchedTextChanged 
D)  onTextChanged 
A)  onNewValue 
B)  onEditTextChanged 
C)  watchedTextChanged 
D)  onTextChanged

Question 6

The default layout for an Empty Activity is a____________.

Accepted Answer

A)  GridLayout 
B)  LinearLayout 
C)  RelativeLayout 
D)  None of the above. 
A)  GridLayout 
B)  LinearLayout 
C)  RelativeLayout 
D)  None of the above.

Question 7

Method onCreate typically initializes the Activity's instance variables and views. This method should be as simple as possible so that the app loads quickly. If the app takes longer than five seconds to load, the operating system will display a(n) ____________dialog, giving the user the option to forcibly terminate the app.

Accepted Answer

A)  PNR (Program Not Responding) 
B)  ANR (Application Not Responding) 
C)  ANR (Android Not Responding) 
D)  None of the above. 
A)  PNR (Program Not Responding) 
B)  ANR (Application Not Responding) 
C)  ANR (Android Not Responding) 
D)  None of the above.

Question 8

In the manifest, the activity element’s nested          element determines which Intent types can launch an Activity-.

Accepted Answer

A)  intent 
B)  filter 
C)  intent--filter 
D)  filter-intents 
A)  intent 
B)  filter 
C)  intent--filter 
D)  filter-intents

Question 9

For precise monetary calculations, use class____________(package java.math)-rather than type double-to represent the monetary amounts and perform calculations.

Accepted Answer

A)  MonetaryAmount 
B)  Cash 
C)  BigDecimal 
D)  None of the above. 
A)  MonetaryAmount 
B)  Cash 
C)  BigDecimal 
D)  None of the above.

Question 10

Which of the following statements is false?

Accepted Answer

A)  A theme gives an app a look-and-feel that's consistent with Android. 
B)  Projects that you create for Android 5 and higher use themes that adhere to Google's material- design guidelines. 
C)  There are several predefined material design themes: The "light" theme has a white app bar, a white app background and text that is black or shades of dark gray. 
D)  When designing a GUI, you must choose from the predefined themes. 
A)  A theme gives an app a look-and-feel that's consistent with Android. 
B)  Projects that you create for Android 5 and higher use themes that adhere to Google's material- design guidelines. 
C)  There are several predefined material design themes: The "light" theme has a white app bar, a white app background and text that is black or shades of dark gray. 
D)  When designing a GUI, you must choose from the predefined themes.

Question 11

Java requires that you override every method in an____________ that you implement.

Accepted Answer

A)  struct 
B)  class 
C)  interface 
D)  enumeration 
A)  struct 
B)  class 
C)  interface 
D)  enumeration

Question 12

Which of the following actions does not change the device's configuration?

Accepted Answer

A)  rotating the device 
B)  connecting to a Bluetooth keyboard 
C)  sliding out a hard keyboard 
D)  All of the above change the device's configuration. 
A)  rotating the device 
B)  connecting to a Bluetooth keyboard 
C)  sliding out a hard keyboard 
D)  All of the above change the device's configuration.

Question 13

Android apps have four types of executable components—activities, services, content providers and         .

Accepted Answer

A)  broadcast receivers 
B)  broadcast transmitters 
C)  broadcasters 
D)  receivers 
A)  broadcast receivers 
B)  broadcast transmitters 
C)  broadcasters 
D)  receivers

Question 14

Which of the following statements is false?

Accepted Answer

A)  An active Activity is visible on the screen and "has the focus"-that is, it's in the foreground. You can interact with the Activity currently in the foreground. 
B)  A stopped activity is not visible on the screen-it's in the background and is likely to be killed by the system when its memory is needed. 
C)  An Activity is stopped when another Activity enters the foreground and becomes active. For example, when you answer a phone call, the phone app becomes active and the app you previously were using is stopped. 
D)  Each activity lifecycle method you override must call the subclass's version; otherwise, an exception will occur. 
A)  An active Activity is visible on the screen and "has the focus"-that is, it's in the foreground. You can interact with the Activity currently in the foreground. 
B)  A stopped activity is not visible on the screen-it's in the background and is likely to be killed by the system when its memory is needed. 
C)  An Activity is stopped when another Activity enters the foreground and becomes active. For example, when you answer a phone call, the phone app becomes active and the app you previously were using is stopped. 
D)  Each activity lifecycle method you override must call the subclass's version; otherwise, an exception will occur.

Question 15

You can use the new Android Studio____________to change the app's primary, dark primary and accent colors.

Accepted Answer

A)  Color Editor 
B)  Design Editor 
C)  Layout Editor 
D)  Theme Editor 
A)  Color Editor 
B)  Design Editor 
C)  Layout Editor 
D)  Theme Editor

Question 16

You may configure your AVD (or device) to display the________________keyboard for better contrast in your screen captures.

Accepted Answer

A)  black 
B)  shaded 
C)  dark 
D)  ebony 
A)  black 
B)  shaded 
C)  dark 
D)  ebony

Question 17

Which of the following satements is false?

