Question 1

Google now introduces many new Android features via the Android Support Library—a set of libraries that enable you to         .

Accepted Answer

A)  use newer Android features in apps targeting current and past Android plat-forms 
B)  use new Android features only in the current Android platform version 
C)  use old Android features in new Android platforms 
D)  None of the above. 
A)  use newer Android features in apps targeting current and past Android plat-forms 
B)  use new Android features only in the current Android platform version 
C)  use old Android features in new Android platforms 
D)  None of the above.

Question 2

Throughout its life, an Activity can be in one of several states—active (i.e., running),          or stopped.

Accepted Answer

A)  halted 
B)  paused 
C)  ceased 
D)  discontinued 
A)  halted 
B)  paused 
C)  ceased 
D)  discontinued

Question 3

Many of today's Android phones use AMOLED displays. On such displays, a black pixel is turned off and does not consume power. Apps that use mostly black themes can reduce power consumption by approximately_________.

Accepted Answer

A)  10% 
B)  70% 
C)  40% 
D)  90% 
A)  10% 
B)  70% 
C)  40% 
D)  90%

Question 4

By default, the Seekbar allows you to select values from 0 to 100.

Accepted Answer

A)  1 to 100 
B)  1 to 256 
C)  0 to 100 
D)  0 to 256 
A)  1 to 100 
B)  1 to 256 
C)  0 to 100 
D)  0 to 256

Question 5

Class Activity's____________method takes an int constant representing a specific view's ID and returns a reference to the view.

Accepted Answer

A)  findId 
B)  findView 
C)  findViewById 
D)  None of the above. 
A)  findId 
B)  findView 
C)  findViewById 
D)  None of the above.

Question 6

Which of the following statements about class R's nested classes is false?

Accepted Answer

A)  class R.drawable contains constants for any drawable items, such as images, that you put in the various drawable folders in your app's res folder. 
B)  class R.id contains constants for the views in your HTML layout files. 
C)  class R.layout contains constants that represent each layout file in your project (such as, activity_main.xml). 
D)  class R.string contains constants for each String in the strings.xml file. 
A)  class R.drawable contains constants for any drawable items, such as images, that you put in the various drawable folders in your app's res folder. 
B)  class R.id contains constants for the views in your HTML layout files. 
C)  class R.layout contains constants that represent each layout file in your project (such as, activity_main.xml). 
D)  class R.string contains constants for each String in the strings.xml file.

Question 7

Which of the following statements is false?

Accepted Answer

A)  App-Activity is an indirect subclass of Activity that supports using newer Android features apps running on current and older Android platforms. 
B)  You implement interface TextWatcher of package android.text to respond to events when the user changes the text in an EditText. 
C)  You implement interface SeekBar.OnSeekBarChangeListener of package android.widget to respond to the user moving the SeekBar’s thumb. 
D)  Class NumberFormat of package java.text provides numeric formatting ca-pabilities, such as locale-specific currency and percentage formats. 
A)  App-Activity is an indirect subclass of Activity that supports using newer Android features apps running on current and older Android platforms. 
B)  You implement interface TextWatcher of package android.text to respond to events when the user changes the text in an EditText. 
C)  You implement interface SeekBar.OnSeekBarChangeListener of package android.widget to respond to the user moving the SeekBar’s thumb. 
D)  Class NumberFormat of package java.text provides numeric formatting ca-pabilities, such as locale-specific currency and percentage formats.

Question 8

A_____________represents an integer in the range 0-100 by default and allows the user to select a number in that range by moving its thumb.

Accepted Answer

A)  GridLayout 
B)  EditText 
C)  SeekBar 
D)  None of the above 
A)  GridLayout 
B)  EditText 
C)  SeekBar 
D)  None of the above

Question 9

When the virtual keyboard is displayed, the device's back button changes to a down button that enables you to___________.

