Question 1

If multiple activities can handle the action and data passed to startActivity, the system will ________.
A) display a dialog in which the user can select the activity to use
B) choose the first matching Activity
C) select a random Activity
D) None of the above

Accepted Answer

If multiple activities can handle the action and data passed to startActivity, the system will display a dialog in which the user can select the activity to use. This allows the user to choose the appropriate activity based on their preferences.

Question 2

An Activity is launched by using a(n) ________ that indicates an action to be performed and the data on which to perform that action.
A) Action 
B) IntendedAction 
C) Launcher 
D) Intent

Accepted Answer

An Intent is used to launch an Activity in Android. It indicates the action to be performed and the data on which to perform that action.

Question 3

Which of the next three statements is false?
A) When exceptions occur or when you want to track important aspects of your code’s execution, you can log messages for debugging purposes with Android’s built-in logging mechanism. 
B) Android provides class Log (package android.util) with several static methods that represent messages of varying detail. 
C) Logged messages can be viewed in the bottom of the Android Device Moni-tor’s LogCat tab or with the Android logcat tool. 
D) Each of the above statements is true.

Accepted Answer

All the statements (A, B, and C) are true regarding Android's logging mechanism, making statement D correct as it states that each of the above statements is true.

Question 4

If the system cannot find an activity to handle an Intent’s action, then method startActivity throws an Activity-NotFound-Exception. You can prevent this exception from happening by first using Intent method ________ to de-termine whether there is an Activity to handle the Intent. 
A) findActivity 
B) findActivityForIntent
C) resolveActivity
D) resolveActivityForIntent

Accepted Answer

The correct method to determine whether there is an Activity to handle the Intent is resolveActivity. This method returns the first activity component that can handle the intent or null if no such component can be found, thus preventing the Activity-NotFound-Exception from being thrown.

Question 5

When a color state list resource is provided for a Button color (either fore-ground or background), the appropriate color from the list of colors is selected, based on the Button’s ________. 
A) relative horizontal position
B) importance
C) proximity to other GUI elements
D) state

Accepted Answer

A color state list resource is used for changing the color of a button based on its state (such as pressed, focused, or disabled). Therefore, the appropriate color from the list of colors is selected based on the button's state.

Question 6

Select File > New > Vector Asset to display the ________—this tool enables you to add to your project any of Google’s recommended material design icons. Each icon is defined as a scalable vector graphic that smoothly scales to any size.
A) Vector Image Studio
B) Vector Asset Studio
C) Asset Studio
D) Image Studio

Accepted Answer

The description in the question specifically mentions "Vector Asset Studio" as the tool that enables adding Google's material design icons as scalable vector graphics to a project. The other options (Vector Image Studio, Asset Studio, Image Studio) are not mentioned as options for this task.

Question 7

A(n) ________ is a collection of animations that make up a larger animation.
A) animation list
B) animation set
C) animation map
D) None of the above

Accepted Answer

An animation set is a collection of animations that make up a larger animation. It is a commonly used term in animation software and programming. Option A (animation list) and Option C (animation map) are not standard terms used to describe a collection of animations. Option D (none of the above) is not specific enough.

Question 8

Which of the following three statements is false?
A) The Blank Activity template is a backward-compatible app template (for An-droid 2.1 and higher) that uses features of the Android Design Support Library. 
B) The Blank Activity template must be used with a Fragment. 
C) When you choose to use the Fragment option, the IDE creates layouts named activity_main.xml, content_main.xml and fragment_main.xml.
D) Each of the above statements are false

Accepted Answer

The Blank Activity template does not require the use of a Fragment. It can be used with or without Fragments.

Question 9

As with any other resource, color resources should be defined in XML so you can easily change colors without modifying your app's Java source code and so you can use Android's ________ capabilities to provide colors resources for various scenarios (different locales, night and day colors, and so on).
A) color-choosing
B) value-choosing
C) locale-choosing
D) resource-choosing

Accepted Answer

Defining color resources in XML allows for easy modification through Android's resource-choosing capabilities, which includes support for different locales, night and day colors, and other scenarios.

Question 10

Which of the following three statements is false?
A) You must create the AndroidManifest.xml file when you create an app. 
B) All activities in an Android app must be listed in the app’s manifest file. 
C) When you add an activity to a project, the IDE will also add it to the mani-fest file. 
D) All of the above statements are false.

Accepted Answer

The answer of Which of the following three statements is...

Question 11

You can force a menu item to display on the app bar, in which case it's known as a(n) ________-by default, this is displayed as the menu item's icon (if there is one).
A) task
B) button
C) action
D) None of the above

Accepted Answer

A menu item displayed on the app bar is known as an action. By default, it is displayed as the menu item's icon.

Question 12

The Android design guidelines indicate that text displayed in your GUI should be brief, simple and friendly with the important words ________.
A) centered
B) last
C) in italics
D) first

Accepted Answer

The important words should be placed first in the text displayed in GUI according to Android design guidelines, which helps in quickly conveying the message to the user.

Question 13

When you choose the Blank Activity template's Fragment option, this file contains only a ________ element that displays the MainActivityFragment's GUI defined in fragment_main.xml. A) B) C) D) None of the above

Accepted Answer

The answer of When you choose the Blank Activity template's...

