16. What is the purpose of the interface keyword in PHP?

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

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

What is the main purpose of encapsulation?

A). To make classes more readable

B). To hide implementation details

C). To increase code complexity

D). To prevent inheritance

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

In PHP, what is the purpose of the abstract keyword?

A). To specify a class as final

B). To specify a class as abstract

C). To prevent a class from being instantiated

D). To mark a method as deprecated

Which of the following is NOT a principle of OOP?

A). Inheritance

B). Polymorphism

C). Abstraction

D). Linearity

Which keyword is used to access static properties or methods in PHP?

A). this

B). parent

C). self

D). static

What keyword is used in PHP to implement inheritance?

A). extends

B). implements

C). inherits

D). inherits_from

What is the benefit of using polymorphism in PHP?

A). Increased complexity

B). Improved readability

C). Decreased flexibility

D). Increased maintainability

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

A). Public

B). Protected

C). Private

D). Global