Deck 3: Engage Android User Input, Variables, Operations

Question 1

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

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

Answer 1

B

Question 2

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

Answer 2

True

Question 3

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

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

Answer 3

C

Question 4

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

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

Question 5

Java variables are case sensitive.

Question 6

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

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

Question 7

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

Question 8

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

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

Question 9

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

Question 10

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

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

Question 11

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

Question 12

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

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

Question 13

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

Question 14

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

Question 15

The aim of requesting input from the user is to ensure that every user experience is the same every time the app is used.

Question 16

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

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

Question 17

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

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

Question 18

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

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

Question 19

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

Question 20

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

Question 21

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

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

Question 22

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

Question 23

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

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

Question 24

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

Question 25

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

Question 26

A String can be a single ____ .

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

Question 27

The operator with the highest order of precedence is ____.

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

Question 28

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

Question 29

Which data type is not a numeric primitive?

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

Question 30

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

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

Question 31

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

Question 32

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

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

Question 33

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

Question 34

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

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

Question 35

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

Question 36

A ____ variable can only be initialized once.

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

Question 37

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

Question 38

There are ____ primitive data types in Java.

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

Question 39

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

Question 40

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

Question 41

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

Question 42

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

Question 43

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

Question 44

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

Question 45

The code necessary to read a number out of an EditText control called txtNumberOfTickets and convert it to an integer, assigned to the variable numTickets , is as follows: ____________________.

Question 46

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

Question 47

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

Question 48

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

Question 49

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

Question 50

The code needed to declare a variable called costPerTicket and initialize it to the value $79.99 is ____________________.