Programming Homework Help

Programming Homework Help. C# Question

Question 1 (5 points)

The use of references to objects of preexisting classes as members of new objects is called:

Question 1 options:

	inheritance.
	composition.
	polymorphism.
	None of the above

Question 2 (5 points)

Composition is:

Question 2 options:

	a form of software reuse.
	using an object reference as a class member.
	a good design practice.
	All of the above.

Question 3 (5 points)

A class’s __________ initializes members of that class.

Question 3 options:

	constructor
	utility method
	access modifier
	None of the above

Question 4 (5 points)

Instance variables or methods declared with the __________ modifier are accessible only in that class definition.

Question 4 options:

	protected
	static
	private
	None of the above.

Question 5 (5 points)

In a method in which a parameter has the same name as an instance variable, using the this reference allows you to refer to:

Question 5 options:

	the parameter.
	the instance variable.
	It varies depending on the situation.
	None of the above

Question 6 (5 points)

Composition is sometimes referred to as a(n) __________ relationship.

Question 6 options:

	is-a
	has-a
	have-a
	one-to-many

Question 7 (5 points)

A constructor CANNOT:

Question 7 options:

	be overloaded.
	initialize variables to their defaults.
	specify return types or return values.
	have the same name as the class.

Question 8 (5 points)

The __________ of a class are also called the public services or the public interface of the class.

Question 8 options:

	public constructors
	public instance variables
	public methods
	All of the above

Question 9 (5 points)

Constructors:

Question 9 options:

	initialize instance variables.
	when overloaded, can have identical argument lists.
	when overloaded, are selected by number and types of parameters.
	a and c

Question 10 (5 points)

Having a this reference allows a(n):

Question 10 options:

	method to refer explicitly to the instance variables and other methods of the object on which the method was called.
	method to refer implicitly to the instance variables and other methods of the object on which the method was called.
	object to reference itself.
	All of the above

Question 11 (5 points)

Object orientation uses classes to:

Question 11 options:

	develop algorithms.
	encapsulate data and methods.
	organize large amounts of data.
	None of the above

Question 12 (5 points)

Abstract Data Types:

Question 12 options:

	elevate the importance of data.
	are approximations or models of real-world concepts and behaviors.
	capture two notions—data representation and operations.
	All of the above

Question 13 (5 points)

Which of the following should usually be private?

Question 13 options:

	Methods
	Constructors
	Variables
	All of the above

Question 14 (5 points)

Keyword __________ is used for constants whose values cannot be determined at compile time.

Question 14 options:

	const
	readonly
	static
	None of the above

Question 15 (5 points)

Stacks are commonly referred to as __________ data structures.

Question 15 options:

	first-in, last-out
	first-in, first-out
	last-in, first-out
	None of the above

Question 16 (5 points)

Which statement is FALSE?

Question 16 options:

	The compiler always creates a default constructor for a class.
	If a class has constructors, but none of the public constructors are parameterless, and a program attempts to call a parameterless constructor to initialize an object of the class, a compilation error occurs.
	A constructor can be called with no arguments only if the class does not have any constructors or if the class has a public parameterless constructor.
	Parameterless constructors do not have any arguments.

Question 17 (5 points)

Every class inherits directly or indirectly from class:

Question 17 options:

	Inheritor.
	Base.
	Super.
	object.

Question 18 (5 points)

Which of the following describes a static variable?

Question 18 options:

	A variable with one copy shared by all class objects
	A variable whose value may not be changed
	All of the above
	None of the above

Question 19 (5 points)

A __________ can be defined in a class to perform termination housekeeping on an object before the garbage collector reclaims the object’s memory.

Question 19 options:

	destructor
	property
	garbage collector
	None of the above

Question 20 (5 points)