Question 1

What is another name for the accessor methods?
A) Setters
B) Getters
C) Instances
D) Attributes

Accepted Answer

Accessor methods are also known as getters. They are responsible for fetching the value of an object's attribute. Setters, on the other hand, are responsible for setting or updating the value of an object's attribute. Instances refer to the individual objects created from a class. Attributes refer to the variables that define the state of an object.

Question 2

A mutator method has no control over the way that a class's data attributes are modified.

Accepted Answer

A mutator method, also known as a setter method, is specifically designed to modify the value of a class's data attributes. Therefore, it has complete control over how those attributes are modified.

Question 3

What are the procedures that an object performs called?
A) Methods
B) Actions
C) Modules
D) Instances

Accepted Answer

The procedures that an object performs are called methods. Methods are functions that are defined within a class, which is a blueprint for creating objects in object-oriented programming. Methods define the behavior of an object and allow it to interact with other objects.

Question 4

What is the combining of data and code in a single object known as?
A) Modularity
B) Instantiation
C) Encapsulation
D) Objectification

Accepted Answer

The combining of data and code in a single object is known as encapsulation. This is a fundamental concept in object-oriented programming and refers to the practice of bundling data and methods that operate on that data within one unit, or object. This approach helps to improve the organization, readability, and security of code by keeping related data and methods together, and by preventing external code from directly accessing or modifying internal data.

Question 5

Object-oriented programming allows us to hide the object's data attributes from code that is outside the object.

Accepted Answer

Encapsulation is a key feature of object-oriented programming which allows us to hide the object's data attributes from code that is outside the object.

Question 6

What is another name for the mutator methods?
A) Setters
B) Getters
C) Instances
D) Attributes

Accepted Answer

Mutator methods are also known as setter methods because they are used to set or change the values of attributes or instance variables of an object.

Question 7

In a UML diagram, the middle section holds the list of the class's methods.

Accepted Answer

The middle section of a UML class diagram holds the list of the class's attributes, not methods.

Question 8

The instances of a class share the data attributes in the class.

Accepted Answer

Each instance of a class has its own separate copy of the data attributes, unless the attribute is defined as a class variable, which is shared among all instances.

Question 9

What type of programming contains class definitions?
A) Procedural
B) Object
C) Object-oriented
D) Modular

Accepted Answer

Class definitions are an essential component of object-oriented programming. Object-oriented programming is a programming paradigm that uses objects containing data and methods to solve problems. Class definitions define the properties and behaviors (or methods) of objects in the program. Therefore, the correct answer is C (Object-oriented).

Question 10

Which section in the UML holds the list of the class's methods?
A) First
B) Second
C) Third
D) Fourth

Accepted Answer

The list of a class's methods is included in the third section of a UML diagram, known as the operations section. The first section is for the class name and attributes, the second section is for the associations, and the fourth section is for any additional notes or information.

Question 11

What type of method provides a safe way for code outside a class to retrieve the values of attributes, without exposing the attributes in a way that they could be changed by the code outside the method?
A) Accessor
B) Mutator
C) Setter
D) Class

Accepted Answer

Accessor methods provide a safe way for code outside a class to retrieve the values of attributes, without exposing the attributes in a way that they could be changed by the code outside the method. Mutator methods, on the other hand, are used to modify the value of an attribute, while setter methods are a type of mutator method used to set an initial value for an attribute. Class refers to the blueprint or template for creating objects.

Question 12

Which section in the UML holds the list of the class's data attributes?
A) First
B) Second
C) Third
D) Fourth

Accepted Answer

In UML class diagrams, the second section is used to list the class's data attributes. The first section contains the class name, and the third section contains the class's operations or methods.

Question 13

What is the special name given to the method that returns a string containing the object's state?
A) __state__
B) __obj__
C) __str__
D) __init__

Accepted Answer

The special name given to the method that returns a string containing the object's state is called __str__. This method is used to define the object's string representation, and is often used for debugging or visualization purposes.

Question 14

Procedures operate on data items that are separate from the procedures.

Accepted Answer

Procedures are designed to operate on data items, but these data items are separate from the procedures themselves. The procedures may receive input data, manipulate it through their logic, and produce output data, without actually changing their own code or structure.

Question 15

What does the acronym UML stand for?
A) Unified Modeling Language
B) United Modeling Language
C) Unified Model Language
D) United Model Language

Accepted Answer

UML stands for Unified Modeling Language, which is a visual language used to represent software systems. It was created by a group of software developers and is now managed by the Object Management Group (OMG). UML diagrams are used to describe different aspects of a software system, from the structure of its code to the interactions between its components.

Question 16

When a method is called, what does Python make to reference the specific object on which the method is supposed to operate?
A) state variable
B) self parameter
C) object data
D) init procedure

Accepted Answer

Python uses the "self" parameter to reference the specific object on which the method is supposed to operate. The "self" parameter allows the method to access the object's attributes and methods.

Question 17

A(n) _____ is a set of real-world objects, parties, and major events related to the problem.
A) class
B) problem domain
C) object
D) instance

Accepted Answer

The problem domain refers to the specific area of focus or subject matter of the problem, which includes the real-world objects, parties, and major events related to it. Class, object, and instance are more specific terms related to programming and are not as relevant to this definition.

Question 18

Which method is automatically executed when an instance of the class is created in memory?
A) __state__
B) __obj__
C) __str__
D) __init__

Accepted Answer

The __init__ method (short for initialize) is automatically executed when an instance of the class is created in memory. Its purpose is to initialize the attributes of the object and it is commonly used to set default values or accept arguments that are used to customize the instance. The __state__, __obj__, and __str__ methods are not automatically executed when an instance is created.

Question 19

What is, conceptually, a self-contained unit that consists of data attributes and methods that operate on the data attributes?
A) Class
B) Object
C) Instance
D) Module

Accepted Answer

The answer of What is, conceptually, a self-contained unit that...

Question 20

What attributes belong to a specific instance of the class?
A) Instance
B) Self
C) Object
D) Data

Accepted Answer

Instance is the correct answer because it refers to a specific instance of a class.

Quiz 10: Classes and Object Oriented Programming

What is another name for the accessor methods?

A mutator method has no control over the way that a class's data attributes are modified.

What are the procedures that an object performs called?

What is the combining of data and code in a single object known as?

Object-oriented programming allows us to hide the object's data attributes from code that is outside the object.

What is another name for the mutator methods?

In a UML diagram, the middle section holds the list of the class's methods.

The instances of a class share the data attributes in the class.

What type of programming contains class definitions?

Which section in the UML holds the list of the class's methods?

What type of method provides a safe way for code outside a class to retrieve the values of attributes, without exposing the attributes in a way that they could be changed by the code outside the method?

Which section in the UML holds the list of the class's data attributes?

What is the special name given to the method that returns a string containing the object's state?

Procedures operate on data items that are separate from the procedures.

What does the acronym UML stand for?

When a method is called, what does Python make to reference the specific object on which the method is supposed to operate?

A(n) _____ is a set of real-world objects, parties, and major events related to the problem.

Which method is automatically executed when an instance of the class is created in memory?

What is, conceptually, a self-contained unit that consists of data attributes and methods that operate on the data attributes?

What attributes belong to a specific instance of the class?