Ch4

In what graphics format should launcher icons be saved?

.png

The condition necessary to test if a variable stockPrice is below 0.30 is ____________________.

0.30 < stockPrice

When you publish an app in the Android Market, you must provide an icon of size ____________________ (state as number x number) as the display icon in the Market.

512 X 512

For a extra high-density screen, the pixel size of an icon should be ____________________ (state as number x number).

96 X 96

Which symbol is the operator for "equal to?"

==

Which of the following types of controls always operates independently, therefore selecting it will never deselect any other controls?

CheckBox control

Never offer a default selection, as it complicates user input. T/F

False

The following condition is valid: (6 || ticketPrice) > (450.45 == "vacation"). T/F

False

When you are comparing one string to another string, use the == operator. T/F

False

Whenever possible, you should use the default launcher icon so your app looks as uniform as possible with other apps. T/F

False

When you have one set of instructions to execute when a condition is true and another set of instructions if the same condition is false, which statement would you use?

If Else statement

When does a toast notification disappear from the screen?

It automatically fades after a set amount of time

To create a toast message of long duration, you use the _____________________ keyword in the makeText method.

LENGTH_LONG

____________________ controls are used to select and deselect an option.

RadioButton

In what are RadioButton controls usually used together, which causes only one RadioButton to be selected at a time?

RadioGroup

What method call is used to display a toast notification?

Toast.makeText

Which of the following is the correct syntax for displaying a toast message for a long length of time?

Toast.makeText(MainActivity.this, "A toast message", Toast.LENGTH_LONG).show( );

The code to display the short toast message "Hi mom" is _________________________________________________________________.@@@

Toast.makeText(MainActivity.this, "Hi mom", Toast.LENGTH_SHORT).show();

A toast notification communicates messages to the user. T/F

True

A toast notification is an easy way to inform the user of a failed data validation. T/F

True

Java automatically indents statements within an If Else statement to indicate that the statements are within the If Else structure. T/F

True

Launcher icons form the first impression of your app on prospective users in Google Play. T/F

True

RadioButton controls are circular in shape, while CheckBox controls are square. T/F

True

The statement 6<=6 is true. T/F

True

Which of the following types of graphics are best to use for icon design because the images can be scaled without loss of detail?

Vector-based graphics

When two Strings are compared, they are ordered ____________________.

alphabetically

The isChecked method makes use of the ____________________ property of the RadioButton or CheckBox control.

checked

To compare the alphabetical order of two strings, what should be used?

compareTo method

When more than one condition is included in an If statement, what is the condition called?

compound condition

You can test for a(n) ____________________ being true or false and change the flow of what happens in a program based on the user's input.

condition

Decision-making statements in Java allow you to test which of the following?

conditions

Which term defines a fundamental control structure used in computer programming?

decision structure

What is used to compare Strings in Java for equality?

equals method

Which property can center a control horizontally as well as position it at other places on the screen?

gravity property

What is the resulting value of the expression "sears".compareTo("chicago")?

greater than 0

Which of the following terms best describes a triplet of three colors which encodes different colors?

hexadecimal color code

A custom launcher icon image can be placed in the res/mipmap folder by adding a(n) _______________________ using a built-in wizard in Android Studio.

image asset

What is the method used to test a checked property on a radio button?

isChecked() method

The icon on the home screen that represents your application is referred to as which of the following?

launcher icon

What is the icon used to start your app called?

launcher icon

Instead of eyeballing the controls on the user interface for alignment, you can use the ____________________ property to create the desired spacing around controls.

layout:margin

Which term can be used to change the spacing around each object in your layout?

margins

When an If statement is placed inside another If statement, what is the inner If statement considered to be?

nested

What does a toast notification use to display a message?

only the amount of space needed

What tool does Java provide to compare the relationship between the variables being tested in conditional statements?

relational operators

Let the String variable city be set to the value "Boston". The truth value of the expression (city.compareTo("Anaheim") > 0) is ____________________.

true

The truth value of the expression !(false && (true || !false) && (!false || !true)) is ____________________.

true

What is a common mistake made when forming a conditional statement?

using the assignment operator instead of the comparison operator

The process of verifying that a value entered by a user is acceptable for what the program is expecting is called ________________.

validation

The hexadecimal color code for red is ____________________.

#FF0000