R4RIN – MCQs, Mock Tests | PHP PHP Mcq– Basics of Object-Oriented PHP

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

1. Polymorphism
2. Inheritance
3. Encapsulation
4. Abstraction

✅ Correct Answer: 3

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?

1. Abstraction
2. Polymorphism
3. Inheritance
4. Differential

✅ Correct Answer: 2

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

1. class creation
2. object creation
3. object instantiation
4. class instantiation

✅ Correct Answer: 4

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

1. $obj = new $foo;
2. $obj = new foo;
3. $obj = new foo ();
4. obj = new foo ();

✅ Correct Answer: 3

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

1. constant PI = “3.1415”;
2. const $PI = “3.1415”;
3. constant PI = ‘3.1415’;
4. const PI = ‘3.1415’;

✅ Correct Answer: 4

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

1. echo PI;
2. echo mathFunction->PI;
3. echo mathFunction::PI;
4. echo mathFunction=PI;

✅ Correct Answer: 3

Which of the following is/are the right way to declare a method? i) function functionName() { function body } ii) scope function functionName() { function body } iii) method methodName() { method body } iv) scope method methodName() { method body }

1. Only ii)
2. Only iv)
3. i) and ii)
4. iii) and iv)

✅ Correct Answer: 3

. Which of the following method scopes is/are not supported by PHP? i) private ii) friendly iii) static iv) abstract

1. Only ii)
2. Only iv)
3. ii) and iv)
4. Only i)

✅ Correct Answer: 1

Which of the following statements is/are true about Constructors in PHP? i) PHP 4 introduced class constructors. ii) Constructors can accept parameters. iii) Constructors can call class methods or other functions. iv) Class constructors can call on other constructors.

1. ii)
2. ii) and iii)
3. i), ii), iii) and iv)
4. ii), iii) and iv)

✅ Correct Answer: 3

PHP recognizes constructors by the name _________

1. classname()
2. _construct()
3. function _construct()
4. function __construct()

✅ Correct Answer: 4

Which version of PHP introduced the instanceof keyword?

1. PHP 4
2. PHP 5
3. PHP 5.3
4. PHP 6

✅ Correct Answer: 2

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

1. exist()
2. exist_class()
3. class_exist()
4. __exist()

✅ Correct Answer: 3

Which one of the following functions is used to determine object type?

1. obj_type()
2. type()
3. is_a()
4. is_obj()

✅ Correct Answer: 3

Which one of the following keyword is used to inherit our subclass into a superclass?

1. extends
2. implements
3. inherit
4. include

✅ Correct Answer: 1

. In the following PHP code, what is/are the properties? <?php class Example { public $name; function Sample() { echo "This is an example"; } } ?>

1. echo “This is an example”;
2. public $name;
3. class Example
4. function sample()

✅ Correct Answer: 2

Which keyword is used to refer to properties or methods within the class itself?

1. private
2. public
3. protected
4. $this

✅ Correct Answer: 4

Which of the following advanced OOP features is/are not supported by PHP?

1. Method overloading
2. Multiple Inheritance
3. Namespaces
4. Object Cloning

✅ Correct Answer: 3

Which one of the following is the right way to clone an object?

1. _clone(targetObject);
2. destinationObject = clone targetObject;
3. destinationObject = _clone(targetObject);
4. destinationObject = clone(targetObject);

✅ Correct Answer: 2

Which of the following is/are true for an abstract class? i) Abstract classes in PHP are declared with the help of abstract keyword. ii) A class is declare abstract by using the keyword implements. iii) It is a class that really isn’t supposed to ever be instantiated but instead serves as a base class. iv) Attempting to instantiate an abstract class results in an error.

1. Only i)
2. Only iii)
3. ii) and iv)
4. ii), iii) and iv)

✅ Correct Answer: 1

If one intends to create a model that will be assumed by a number of closely related objects, which class must be used?

1. Normal class
2. Static class
3. Abstract class
4. Interface

✅ Correct Answer: 3

Which method is used to tweak an object’s cloning behavior?

1. clone()
2. __clone()
3. _clone
4. object_clone()

✅ Correct Answer: 2

Which feature allows us to call more than one method or function of the class in single instruction?

1. Typecasting
2. Method Including
3. Method adding
4. Method chaining

✅ Correct Answer: 4

Which magic method is used to implement overloading in PHP?

1. __call
2. __invoke
3. __wakeup
4. __unset

✅ Correct Answer: 1