Object Oriented Concept MCQs with Answers 2027

Q41

Which keyword must be added before

f i r s t v a r iab l eo n t h e t hi r d l in eo f t h e ab o v e q u es t i o n t o mak e

second and $first as distinct objects in PHP 5?

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Q42

Open question

What will be the output of the following PHP code

class Person 
{
    function getName() { return "Bob"; }
    function getAge() { return 44; }
    function __toString() {
         $d esc < s p an c l a ss = " p - b l u e " >=$ this->getName();
         $d esc . < s p an c l a ss = " p - b l u e " >=< / s p an > " (< s p an c l a ss = " p - r e d " > a g e < / s p an > ". < s p an c l a ss = " p - b l u e " >$ this->getAge().")";
        return $desc;
    }
}
$person = new Person();
print $person;

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Q43

Open question

______clone() is run on the _______ object.

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Q44

Open question

Which method is invoked when an undefined property is accessed ?

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Q45

Open question

What will be the output of the following PHP code?

class Checkout
 {
    final function totalize() 
    {
        // calculate bill
    }
 }
 
class IllegalCheckout extends Checkout 
{
    final function totalize() 
    {
        // change bill calculation
    }
}

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Q46

Open question

The practice of separating the user from the true inner workings of an application through well-known interfaces is known as _________

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Q47

Open question

Which of the following term originates from the Greek language that means “having multiple forms,” defines OOP’s ability to redefine, a class’s characteristics?

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Q48

Open question

The practice of creating objects based on predefined classes is often referred to as.

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Q49

Open question

Which one of the following property scopes is not supported by PHP?

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Q50

Open question

Which one of the following can be used to instantiate an object in PHP assuming class name to be Foo?

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Q51

Open question

Which one of the following is the right way to define a constant?

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Q52

Open question

Which one of the following is the right way to call a class constant, given that the class is mathFunction?

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Q53

Open question

Which one of the following is the right way to invoke a method?

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Q54

Open question

Which of the following is/are the right way to declare a method?
1. function functionName() { function body }
2. scope function functionName() { function body }
3. method methodName() { method body }
4. scope method methodName() { method body }

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Q55

Open question

Which of the following method scopes is/are not supported by PHP?
1. private
2. final
3. static
4 abstract

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Q56

Open question

Which method scope prevents a method from being overridden by a subclass?

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Q57

Open question

Which of the following statements is/are true about Constructors in PHP?
1. PHP 4 introduced class constructors.
2. Constructors can accept parameters.
3. Constructors can call class methods or other functions.
4. Class constructors can call on other constructors.

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Q58

Open question

PHP recognizes constructors by the name_________

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Q59

Open question

Which version of PHP introduced the instanceof keyword?

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Q60

Open question

Which one of the following functions is used to determine whether a class exists?

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Object Oriented Conceptpractice.

Object Oriented Concept
practice.