Starting Out with Python (4th Edition)
4th Edition
ISBN: 9780134444321
Author: Tony Gaddis
Publisher: PEARSON
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Chapter 11, Problem 5MC
Program Description Answer
“isinstance()” function is used to determine whether the given object is an instance of the given class.
Hence, the correct answer is option “C”.
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It is possible for a class to have more than one constructor.A) This is correct.
B) The answer is False.
When you instantiate an object from a class, you give a name to this particular object so that your program can distinguish it from other objects you instantiate from the same class.
True
False
The code below demonstrates the Idea of constructor overloading. However, the programmer forgot to add the main function to execute the code. Produce the main function and create three object variables, one for each of the constructors and initialize them. By using the display() method, write the necessary codes to display the output of the each constructor. #include <iostream> using namespace std; class CHELSEA { private: int x,y; public: CHELSEA () //constructor 1 with no arguments { x = y = 0; } CHELSEA(int a) //constructor 2 with one argument { x = y = a; } CHELSEA(int a,int b) //constructor 3 with two argument { x = a;
4 y = b; } void display() { cout << "x = " << x << " and " << "y = " << y << endl; } };
Chapter 11 Solutions
Starting Out with Python (4th Edition)
Ch. 11.1 - In this section, we discussed superclasses and...Ch. 11.1 - Prob. 2CPCh. 11.1 - What does a subclass inherit from its superclass?Ch. 11.1 - Look at the following code, which is the first...Ch. 11.2 - Look at the following class definitions: class...Ch. 11 - In an inheritance relationship, the ___________ is...Ch. 11 - In an inheritance relationship, the _________ is...Ch. 11 - Suppose a program uses two classes: Airplane and...Ch. 11 - This characteristic of object-oriented programming...Ch. 11 - Prob. 5MC
Ch. 11 - Polymorphism allows you to write methods in a...Ch. 11 - It is not possible to call a superclasss _ _init_...Ch. 11 - A subclass can have a method with the same name as...Ch. 11 - Only the _ _init_ _method can be overridden.Ch. 11 - You cannot use the isinstance function to...Ch. 11 - What does a subclass inherit from its superclass?Ch. 11 - Look at the following class definition. What is...Ch. 11 - Prob. 3SACh. 11 - Write the first line of the definition for a...Ch. 11 - Look at the following class definitions: class...Ch. 11 - Look at the following class definition: class...Ch. 11 - Employee and ProductionWorker Classes Write an...Ch. 11 - ShiftSupervisor Class In a particular factory, a...Ch. 11 - Person and Customer Classes The Person and...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Which of the following applies to destructors? Choose all that apply. A.) A destructor is a function that automatically gets called when an object of its class falls out of scope. B.) If you create a copy constructor, you must also create a copy destructor. C.) A destructor cannot take any parameters. D.) A destructor cannot return a value.arrow_forwardIn Python: Which of the following can be used to determine whether an object is an instance of a class? the isinstance function the in operator The is_object_of function The typeof functionarrow_forwardSuppose object1 and object2 are objects in the same class. When will the following if statement return true? if(object1 == object2)arrow_forward
- Given the code below, which of the following C++ statements is a valid way to instantiate a new instance of the Motor class? class Motor { public: int cams; double ccu; Motor() { ccu = 350.05; } Motor(int a, double b) { } } Motor hemi; Motor Motor; {Motor hemi(455, 203.25, 0); Motor hemi(0);arrow_forward__________ is the default behavior when an object is assigned the value of another object of the same class.arrow_forwardIn Python, to make a variable inside a class private so that functions that are not methods of the class (such as main() ) cannot access it, you must _____________ write the word private then a space before the variable name write the word hide then a space before the variable name start the name of the variable with two underscores do nothing because Python variables declared inside a class are private by defaultarrow_forward
- A private data member of a class may be accessed by a program's main() function. (C++) a) True b) Falsearrow_forwardA method that returns the value of an object's instance variable is calleda(n)a) mutator b) function c) constructor d) accessorarrow_forwardIn this task, we’re going to be simulating an email message. Some of the logic hasbeen filled out for you in the email.py file.● Open the file called email.py.● Create a class definition for an Email which has four variables:has_been_read, email_contents, is_spam and from_address.● The constructor should initialise the sender’s email address.● The constructor should also initialise has_been_read and is_spam to false.● Create a function in this class called mark_as_read which should changehas_been_read to true.● Create a function in this class called mark_as_spam which should changeis_spam to true.● Create a list called inbox to store all emails (note that you can have a list ofobjects).● Then create the following methods:○ add_email - which takes in the contents and email address from thereceived email to make a new Email object.○ get_count - returns the number of messages in the store.○ get_email - returns the contents of an email in the list. For this, allowthe user to input an index…arrow_forward
- You cannot use the isinstance function to determine whether an object is an instance of a subclass of a class.True or Falsearrow_forwardThe following code may, or may not, work. However the bigger issue is that it doesn't give good information to the end user. Assume that there is a Circle class, like we've defined in class before. Fix what problems you see, that could affect naming conventions, capitalization, and data output, and make sure the data output is clean for the end user. cout << "For Circle 1:" << endl; cout << c1.getArea() << endl; cout << c1.getx() << " " << c1.gety() << endl; cout << c1.getcolor() << endl; cout << endl << endl; This is the full question and it is c++arrow_forwardAssume there are two objects, A and B, declared for a particular class that contains this field public static int counter = 60; If the field is decremented through the A object reference, where will the result of the decrement be seen?arrow_forward
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