9. In PHP, what is the purpose of the final keyword?

Which of the following is NOT a principle of OOP?

A). Inheritance

B). Polymorphism

C). Abstraction

D). Linearity

Which of the following statements is true about polymorphism?

A). It allows a class to inherit from multiple classes

B). It allows a class to have multiple constructors

C). It allows a method to have multiple implementations

D). It allows a class to override parent class methods

What is encapsulation in PHP?

A). Hiding data implementation details

B). Exposing data publicly

C). Implementing interfaces

D). Inheriting properties

Which of the following is an advantage of inheritance in PHP?

A). Increases code reusability

B). Decreases code maintainability

C). Adds complexity to the code

D). Makes code less modular

In PHP, what is the default visibility of class members?

A). Public

B). Protected

C). Private

D). Global

Which access modifier in PHP restricts access to class members?

A). public

B). protected

C). private

D). access

Which keyword is used to access parent class properties in PHP?

A). parent

B). super

C). this

D). self

What does the protected access modifier mean in PHP?

A). Access to all

B). Access to parent class

C). Access to subclass

D). Restricted access

What keyword is used in PHP to implement inheritance?

A). extends

B). implements

C). inherits

D). inherits_from

What does the final keyword do when applied to a method in PHP?

A). Mark as deprecated

B). Prevent override

C). Define as abstract

D). Enable instantiation