Question 1

____ is the Java class that can be used to format numbers for display.
A) DecimalFormat
B) DollarFormat
C) NumericFormat
D) StringFormat

Accepted Answer

DecimalFormat is the Java class that can be used to format numbers for display. It allows for customized formatting such as adding commas, specifying decimal places, and using currency symbols. The other answer choices (B, C, and D) are not valid Java classes for formatting numbers.

Question 2

When you select the ____________________ Text Field, Android deactivates the letters on the keyboard.

Accepted Answer

The answer of When you select the ____________________ Text Field,...

Question 3

The method to get the selected item from a Spinner control is ____.
A) getItem()
B) getSelectedItem()
C) getText()
D) selectedItem()

Accepted Answer

The method getSelectedItem() is used to retrieve the currently selected item from a Spinner control.

Question 4

Due to user error, it is often easier to input from a finite set of options using a(n) ____.
A) Button
B) EditText
C) Number TextView
D) Spinner

Accepted Answer

A Spinner is designed to display a dropdown list of options and allows the user to select only one value from that list. This makes it less prone to user error as they are limited to the predetermined set of options. Buttons and EditTexts are not specifically designed for selecting from a finite set of options while Number TextViews are designed for displaying numbers and not for selecting from a list of options.

Question 5

A(n) ____________________ is a style applied to an Activity or an entire application.

Accepted Answer

The answer of A(n) ____________________ is a style applied to...

Question 6

A String can be a single ____ .
A) character
B) digit
C) space
D) truth value

Accepted Answer

A string can be a single character, such as 'a' or 'Z'. A string cannot be a single digit or truth value, and while it can contain spaces, a single space alone is not a string.

Question 7

The operator with the highest order of precedence is ____.
A) ()
B) ++
C) %
D) -

Accepted Answer

Parentheses have the highest order of precedence in most programming languages, including C++.

Question 8

Variables that have not been used in a program have a ____.
A) curly underline
B) green dashed line
C) red squiggly line
D) yellow highlight

Accepted Answer

In most programming environments, a curly underline indicates a warning or error that a variable has been declared but not used in the program.

Question 9

Which data type is not a numeric primitive?
A) byte
B) char
C) int
D) short

Accepted Answer

Char is not a numeric primitive, but instead represents a single character in the Unicode character set.

Question 10

To display text in a TextView control, use the method ____.
A) assignText()
B) displayText()
C) setText()
D) showText()

Accepted Answer

The correct method to display text in a TextView control is setText(). This method takes a String parameter and sets the text of the TextView to the specified value. The other options (assignText(), displayText(), showText()) do not exist as standard methods in Android and will result in a compilation error.

Question 11

____________________ are multitouch interactions such as pressing two fingers to pan, rotate, or zoom.

Accepted Answer

The answer of ____________________ are multitouch interactions such as pressing...

Question 12

A(n) ____ can be used to display instructions at the top of Spinner controls.
A) abstract
B) hint
C) lead-in
D) prompt

Accepted Answer

A "prompt" is used to display instructions or a message at the top of Spinner controls in Android development.

Question 13

To assign a phrase as the value of a String variable, place the text in ____.
A) brackets
B) double quotation marks
C) parentheses
D) single quotation marks

Accepted Answer

In Java, string literals should always be enclosed in double quotation marks to tell the compiler where the string starts and ends.

Question 14

The set of resources available to an app is referenced by ____.
A) res
B) R
C) S
D) V

Accepted Answer

In Android development, the set of resources available to an app is referenced by the 'R' class, which is automatically generated and contains references to all resources in the 'res' directory.

Question 15

You have a variable that will only assume values between 0 and 100. The most compact primitive type to use is a(n) ____.
A) byte
B) float
C) int
D) long

Accepted Answer

A byte can store values from -128 to 127, which is sufficient for values between 0 and 100.

Question 16

A ____ variable can only be initialized once.
A) final
B) local
C) static
D) temporary

Accepted Answer

A final variable can only be initialized once and cannot be modified later, making it a constant value.

Question 17

Android loads text resources from the project's ____________________ table.

Accepted Answer

The answer of Android loads text resources from the project's...

Question 18

There are ____ primitive data types in Java.
A) three
B) five
C) eight
D) twelve

Accepted Answer

Java has eight primitive data types: byte, short, int, long, float, double, char, and boolean.

Question 19

After declaring a variable you must ____ before you use it.
A) assign it a value
B) check its data type
C) display it
D) store it in the manifest

Accepted Answer

After declaring a variable, it is important to assign it a value before using it in order to avoid errors or unexpected results.

Question 20

The code necessary to display the light holographic theme is as follows: _______________________________________________________.

Accepted Answer

The answer of The code necessary to display the light...

Quiz 3: Engage Android User Input, Variables, Operations

____ is the Java class that can be used to format numbers for display.

When you select the ____________________ Text Field, Android deactivates the letters on the keyboard.

The method to get the selected item from a Spinner control is ____.

Due to user error, it is often easier to input from a finite set of options using a(n) ____.

A(n) ____________________ is a style applied to an Activity or an entire application.

A String can be a single ____ .

The operator with the highest order of precedence is ____.

Variables that have not been used in a program have a ____.

Which data type is not a numeric primitive?

To display text in a TextView control, use the method ____.

____________________ are multitouch interactions such as pressing two fingers to pan, rotate, or zoom.

A(n) ____ can be used to display instructions at the top of Spinner controls.

To assign a phrase as the value of a String variable, place the text in ____.

The set of resources available to an app is referenced by ____.

You have a variable that will only assume values between 0 and 100. The most compact primitive type to use is a(n) ____.

A ____ variable can only be initialized once.

Android loads text resources from the project's ____________________ table.

There are ____ primitive data types in Java.

After declaring a variable you must ____ before you use it.

The code necessary to display the light holographic theme is as follows: _______________________________________________________.