PHP Questions and Answers – Object-Oriented OOP – Part 1
This collection of PHP Multiple Choice Questions and Answers (MCQs): Quizzes & Practice Tests with Answer focuses on “Object-Oriented OOP”.
1. The concept of separating the user from the internal details of an application is known as_____________
A Abstraction
B Polymorphism
C Inheritance
D Encapsulation
D
In object-oriented PHP encapsulation is a practice of attaching the data members and methods in a single module.
2. The concept of creating objects based on pre-defined classes is known as_____________
A Class creation
B Class instantiation
C Object creation
D Object instantiation
D
In object-oriented programming, classes are the schemes of PHP objects. Classes do not become objects before instantiation is done. When someone instantiates a class, it creates an instance of it, thus creating the object. In other words, instantiation is the process of creating an instance of an object in memory.
3. Classes are the ___________ of objects.
A reference
B type
C blueprints
D instances
C
Classes are the blueprints of objects.
4. Objects are also known as _________.
A reference
B type
C blueprints
D instances
D
We define a class once and then instantiate many objects that belong to them.
5. Class is a user-defined data type, which includes ______ methods and _______ variable?
A local, global
B global, global
C global, local
D local, local
D
Class is a user-defined data type, which includes local methods and local variable.
6. How to defin a new class called “MyClass”?
A class MyClass ()
B class MyClass []
C class MyClass {}
D MyClass class{}
C
The class is enclosed using curly braces { } just like functions.
7. Object are created using _______ keyword?
A object
B create
C new
D obj()
C
Object are created using new keyword.
Example:
Example:
$obj = new MyClass;
8. To define a new class you start with the keyword ________ ?
A var
B class
C new
D function
B
To define a new class you start with the keyword “class”.
9. Constructor is also called ______ function
A automatic
B find
C magic
D key
C
A constructor is also called magic function since, in PHP, magic methods generally start with two underscore __.
10. Which of the following built-in functions is used to determine object type?
A is_a()
B type()
C obj_type()
D is_obj()
A
The built-in function is_a() returns true if the object belongs to a class type or if it belongs to a class that is a child of that class. Or else false is returned.
- PHP MCQ – Multiple Choice Questions and Answers – Basics – Part 1
- PHP MCQ – Multiple Choice Questions and Answers – Basics – Part 2
- PHP MCQ – Multiple Choice Questions and Answers – Basics – Part 3
- PHP Questions and Answers – Functions – Part 1
- PHP Questions and Answers – Functions – Part 2
- PHP Questions and Answers – Arrays – Part 1
- PHP Questions and Answers – Arrays – Part 2
- PHP Questions and Answers – Arrays – Part 3
- PHP Questions and Answers – Arrays – Part 4
- PHP Questions and Answers – Object-Oriented OOP – Part 1
- PHP Questions and Answers – Object-Oriented OOP – Part 2
- PHP Questions and Answers – Object-Oriented OOP – Part 3
- PHP Questions and Answers – String – Part 1
- PHP Questions and Answers – String – Part 2
- PHP Questions and Answers – Regular Expressions
- PHP Questions and Answers – Exception Handling