Question 14

By convention array resources are normally defined in arrays.xml, colors in colors.xml, Strings in strings.xml and numeric values in ________.
A) numbers.xml
B) numeric.xml
C) digits.xml
D) values.xml

Accepted Answer

The convention for defining numeric values is to use values.xml as it is a general file for declaring various types of values.

Question 15

Which of the following statements is true?
A) The default activity_main.xml layout embeds (via an <include> element in the XML) the GUI defined in content_main.xml. 
B) The default activity_main.xml layout also contains a FloatingAc-tionButton—a round image button from the Android Design Support Library that has a higher elevation than the GUI’s other components, so it “floats” over the GUI. 
C) Each app based on the Blank Activity template includes a FloatingAc-tionButton (which typically emphasizes an important action that the user can perform by touching the button) and other material design features. 
D) All of the above statements are true.

Accepted Answer

All the statements provided are true regarding the default configurations and components included in the Android Blank Activity template, including the use of an <include> tag in the activity_main.xml for embedding content from another layout file, the presence of a FloatingActionButton, and the inclusion of material design features in apps based on the Blank Activity template.

Question 16

If the Java compiler can infer a generic object's type from the context, you can replace with <> when creating the object. In this context, <> is referred to as the ________ operator. A) type B) less than-greater than C) inference D) diamond

Accepted Answer

The answer of If the Java compiler can infer a...

Question 17

Each Activity declared in the AndroidManifest.xml file can specify ________ indicating actions the Activity is capable of handling. 
A) intent extractors
B) activity filters
C) intent filters
D) None of the above

Accepted Answer

Activities declared in the AndroidManifest.xml file can specify intent filters indicating actions the Activity is capable of handling.

Question 18

Which of the following statements about a standard AlertDialog is false?
A) Its negative action button cancels the dialog’s specified action, often labeled with CANCEL- or NO. This is the leftmost button when there are multiple but-tons in the dialog.
B) Its positive action button accepts the dialog’s specified action, often labeled with OK or YES. This is the rightmost button when there are multiple buttons in the dialog.
C) Its neutral action button indicates that the user does not want to cancel or accept the action specified by the dialog. For example, an app that asks the user to register to gain access to additional features might provide a REMIND ME LATER neutral button. 
D) Each of the above statements is true.

Accepted Answer

Each of the statements about a standard AlertDialog is true.

Question 19

You can use Collections method ________ to randomize the order of the elements in an ArrayList<String>.
A) reorder
B) shuffle
C) srand
D) randomize

Accepted Answer

The shuffle method in the Collections class is used to randomly shuffle the elements in a list. It takes a list as a parameter and shuffles the elements in place. This method is ideal for randomizing the order of elements in an ArrayList. Option A is not a valid method in the Collections class, option C is not in java.util but in cstdlib, and option D is not a valid method in the Collections class.

Question 20

Android uses a technique known as ________ to communicate information between activities within one app or activities in separate apps. 
A) intent messaging
B) intent dispatching
C) intent broadcasting
D) None of the above

Accepted Answer

Intent messaging is used in Android to communicate information between activities within one app or between activities in different apps. It allows different components of an app to send and receive messages in a loosely-coupled manner, which helps to decouple components and make them more modular. Intent messaging can also be used to start activities, services, or broadcast receivers, and to pass data along with these actions. Therefore, option A is the correct choice.

Quiz 4: Flag Quiz App

If multiple activities can handle the action and data passed to startActivity, the system will ________.

An Activity is launched by using a(n) ________ that indicates an action to be performed and the data on which to perform that action.

Which of the next three statements is false?

If the system cannot find an activity to handle an Intent’s action, then method startActivity throws an Activity-NotFound-Exception. You can prevent this exception from happening by first using Intent method ________ to de-termine whether there is an Activity to handle the Intent.

When a color state list resource is provided for a Button color (either fore-ground or background) , the appropriate color from the list of colors is selected, based on the Button’s ________.

Select File > New > Vector Asset to display the ________—this tool enables you to add to your project any of Google’s recommended material design icons. Each icon is defined as a scalable vector graphic that smoothly scales to any size.

A(n) ________ is a collection of animations that make up a larger animation.

Which of the following three statements is false?

Which of the following three statements is false?

You can force a menu item to display on the app bar, in which case it's known as a(n) ________-by default, this is displayed as the menu item's icon (if there is one) .

The Android design guidelines indicate that text displayed in your GUI should be brief, simple and friendly with the important words ________.

When you choose the Blank Activity template's Fragment option, this file contains only a ________ element that displays the MainActivityFragment's GUI defined in fragment_main.xml.

By convention array resources are normally defined in arrays.xml, colors in colors.xml, Strings in strings.xml and numeric values in ________.

Which of the following statements is true?

If the Java compiler can infer a generic object's type from the context, you can replace <type> with <> when creating the object. In this context, <> is referred to as the ________ operator.

Each Activity declared in the AndroidManifest.xml file can specify ________ indicating actions the Activity is capable of handling.

Which of the following statements about a standard AlertDialog is false?

You can use Collections method ________ to randomize the order of the elements in an ArrayList<String>.

Android uses a technique known as ________ to communicate information between activities within one app or activities in separate apps.