Question 1

Which of the following terms provides a data model for the layout of the list?
A) abstraction
B) adapter
C) blueprint
D) skeleton

Accepted Answer

The term "adapter" in the context of lists, particularly in software development (e.g., Android development), refers to a design pattern that acts as a bridge between the UI components and the data source for a list, effectively managing the layout of list items.

Question 2

Displays of lists are rarely used as a design pattern in mobile applications.

Accepted Answer

Displays of lists are commonly used in mobile applications to present information in an organized and easily navigable manner. Common examples include lists of contacts, messages, or items in a shopping cart.

Question 3

Switch statements do not allow ranges such as 10-40 to match a case.

Accepted Answer

Switch statements only allow matching of exact values, not ranges or conditional statements.

Question 4

An adapter provides a data model for the layout of the list.

Accepted Answer

An adapter acts as a bridge between the data model and the layout of the list, providing a way to display the data model's contents within the list's layout.

Question 5

Which ListView control provides a two-level list?
A) DoubleListView
B) MultiListView
C) AdvancedListView
D) ExpandableListView

Accepted Answer

ExpandableListView provides a two-level list where each item in the first level can be expanded to show a list of items in the second level. Therefore, D is the best choice.

Question 6

What is the generic layout to a simple list?
A) simple_list_item_1
B) simple_list_item_2
C) simple_list_item_checked
D) simple_list_item_multiple_choice

Accepted Answer

The generic layout for a simple list is "simple_list_item_1," which is a standard layout provided by Android for displaying a single line of text in a list item.

Question 7

A URL is a URI with additional information necessary for gaining access to the resources required for posting the page.

Accepted Answer

A URL (Uniform Resource Locator) is a specific type of URI (Uniform Resource Identifier) that provides the means to locate a resource on the internet, typically including the protocol, domain, and path, but it does not inherently include additional information for posting a page.

Question 8

Which type of control do you use to contain a list of items that allows a user to select an item in the list for further action?
A) ArrayView
B) TableLayout
C) ListView
D) RadioGroup

Accepted Answer

The ListView is specifically designed to display a list of items and allow the user to select one or more items for further action. It also allows for customization of the layout and appearance of the list. The other options, while they may be used for displaying lists, do not have the same level of built-in functionality for selecting items.

Question 9

The first element in an array is referenced using index 0.

Accepted Answer

Arrays in most programming languages use 0-based indexing, meaning that the first element in the array is referenced using index 0.

Question 10

What method projects your data to the onscreen list by connecting a ListView object to array data?
A) createViewAdapter method
B) projectArrayAdapter method
C) setListAdapter method
D) useListAdapter method

Accepted Answer

The setListAdapter method is used to connect a ListView object to array data and project it onto the screen. The other options do not accurately describe the process of projecting data onto a ListView object.

Question 11

In what is the reference for an array enclosed?
A) {}
B) []
C) ()
D) -

Accepted Answer

In programming, arrays are typically enclosed in square brackets [].

Question 12

An array is a container object that holds a fixed number of values of different data types.

Accepted Answer

An array is a container object that holds a fixed number of values of a single data type, not different data types.

Question 13

To declare an array without assigning actual values, allocate the size of the array in brackets to reserve the room needed in memory.

Accepted Answer

The answer of To declare an array without assigning actual...

Question 14

If the primary purpose of a class is to display a ListView control, which of the following controls is recommended to extend the class from?
A) Activity
B) ListActivity
C) SelectionActivity
D) ViewingActivity

Accepted Answer

ListActivity is a subclass of Activity that comes with built-in functionality for displaying a ListView. It simplifies the process of creating the ListView and handling user interactions with the list. Therefore, extending ListActivity is the best choice for a class whose primary purpose is to display a ListView control.

Question 15

Which variable allows you to store multiple values in one variable at the same time?
A) array variable
B) index variable
C) list variable
D) temporary variable

Accepted Answer

An array variable allows you to store multiple values in one variable at the same time. It is a data structure that can hold a fixed number of elements of the same data type. It is accessed using an index that indicates the position of the element in the array.

Question 16

If a Java View list exceeds the length of the screen, what is done to the list?
A) the list is made scrollable
B) the list is paginated
C) the list is shrunk to fit
D) the list is truncated

Accepted Answer

When a Java View list exceeds the length of the screen, it is made scrollable so that the user can scroll through the list to view all the items.

Question 17

A switch statem ent can also be implemented as a chain of if/else statements.

Accepted Answer

A switch statement can be implemented as a chain of if/else statements, but it may not be as efficient or readable as using a switch statement directly.

Question 18

Each time you add a class to an application, the class should begin with a lowercase letter and a coordinating XML layout file with the same name with an uppercase letter is automatically created.

Accepted Answer

In Java and Android development, the convention is to start class names with an uppercase letter, while XML layout files should be named in lowercase, typically using underscores to separate words. There is no automatic creation of XML files based on class names.

Question 19

It is not necessary to use the break keyword to end a case statement; it is automatically terminated by the next case keyword.

Accepted Answer

The break keyword is necessary to exit a switch case block; without it, execution will fall through to the next case until a break is encountered or the switch statement ends.

Question 20

Which of the following controls allows you to create a two-level list?
A) ExpandableListView control
B) ListView control
C) MajorListView
D) TwoListView control

Accepted Answer

The ExpandableListView control is the only control among the options given that allows for a two-level list. It provides a way to display a list of items and their child items in a hierarchical structure. The other options (ListView, MajorListView, and TwoListView) do not have this capability.

Quiz 5: Investigate Android Lists, Arrays, and Web Browsers

Which of the following terms provides a data model for the layout of the list?

Displays of lists are rarely used as a design pattern in mobile applications.

Switch statements do not allow ranges such as 10-40 to match a case.

An adapter provides a data model for the layout of the list.

Which ListView control provides a two-level list?

What is the generic layout to a simple list?

A URL is a URI with additional information necessary for gaining access to the resources required for posting the page.

Which type of control do you use to contain a list of items that allows a user to select an item in the list for further action?

The first element in an array is referenced using index 0.

What method projects your data to the onscreen list by connecting a ListView object to array data?

In what is the reference for an array enclosed?

An array is a container object that holds a fixed number of values of different data types.

To declare an array without assigning actual values, allocate the size of the array in brackets to reserve the room needed in memory.

If the primary purpose of a class is to display a ListView control, which of the following controls is recommended to extend the class from?

Which variable allows you to store multiple values in one variable at the same time?

If a Java View list exceeds the length of the screen, what is done to the list?

A switch statem ent can also be implemented as a chain of if/else statements.

Each time you add a class to an application, the class should begin with a lowercase letter and a coordinating XML layout file with the same name with an uppercase letter is automatically created.

It is not necessary to use the break keyword to end a case statement; it is automatically terminated by the next case keyword.

Which of the following controls allows you to create a two-level list?