PHP Questions and Answers – Object-Oriented OOP – Part 3

This collection of PHP Multiple Choice Questions and Answers (MCQs): Quizzes & Practice Tests with Answer focuses on “Object-Oriented OOP”.
 

1. Which keyword is used to reference a property or a method in a class itself?

A Protected

B Public

C Private

D this

2. What is the result of the following PHP code?

<?php 
    class Person
    {
        public function __construct(){
            echo 'The class "' . __CLASS__ . '" was initiated!'; 
        }
    }
    
    $p = new Person; 
?>

A The class __CLASS__ was initiated!

B The class “Person” was initiated!

C The class “p” was initiated!

D Error

3. The child class inherits from _________

A Child class

B Parent class

C Super class

D Base class

4. Which the following is the correct way to define a constant?

A constant AGE = “25”;

B const $AGE = “25”;

C constant AGE = ‘25’;

D const AGE = ‘25’;

5. Assume we have the class Person. Which is the correct way to call a class constant ?

A echo AGE;

B echo Person->AGE;

C echo Person::AGE;

D echo Person=AGE;

6. Which of the following practice is/are not supported by PHP?

A Multiple Inheritance

B Namespaces

C Object Cloning

D Method overloading

7. Which of the following is the correct way to clone an object in PHP?

A _clone(srcObject);

B destObject = clone srcObject;

C destObject = _clone(srcObject);

D destObject = clone(srcObject);

8. Which is/are true for an abstract class?

A Abstract class is declared using the “abstract” keyword.

B Abstract class is declared using the “implements” keyword.

C It is a class that’s not assumed to be instantiated but instead plays as a base class.

D Trying to instantiate an abstract class results in an error.

9. If your object need to inherit behavior from different sources you should use _________

A Abstract class

B Class

C Static class

D Interface

10. Which practice used to call several methods or functions of the class in one instruction?

A Method Including

B Method adding

C Method chaining

D Trait

$p = new Proposal();
$p->createProposal()->sendProposalByEmail()->checkPayement();

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