Deck 7: Using Methods

Question 1

With ____, if a programmer changes the way in which a method internally works, programs that use that method will not be affected and will not need to be modified.

A) overloading
B) implementation hiding
C) polymorphism
D) inheritance

Answer 1

B

Question 2

Because the ReadLine() method call can be assigned to a string, its return type is ____ .

A) int
B) Object
C) bool
D) string

Answer 2

D

Question 3

The type of an argument in a method call must exactly match the type of the corresponding parameter specified in the method declaration.

Answer 3

False

Question 4

If you use the keyword modifier ____, you indicate that a method can be called by referring to the class rather than an object from the class.

A) static
B) internal
C) protected
D) nonstatic

Question 5

A method ____ is a variable that holds data passed to the method when it is called; it receives an argument's value when the method executes.

A) element
B) parameter
C) literal
D) declaration

Question 6

The ____ accessibility modifier allows access to a method from other classes.

A) public
B) protected
C) private
D) protected internal

Question 7

A program element's ____ is the segment of code in which it can be used.

A) scope
B) locality
C) accessibility
D) nesting

Question 8

A declaration for a method that receives two or more arguments must list the type for each parameter separately only if the parameters have different types.

Question 9

A parameter within a method header is called a(n) ____ parameter.

A) formal
B) local
C) global
D) actual

Question 10

A method can return, at most, one value to a method that calls it.

Question 11

To more easily incorporate methods into a program, it is common practice to store methods in their own classes and files. Then you can add them into any application that uses them. The resulting compound program is called a(n) ____.

A) interface
B) multifile assembly
C) hid assembly
D) hid implementation

Question 12

A(n) ____ is a device you can use without knowing how it works internally.

A) white box
B) interface
C) black box
D) method

Question 13

Methods can ____, or call, other methods; that is, a program uses a method's name and the method performs a job for the class.

A) instantiate
B) overload
C) inherit
D) invoke

Question 14

The ____ accessibility modifier limits method access to the class that contains the method.

A) protected
B) private
C) protected internal
D) internal

Question 15

If you do not provide an accessibility modifier for a method, it is private by default.

Question 16

A method that uses another is called a ____ of the method it uses.

A) peer
B) server
C) pair
D) client

Question 17

The number of arguments does not need to match the number in the parameter list when you use ____.

A) default arguments
B) value parameters
C) scope relaxation
D) non-critical parameters

Question 18

Arrays, like all objects, are passed by value.

Question 19

The optional declared ____ for a method (for example, public ) sets limits as to how other methods can use it.

A) protection
B) qualifier
C) accessibility
D) type

Question 20

A formal parameter that receives a copy of the value passed to it is also an example of a(n) ____ parameter.

A) reference
B) output
C) input
D) value

Question 21

What are the components of a C# method declaration?

Question 23

What are the components of a C# method?

Question 24

Every method has a(n) ____________________, indicating what kind of value the method will return to any other method that calls it.

Question 25

You indicate that a method parameter is an array by placing ____ after the data type in the method's parameter list.

A) ()
B) $
C) []
D) {}

Question 26

The keyword static is used with Main() methods in console applications because the method is associated with its containing class and not with an object. Why are Form methods, such as a Click() method that responds to button clicks, nonstatic?

Question 27

You can tell a lot about a built-in method when you see how it is used. What can you tell about the built-in Pow() method (used to raise a number to a power) from the following statement?
double result = Math.Pow(2.0, 3.0);

Question 28

Describe how nested method calls work. For example, if you have three nested method calls, which method executes first and how are return values propagated? Is there a limit to how many method calls can be nested?

Question 29

If a method does not return a value, its return type is ____________________.

Question 30

A(n) ____________________ is an encapsulated series of statements that carry out a task.

Question 31

A method ____________________ is a block of statements that carry out the method's work.

Question 32

If you create a Click() method that responds to button clicks, it will be ____ by default because it is associated with an object that is a Form .

A) local
B) static
C) qualified
D) nonstatic

Question 33

A method ____________________ defines the rules for using the method and can include accessibility, static, and return type modifiers.

Question 34

A ____ statement causes a value to be sent back to the calling method.

A) break
B) result
C) return
D) continue

Question 35

When you place a Button named okButton on a Form in the IDE and double-click it, a method is automatically generated with the following header: ____ okButton_Click( object sender, EventArgs e) .

A) public void
B) private void
C) static void
D) private int

Question 36

When method calls are placed inside other method calls, the calls are ____ method calls.

A) nested
B) interleaved
C) cascaded
D) children

Question 37

Write a DisplaySalesTax() method that receives the sales amount and tax rate as double s, and calculates and displays the sales tax. The method does not return a value.

Question 38

When an array passed to a method is passed by ____, the method receives the actual memory address of the array and has access to the actual values in the array elements.

A) reference
B) value
C) output
D) input

Question 39

For a method that accepts a parameter, what are the components of the parameter definition that must be included in the method declaration? Show an example of a method declaration with a parameter.

Question 40

What are the two most common accessibility levels in C#?

Question 41

Explain how to write a Main() method that accepts parameters. Why might this format be used?

Question 42

When writing an event-handling method in a GUI application, what should you consider about a variable's scope?