Midterm vocab

Question 1

determine the accessibility of an object’s properties and methods to other methods in the app

Answer 1

access modifier

Question 2

a method that is automatically called when an app is executed

Answer 2

Main Method

Question 3

can be called from outside the class’s declaration’s body by methods of other classes

Answer 3

public accessor “public”

Question 4

a methods return type, indicates that a method will not return any information to its calling method when it completes a task

Answer 4

keyword “void”

Question 5

ex: public void DisplayMessage();

Answer 5

method header

Question 6

ex: public static void Main(string[ ] args);

method can be called w/o first creating an object of the class

Answer 6

keyword “static”

Question 7

are accessible to all classes in the same project

Answer 7

class types (creating new classes)

Question 8

object creation expression

Answer 8

Gradebook mygb = new Gradebook();

Question 9

ex: Gradebook mygb = new Gradebook();
creates a new object of the class specified to the right of the keyword (ie Gradebook)

Answer 9

new operator

Question 10

required, the parenthesis in combination with a class name represent a call to the instructor, which is similar to a method, but used only at the time an object is created to initialize the object’s data

Answer 10

Gradebook mygb = new Gradebook()

Question 11

graphical language used by programmers to represent their object-oriented systems in a standardized matter // summarizes a class’s attributes and operations

Answer 11

UML

Question 12

ON A URL DIAGRAM:

+DisplayMethod()

Answer 12

public visibility symbol

Question 13

additional information needed to perform a method

Answer 13

parameter

Question 14

ex: public void DisplayMethod();

located in the parenthesis that follow the method name.

Answer 14

parameter list

Question 15

indicates to the compiler that the app uses classes in a particular namespace

Answer 15

using directives

Question 16

System.Console.WriteLine(“”);

Answer 16

fully qualified class name

Question 17

variables declared in a body of a method and can only be used in that method

Answer 17

local variables

Question 18

attributes represented by variables; declared inside a class declaration but outside the bodies of the class’s methods declarations

Answer 18

instance variables (fields)

Question 19

used to manipulate an object’s attributes

Answer 19

property

Question 20

accessible only to members of the class in which they’re declared

Answer 20

public accessor “private”

Question 21

declaring instance variables with access modifier private

Answer 21

information hiding (encapsulation)

Question 22

property declaration

Answer 22

ex:
private string courseName; (instance variable)

public string CourseName
{
get
{
return courseName;
}
set
{
courseName = value;
}
}

Question 23

enables a client to read the value of an instance variable

Answer 23

get accessor

Question 24

enables a client to modify the instance variable

Answer 24

set accessor

Question 25

can be read or written by any property or method in the program

Answer 25

public instance variable

Question 26

the client-code can access the instance variable ONLY indirectly through the class’s non-private properties or methods.

Answer 26

private instance variable

Question 27

C# compiler creates a private instance variable, and the get/set accessors for returning and modifying the private instance variables

Answer 27

auto-implemented property

Question 28

allows you to insert pre-defined code termplates

Answer 28

code snippets

Question 29

simple types (int and double); contains a value of that type

Answer 29

value types

Question 30

sometimes called a reference, contains the address of a location in memory where the data referred to by that variable is stored
(refer to an object)

Answer 30

reference types

Question 31

used to initialize an object of a class when the object is created, must have same name as class

Answer 31

constructor

Question 32

type float, have seven significant digits

Answer 32

single-precision floating-point numbers

Question 33

type double, have 15-16 significant digits

Answer 33

double -precision floating-point numbers

Question 34

has 28-29 significant digits

Answer 34

decimal