Deck 3: Engage Android User Input, Variables, and Operations

Question 1

By requesting input, an app can guarantee that every user experience is the same every time the app is used.

Answer 1

False

Question 2

A physical keyboard on a smartphone is also called a ____.

A) button board
C) strict keyboard
B) hard keyboard
D) tactile keyboard

Answer 2

B

Question 3

Plus (+) and minus (-) have the highest order of precedence in the order of operations.

Answer 3

False

Question 4

An application with an appealing graphical design is preferred over applications that are textual in nature.

Question 5

Heavy use of text and low use of graphics engages the user.

Question 6

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

A) res
C) S
B) R
D) V

Question 7

The String type is a class, not a primitive data type.

Question 8

Good programming practice dictates that variable names should reflect the values placed in the variables.

Question 9

The on-screen keyboard is also called a(n) ____.

A) electric keyboard
C) soft keyboard
B) screenboard
D) touch keyboard

Question 10

The ____ TextView can suggest completion of a word after the first few letters.

A) AutoComplete
C) Person Name
B) Date
D) Plain Text

Question 11

A(n) ____ is used in a Java program to contain data that changes during the execution of the program.

A) constant
C) literal
B) item
D) variable

Question 12

A(n) ____ Text Field only allows numbers to be entered into it.

A) E-mail
C) Number
B) Date
D) Password

Question 13

Java variables are case sensitive.

Question 14

You can use int and long data types to store decimal values.

Question 15

A(n) ____ control is a widget similar to a drop-down list for selecting a single item from a fixed listing.

A) EditText
C) Spinner
B) Message
D) TextView

Question 16

A(n) ____ is a short description of a field that is visible as light-colored text.

A) abstract
C) hint
B) clue
D) synopsis

Question 17

A ____ variable can only be initialized once.

A) final
C) static
B) local
D) temporary

Question 18

A hint is also known as a(n) ____.

A) clue
C) tutorial
B) label
D) watermark

Question 19

The only data type that has a default value is boolean.

Question 20

It is possible to code a predefined system theme or a customized theme of your own design.

Question 21

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

A) DecimalFormat
C) NumericFormat
B) DollarFormat
D) StringFormat

Question 22

The ____________________ Text Field allows for input that only appears as stars, thus hiding the actual content.

Question 23

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

Question 24

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

A) Button
C) Number TextView
B) EditText
D) Spinner

Question 25

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

A) brackets
C) parentheses
B) double quote marks
D) single quote marks

Question 26

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

A) assignText()
C) setText()
B) displayText()
D) showText()

Question 27

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
C) int
B) float
D) long

Question 28

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

A) getItem()
C) getText()
B) getSelectedItem()
D) selectedItem()

Question 29

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

A) assign it a value
C) display it
B) check its data type
D) store it in the manifest

Question 30

The operator with the highest order of precedence is ____.

A) ()
C) %
B) ++
D) -

Question 31

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

A) abstract
C) lead-in
B) hint
D) prompt

Question 32

A String can be a single ____.

A) character
C) space
B) digit
D) truth value

Question 33

There are ____ primitive data types in Java.

A) three
C) eight
B) five
D) twelve

Question 34

____________________ is a popular Android app that provides a voice-recognition system for user input.

Question 35

____ is not a numeric primitive data type.

A) byte
C) int
B) char
D) short

Question 36

A file called ____ is a default file that contains commonly used strings for an application.

A) consts.xml
C) strings.xml
B) data.xml
D) values.xml

Question 37

Variables that have not been used have a ____.

A) curly underline
C) red squiggly line
B) green dashed line
D) yellow highlight

Question 38

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

Question 39

A(n) ____ is a series of alphanumeric characters that can include spaces.

A) constant
C) string
B) interface
D) variable

Question 40

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

Question 41

A Spinner control displays a prompt with a list of strings, called ____________________, in a pop-up window.

Question 42

The Parse type to extract a double from a String is ____________________.

Question 43

The code to decrement an integer variable called counter by 1 is ____________________.

Question 44

When a plus sign is placed between two strings, it ____________________ the two strings to create a new string value.

Question 45

____________________ is the use of the String table to change text based on the user's preferred language.

Question 46

The code to format a decimal format as U.S. currency is as follows: ____________________________________________________________.

Question 47

The code necessary to read a number out of an EditText control called txtNumberOfOranges and convert it to an integer, assigned to the variable numOranges, is ____________________.

Question 48

The property that connects a Spinner control to a list of items is called ____________________.

Question 49

The code needed to declare a variable called ticketPrice and initialize it to the value $45.95 is ____________________.

Question 50

The code necessary to find an EditText by the name of txtTickets is ____________________.