Starting out with Visual C# (4th Edition)
4th Edition
ISBN: 9780134382609
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 1MC
Each object that is created from a class is called a(n)_______ of the class.
- a. reference
- b. example
- c. instance
- d. event
Expert Solution & Answer
Program Description Answer
An instance of a class refers to each object created from a class.
Hence, the correct answer is option “C”.
Explanation of Solution
Instance of a class:
- • A class is defined as a group of user defined data structure that consists of fields, properties, and methods that can perform several operations for all instances of the class.
- • A class acts as a declaration of a real world entity.
- • An object of a class cannot be directly created until it has its own properties and methods.
- • When an instance of a class is created, a separate memory block is being created in the memory.
- • A class is a blue-print which describes how an instance of the class is created.
Explanation for incorrect options:
Reference:
To pass the instance of a class to a method parameter, a reference is used.
Hence, the option “A” is wrong.
Example:
Example contains the real time information regarding an event.
Hence, the option “B” is wrong.
Event:
An event is defined as a specific task performed to attain a target output.
Hence, the option “D” is wrong.
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class SavingsAccount(object):
"""This class represents a savings account
with the owner's name, PIN, and balance."""
RATE = 0.02
def __init__(self, name, pin, balance = 0.0):
self._name = name
self._pin = pin
self._balance = balance
def __str__(self):
result = 'Name: ' + self._name + '\n'
result += 'PIN: ' + self._pin + '\n'
result += 'Balance: ' + str(self._balance)
return result
def getBalance(self):
return self._balance
def getName(self):
return self._name
def getPin(self):
return self._pin
def deposit(self, amount):
"""Deposits the given amount."""
self._balance += amount
return self._balance
def withdraw(self, amount):
"""Withdraws the given amount.
Returns None if successful, or an
error message if unsuccessful."""
if amount < 0:
return 'Amount must be >=…
__________can be used to assign an object of a class to another object of the same class.
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Chapter 9 Solutions
Starting out with Visual C# (4th Edition)
Ch. 9.1 - How is a class like a blueprint?Ch. 9.1 - Briefly describe the process of writing a class...Ch. 9.1 - What is a constructor?Ch. 9.1 - Prob. 9.4CPCh. 9.1 - When you pass an object that is an instance of a...Ch. 9.2 - What is a property?Ch. 9.2 - Prob. 9.7CPCh. 9.2 - Prob. 9.8CPCh. 9.2 - Prob. 9.9CPCh. 9.2 - Prob. 9.10CP
Ch. 9.3 - What is a parameterized constructor?Ch. 9.3 - Prob. 9.12CPCh. 9.3 - Prob. 9.13CPCh. 9.3 - What happens if you write a class with no...Ch. 9.3 - Describe the purpose of the default constructor.Ch. 9.4 - Prob. 9.16CPCh. 9.4 - How can you initialize an array of a class type...Ch. 9.4 - Prob. 9.18CPCh. 9.5 - Prob. 9.19CPCh. 9.5 - When designing an object-oriented application, who...Ch. 9.5 - How do you identify the potential classes in a...Ch. 9.5 - What are a classs responsibilities?Ch. 9.5 - What two questions should you ask to determine a...Ch. 9.5 - Will all a class's actions always be directly...Ch. 9.6 - Prob. 9.25CPCh. 9.6 - Prob. 9.26CPCh. 9.6 - Prob. 9.27CPCh. 9.6 - Prob. 9.28CPCh. 9.6 - Prob. 9.29CPCh. 9 - Each object that is created from a class is called...Ch. 9 - Prob. 2MCCh. 9 - The first line of a class declaration is known as...Ch. 9 - The classs________ are the statements that define...Ch. 9 - A(n) _____ is a method that is automatically...Ch. 9 - A(n) is a special type of class member that allows...Ch. 9 - A special set of methods, known as_________, work...Ch. 9 - Prob. 8MCCh. 9 - The parameter of the set accessor is automatically...Ch. 9 - A can be read, but it cannot be modified. a....Ch. 9 - When the value of an item is dependent on other...Ch. 9 - A constructor that accepts arguments is known as...Ch. 9 - Prob. 13MCCh. 9 - Prob. 14MCCh. 9 - A methods ______ consists of the methods name and...Ch. 9 - A is a constructor that accepts no arguments. a....Ch. 9 - If you write a class with no constructor...Ch. 9 - Prob. 18MCCh. 9 - A classs responsibilities are_______. a. the...Ch. 9 - Prob. 20MCCh. 9 - Objects that are instances of a class are always...Ch. 9 - Prob. 2TFCh. 9 - A class is an object.Ch. 9 - It is a common practice to make all a classs...Ch. 9 - The same rules for naming variables apply to...Ch. 9 - If you need to make a property read only, you...Ch. 9 - If you try to pass a property to a ref or an out...Ch. 9 - Class fields are almost always declared public in...Ch. 9 - The get accessor can be thought of as a method...Ch. 9 - Constructors can accept arguments in the same way...Ch. 9 - It is legal to write a class without any...Ch. 9 - Objects that are instances of a class can be...Ch. 9 - Prob. 13TFCh. 9 - One way to find the classes needed for an...Ch. 9 - Prob. 15TFCh. 9 - By default, a controls Modifiers property is set...Ch. 9 - Prob. 1SACh. 9 - What are the advantages of storing classes in...Ch. 9 - How is a constructor used?Ch. 9 - What is the difference between a class and an...Ch. 9 - What convention do most programmers follow when...Ch. 9 - What is the value parameter? How is it created?Ch. 9 - What is executed any time a class property is...Ch. 9 - What is executed any rime a value is assigned to a...Ch. 9 - How can you protect class fields from accidental...Ch. 9 - Prob. 10SACh. 9 - Is it possible to pass initialization values to...Ch. 9 - How does the compiler distinguish a method from...Ch. 9 - What do you call the constructor that is provided...Ch. 9 - Prob. 14SACh. 9 - Prob. 15SACh. 9 - Prob. 16SACh. 9 - Prob. 17SACh. 9 - Write a statement that creates an instance of the...Ch. 9 - Write the accessors for a property named...Ch. 9 - Prob. 3AWCh. 9 - Look at the following description of a problem...Ch. 9 - Pet Class Create a class named Pet (similar to the...Ch. 9 - Car Class Create a class named Car that has the...Ch. 9 - Personal Information Class Create a class that...Ch. 9 - Employee Class Write a class named Employee that...Ch. 9 - RetailItem Class Write a class named RetailItem...Ch. 9 - Dorm and Meal Plan Calculator A university has the...Ch. 9 - E-Mail Address Book Create an application with a...
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