Question 1

Class names in PHP usually begin with a lowercase letter.

Accepted Answer

Class names in PHP usually begin with an uppercase letter.

Question 2

The term object specifically refers to programming code and data that can be treated as an individual unit or component.

Accepted Answer

This is a correct definition of the term object in programming. Objects are individual units of code and data that can be manipulated and reused within a program.

Question 3

The term object-oriented programming (OOP) refers to the concept of merging related variables and functions into a single interface.

Accepted Answer

OOP is based on the principle of encapsulation, which involves combining data and functions into a single unit known as a class, to provide a clear and organized structure to the program.

Question 4

Objects are encapsulated, which means that all code and required data are contained within the object itself.

Accepted Answer

Encapsulation is one of the fundamental principles of object-oriented programming (OOP) that ensures data and the code that works on it are bound together within a single unit called a class. This keeps the internal details of an object hidden from the rest of the program and provides a level of security and maintainability.

Question 5

The term data structure refers to a system for organizing classes.

Accepted Answer

The term data structure refers to a system for organizing and storing data in a computer so that it can be accessed and used efficiently. It does not refer to organizing classes.

Question 6

Data are often also called components.

Accepted Answer

Data and components are not the same thing. Data refers to the information itself, while components are the parts or elements that make up a system or process.

Question 7

An interface refers to objects that are required for a source program to communicate with data.

Accepted Answer

An interface in programming defines a contract for what a class can do, without specifying how it does it. It's not specifically about communication with data but about defining methods that must be implemented by any class that implements the interface.

Question 8

When you delete an object from an existing class, you are said to be instantiating the object.

Accepted Answer

When you delete an object from an existing class, you are actually destroying the instance of the object, not instantiating it. Instantiating means creating a new instance of an object.

Question 9

The term, garbage collection, refers to cleaning up, or reclaiming, memory that is reserved by a program.

Accepted Answer

Garbage collection automatically identifies and removes unused memory in a program to make it available for other processes.

Question 10

A class constructor is a special attribute with the same name as its class that is called automatically when an object from the class is instantiated.

Accepted Answer

A class constructor is a special method, not an attribute, typically with a name like `__init__` in Python, that is called automatically when an object from the class is instantiated.

Question 11

Class functions are referred to as data members or member data.

Accepted Answer

Class functions are referred to as member functions, while data members are the variables or attributes stored within the class.

Question 12

Class variables are referred to as data members or member variables.

Accepted Answer

Class variables are also commonly known as data members or member variables.

Question 13

In object-oriented programming, the code, methods, attributes, and other information that make up an object are organized into classes.

Accepted Answer

In object-oriented programming, classes are used to create objects that have specific attributes and behaviors (methods). The code, methods, and attributes that make up an object are defined within the class, which acts as a blueprint for creating new instances of that object.

Question 14

To create a class in PHP, you use the class keyword to write a class definition, which contains that data members and member functions that make up the class.

Accepted Answer

This is true. The class keyword is used to define a new class in PHP and contains the data members and member functions that make up the class.

Question 15

After you instantiate an object, you use a hyphen and a greater-than symbol (->), referred to as member selection notation, to access the methods and properties contained in the object.

Accepted Answer

This is true. The member selection notation (->) is used to access methods and properties in an instantiated object in many programming languages, including C++, PHP, and Objective-C.

Question 16

The term data refers to information contained within objects or other types of storage structures

Accepted Answer

The answer of The term data refers to information contained...

Question 17

The functions and variables defined in a class are called functional members

Accepted Answer

The functions defined in a class are called methods, and the variables are called attributes or properties, not functional members.

Question 18

Variables that are associated with an object are called properties or attributes.

Accepted Answer

Properties or attributes describe characteristics of an object, and are hence associated with it.

Question 19

The functions associated with an object are called methods.

Accepted Answer

This statement is true. Methods are used to perform actions or operations on an object in object-oriented programming.

Question 20

An instance is an object that has been created from an existing class.

Accepted Answer

An instance is an object that is created from an existing class. It has all the properties and behaviors of that class, but can also have unique values assigned to its properties.

Quiz 10: Developing Object-Oriented Php