Accepted Answer

A)  The style.xml resource file contains a style with the name "AppTheme" that's referenced from the app's AndroidManifest.xml file to specify the app's theme. 
B)  A parent theme is similar to a subclass in Java-the new style inherits its parent theme's attributes and their default values. 
C)  Just as in a Java subclass, a style can override parent theme attributes with values customized for specific apps. 
D)  By default, Android Studio sets the parent theme to Theme.AppCompat.Light.DarkActionBar
One of several predefined themes from the AppCompat library-apps that use this theme have a light background, except for the dark app bar at the top of the app. 
A)  The style.xml resource file contains a style with the name "AppTheme" that's referenced from the app's AndroidManifest.xml file to specify the app's theme. 
B)  A parent theme is similar to a subclass in Java-the new style inherits its parent theme's attributes and their default values. 
C)  Just as in a Java subclass, a style can override parent theme attributes with values customized for specific apps. 
D)  By default, Android Studio sets the parent theme to Theme.AppCompat.Light.DarkActionBar
One of several predefined themes from the AppCompat library-apps that use this theme have a light background, except for the dark app bar at the top of the app.

Question 18

Which of the following is false regarding the manifest's activity element?

Accepted Answer

A)  android:name is the app's name. 
B)  android:label is the Activity's name. 
C)  android:screenOrientation specifies the Activity's orientation. 
D)  android:windowSoftInputMode can be used to specify that the soft keypad should be displayed immediately when the app executes and should reappear each time the user returns to the app. 
A)  android:name is the app's name. 
B)  android:label is the Activity's name. 
C)  android:screenOrientation specifies the Activity's orientation. 
D)  android:windowSoftInputMode can be used to specify that the soft keypad should be displayed immediately when the app executes and should reappear each time the user returns to the app.

Question 19

Which of the following statements is false?

Accepted Answer

A)  Class Bundle of package android.os stores key–value pairs of infor-mation—typically representing an app’s state or data that needs to be passed between activities. 
B)  When another app is about to appear on the screen—e.g., when the user re-ceives a phone call or launches another app—Android gives the currently exe-cuting app the opportunity to save its state in a Bundle. The Android runtime might subsequently kill the app—e.g., to reclaim its memory. 
C)  When the app returns to the screen, the Android runtime passes the Bundle of the previously saved state to Activity method onStart. 
D)  We can use Bundles to pass data between activities. 
A)  Class Bundle of package android.os stores key–value pairs of infor-mation—typically representing an app’s state or data that needs to be passed between activities. 
B)  When another app is about to appear on the screen—e.g., when the user re-ceives a phone call or launches another app—Android gives the currently exe-cuting app the opportunity to save its state in a Bundle. The Android runtime might subsequently kill the app—e.g., to reclaim its memory. 
C)  When the app returns to the screen, the Android runtime passes the Bundle of the previously saved state to Activity method onStart. 
D)  We can use Bundles to pass data between activities.

Question 20

Which of the following three statements is true?

Accepted Answer

A)  You arrange a GUI's views in layouts. 
B)  A GridLayout (package android-.widget) arranges views into cells in a rectangular grid. 
C)  Cells in a GridLayout can occupy multiple rows and columns, allowing for complex layouts. 
D)  All of the above statements are true. 
A)  You arrange a GUI's views in layouts. 
B)  A GridLayout (package android-.widget) arranges views into cells in a rectangular grid. 
C)  Cells in a GridLayout can occupy multiple rows and columns, allowing for complex layouts. 
D)  All of the above statements are true.

Which of the following statements is false?

For apps you submit to the Google Play store, the____________is used as the app's unique identifier.

Which of the next three statements is false?

The____________method is called whenever the text in the amount-EditText is modified.

The default layout for an Empty Activity is a____________.

In the manifest, the activity element’s nested element determines which Intent types can launch an Activity-.

For precise monetary calculations, use class____________(package java.math)-rather than type double-to represent the monetary amounts and perform calculations.

Which of the following statements is false?

Java requires that you override every method in an____________ that you implement.

Which of the following actions does not change the device's configuration?

Android apps have four types of executable components—activities, services, content providers and .

Which of the following statements is false?

You can use the new Android Studio____________to change the app's primary, dark primary and accent colors.

You may configure your AVD (or device) to display the________________keyboard for better contrast in your screen captures.

Which of the following satements is false?

Which of the following is false regarding the manifest's activity element?

Which of the following statements is false?

Which of the following three statements is true?

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Exam 3: Tip Calculator App

Which of the following statements is false?

For apps you submit to the Google Play store, the____________is used as the app's unique identifier.

Which of the next three statements is false?

The____________method is called whenever the text in the amount-EditText is modified.

The default layout for an Empty Activity is a____________.

In the manifest, the activity element’s nested element determines which Intent types can launch an Activity-.

For precise monetary calculations, use class____________(package java.math)-rather than type double-to represent the monetary amounts and perform calculations.

Which of the following statements is false?

Java requires that you override every method in an____________ that you implement.

Which of the following actions does not change the device's configuration?

Android apps have four types of executable components—activities, services, content providers and .

Which of the following statements is false?

You can use the new Android Studio____________to change the app's primary, dark primary and accent colors.

You may configure your AVD (or device) to display the________________keyboard for better contrast in your screen captures.

Which of the following satements is false?

Which of the following is false regarding the manifest's activity element?

Which of the following statements is false?

Which of the following three statements is true?

Introduction to Android

Welcome App

Flag Exam App

Doodlz App

Cannon Game App

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