Deck 8: Improving the User Interface

Question 1

The printf method could be used to specify the ____ in a floating-point number.

A) placement of the decimal
B) number of digits to the right of the decimal point
C) exponents
D) value

Answer 1

B

Question 2

In a table, trailing or forward spaces are used to occupy columns that are not filled by a value. ____________________

Answer 2

False

Question 3

The ____ method is used to apply formatting.

A) formatchar
B) println
C) enhancetext
D) printf

Answer 3

D

Question 4

The parameters of the method printf consist of a ____ and one or more data values.

A) fixed-point number
B) floating-point number
C) format string
D) controller pattern

Question 5

The Thermometer class stores the temperature internally in Fahrenheit.

Question 6

The print and println methods do not generally display all of the digits in floating-point numbers.

Question 7

The String method format expects the same parameters as the printf method, and returns a formatted string.

Question 8

The l character is used for a platform-independent end of line. ____________________

Question 9

Real GUI programs are event-driven. ____________________

Question 10

The key feature of a formatted table is that each column has a designated width, and all the values in a column are justified in the same manner. ____________________

Question 11

The controller would be responsible for instantiating and attaching an object to a command button.

Question 12

A controller pattern is a combination of literal string information and formatting information.

Question 13

The best way for a program to respond when an invalid number format is entered is to halt the program.

Question 14

Java supports the type double for numbers with many digits of precision.

Question 15

The String variable ____ controls how many times a loop repeats.

A) whenEnd
B) doItAgain
C) stopWhen
D) ifEnd

Question 16

A GUIWindow is just a JFrame with some extra behavior.

Question 17

The key feature of a formatted table is that each column has a designated width, and all the values in a column are justified in the same manner.

Question 18

The method printf includes several format flags that support justification as well as other styles.

Question 19

Which of the following is NOT an example of a technique for handling repeating sets of inputs?

A) Boolean
B) count
C) query
D) sentinel

Question 20

A data model class is responsible for initializing and managing the data used by the program. ____________________

Question 21

The ____ code is used to display an octal integer.

A) d
B) f
C) o
D) x

Question 22

Alignment of text in a table column is called ____.

A) leading space
B) application
C) specification
D) justification

Question 23

A(n) ____ statement is used to detect and respond to an exception so it does not halt the program.

A) if-else
B) try-catch
C) void
D) listener

Question 24

The ____ is a set of classes that sets up the other elements in a main method, so as to provide an entry point for running a Java program.

A) model
B) application
C) view
D) controller

Question 25

The ____ flag is used for left justification.

A) ,
B) l
C) <
D) -

Question 26

A(n) ____________________-driven program begins by displaying a list of options from which the user selects one.

Question 27

A(n) ____________________-controlled input technique asks the user if there are more inputs before continuing.

Question 28

A formatting specifier code begins with a ____ character.

A) %
B) *
C) /
D) &

Question 29

FIGURE 8-2
Figure 8-2 above shows the interface for a ____-controlled program.

A) count
B) menu
C) query
D) sentinel

Question 30

When a(n) ____ program opens, it sits there and waits for events such as the user clicking the mouse.

A) Java
B) GUI
C) menu-driven
D) application

Question 31

The ____ character is used to display a fixed floating-point integer.

A) d
B) f
C) o
D) x

Question 32

The ____ character is used in the display of a string.

A) e
B) g
C) n
D) s

Question 33

The ____ is a set of classes that are listeners.

A) model
B) application
C) view
D) controller

Question 34

The ____ character is used in the display of 167.e+2.

A) e
B) g
C) n
D) s

Question 35

The ____ character is used to display a decimal integer.

A) d
B) f
C) o
D) x

Question 36

The ____________________ format flag is used to show decimal separators.

Question 37

Identify the letter of the choice that best matches the phrase or definition.
a.^
b.0
c.x
d.model
e.controller
Used to convert letters to uppercase.

Question 38

A(n) ____________________ consists of a fixed number of columns within which the characters of a data value can be placed.

Question 39

FIGURE 8-1
Figure 8-1 above shows the interface for a ____-controlled program.

A) count
B) menu
C) query
D) sentinel

Question 40

The ____ is responsible for displaying the data model and providing the user with visual controls for interaction.

A) model
B) application
C) view
D) controller

Question 41

Identify the letter of the choice that best matches the phrase or definition.
a.^
b.0
c.x
d.model
e.controller
An example is the Thermometer class.

Question 42

Identify the letter of the choice that best matches the phrase or definition.
a.^
b.0
c.x
d.model
e.controller
Used to format a hexadecimal integer.

Question 43

Identify the letter of the choice that best matches the phrase or definition.
a.^
b.0
c.x
d.model
e.controller
Responsible for handling user interaction with the program.

Question 44

Identify the letter of the choice that best matches the phrase or definition.
a.^
b.0
c.x
d.model
e.controller
Used to show leading zeroes.

Question 45

How does a try-catch statement work? Why are they important? Describe a situation in which one might be helpful.