Accepted Answer

A)  scroll down the screen 
B)  dismiss the app's current activity and return to the prior one. 
C)  hide the app 
D)  dismiss the keyboard 
A)  scroll down the screen 
B)  dismiss the app's current activity and return to the prior one. 
C)  hide the app 
D)  dismiss the keyboard

Question 10

By default, a SeekBar’s range is 0 to 100 and its current value is indicated by its          property.

Accepted Answer

A)  progress 
B)  value 
C)  thumb 
D)  None of the above. 
A)  progress 
B)  value 
C)  thumb 
D)  None of the above.

Question 11

You'll use an anonymous inner class to implement the__________interface (from package android.widget) to respond to the user moving the SeekBar's thumb.

Accepted Answer

A)  SeekBar.OnSeekBarChangeListener 
B)  SeekBar.ChangeListener 
C)  SeekBar.OnChangeListener 
D)  None of the above. 
A)  SeekBar.OnSeekBarChangeListener 
B)  SeekBar.ChangeListener 
C)  SeekBar.OnChangeListener 
D)  None of the above.

Question 12

A(n) ________is a subclass of Text-View that can display text and accept text input from the user.

Accepted Answer

A)  TextBox 
B)  EditText 
C)  TextField 
D)  EditInput 
A)  TextBox 
B)  EditText 
C)  TextField 
D)  EditInput

Question 13

Activities transition between their states in response to various_____________.

Accepted Answer

A)  actions 
B)  steps 
C)  events 
D)  deeds 
A)  actions 
B)  steps 
C)  events 
D)  deeds

Question 14

The call to setContentView receives the R.layout constant indicating the XML file that represents a GUI-e.g., R.layout.activit_main represents the activity_main.xml file. Method setContentView uses this constant to load the corresponding XML document, which Android parses and converts into the app's GUI. This process is known as the____________GUI.

Accepted Answer

A)  creating 
B)  inflating 
C)  fabricating 
D)  building 
A)  creating 
B)  inflating 
C)  fabricating 
D)  building

Question 15

Method____________is called whenever the SeekBar's thumb position changes.

Accepted Answer

A)  onProgressChanged 
B)  onSeekBarChanged 
C)  onThumbPositionChanged 
D)  onValueChanged 
A)  onProgressChanged 
B)  onSeekBarChanged 
C)  onThumbPositionChanged 
D)  onValueChanged

Question 16

Which of the following statements is false?

Accepted Answer

A)  If you need to customize theme colors, Google’s material design guidelines for color recommend that you choose a color palette consisting of a primary color—with no more than five hues (shades)—and an accent color. 
B)  The primary colors typically are used to color the status bar and the app bar at the top of the screen and also can be used in your GUI. 
C)  The accent color is used to tint various views in your GUI, such as SeekBars, CheckBoxes and RadioButtons. 
D)  Once you choose a palette, you can use Android Studio’s Theme Editor to modify a theme’s colors. 
A)  If you need to customize theme colors, Google’s material design guidelines for color recommend that you choose a color palette consisting of a primary color—with no more than five hues (shades)—and an accent color. 
B)  The primary colors typically are used to color the status bar and the app bar at the top of the screen and also can be used in your GUI. 
C)  The accent color is used to tint various views in your GUI, such as SeekBars, CheckBoxes and RadioButtons. 
D)  Once you choose a palette, you can use Android Studio’s Theme Editor to modify a theme’s colors.

Question 17

When you set a view's___________property, Android automatically casts a shadow for that view.

Accepted Answer

A)  shadow 
B)  elevation 
C)  altitude 
D)  levitation 
A)  shadow 
B)  elevation 
C)  altitude 
D)  levitation

Question 18

The manifest element’s nested          element specifies attributes of the application.

Accepted Answer

A)  activity 
B)  application 
C)  app 
D)  None of the above. 
A)  activity 
B)  application 
C)  app 
D)  None of the above.

Question 19

Which of the following statements is false?

Accepted Answer

A)  If an Intent matches only one Activity's intent-filter, Android executes that Activity. 
B)  If there are multiple matches, Android presents a list from which the user can choose an app, then executes the appropriate Activity in that app. 
C)  An Intent often contains data the Activity can use to perform its task. 
D)  The intent-filter element optionally can contain one or more action elements. 
A)  If an Intent matches only one Activity's intent-filter, Android executes that Activity. 
B)  If there are multiple matches, Android presents a list from which the user can choose an app, then executes the appropriate Activity in that app. 
C)  An Intent often contains data the Activity can use to perform its task. 
D)  The intent-filter element optionally can contain one or more action elements.

Question 20

Why would you set the digits property of an EditText to 0123456789?

Accepted Answer

A)  To allow only characters other than the digits 0-9 to be entered. 
B)  To allow only the string of digits 0123456789 to be entered. 
C)  To allow only digits to be entered (in any order and combination). 
D)  None of the above. 
A)  To allow only characters other than the digits 0-9 to be entered. 
B)  To allow only the string of digits 0123456789 to be entered. 
C)  To allow only digits to be entered (in any order and combination). 
D)  None of the above.

Google now introduces many new Android features via the Android Support Library—a set of libraries that enable you to .

Throughout its life, an Activity can be in one of several states—active (i.e., running), or stopped.

Many of today's Android phones use AMOLED displays. On such displays, a black pixel is turned off and does not consume power. Apps that use mostly black themes can reduce power consumption by approximately_________.

By default, the Seekbar allows you to select values from 0 to 100.

Class Activity's____________method takes an int constant representing a specific view's ID and returns a reference to the view.

Which of the following statements about class R's nested classes is false?

Which of the following statements is false?

A_____________represents an integer in the range 0-100 by default and allows the user to select a number in that range by moving its thumb.

When the virtual keyboard is displayed, the device's back button changes to a down button that enables you to___________.

By default, a SeekBar’s range is 0 to 100 and its current value is indicated by its property.

You'll use an anonymous inner class to implement the__________interface (from package android.widget) to respond to the user moving the SeekBar's thumb.

A(n) ________is a subclass of Text-View that can display text and accept text input from the user.

Activities transition between their states in response to various_____________.

Method____________is called whenever the SeekBar's thumb position changes.

Which of the following statements is false?

When you set a view's___________property, Android automatically casts a shadow for that view.

The manifest element’s nested element specifies attributes of the application.

Which of the following statements is false?

Why would you set the digits property of an EditText to 0123456789?

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Google now introduces many new Android features via the Android Support Library—a set of libraries that enable you to .

Throughout its life, an Activity can be in one of several states—active (i.e., running), or stopped.

Many of today's Android phones use AMOLED displays. On such displays, a black pixel is turned off and does not consume power. Apps that use mostly black themes can reduce power consumption by approximately_________.

By default, the Seekbar allows you to select values from 0 to 100.

Class Activity's____________method takes an int constant representing a specific view's ID and returns a reference to the view.

Which of the following statements about class R's nested classes is false?

Which of the following statements is false?

A_____________represents an integer in the range 0-100 by default and allows the user to select a number in that range by moving its thumb.

When the virtual keyboard is displayed, the device's back button changes to a down button that enables you to___________.

By default, a SeekBar’s range is 0 to 100 and its current value is indicated by its property.

You'll use an anonymous inner class to implement the__________interface (from package android.widget) to respond to the user moving the SeekBar's thumb.

A(n) ________is a subclass of Text-View that can display text and accept text input from the user.

Activities transition between their states in response to various_____________.

Method____________is called whenever the SeekBar's thumb position changes.

Which of the following statements is false?

When you set a view's___________property, Android automatically casts a shadow for that view.

The manifest element’s nested element specifies attributes of the application.

Which of the following statements is false?

Why would you set the digits property of an EditText to 0123456789?

Introduction to Android

Welcome App

Flag Exam App

Doodlz App

Cannon Game App

Filters