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

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

What is the purpose of the interface keyword in PHP?

A). Finalize a class

B). Define a contract

C). Abstract a class

D). Create a subclass

Which of the following is NOT a principle of OOP?

A). Inheritance

B). Polymorphism

C). Abstraction

D). Linearity

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

How is polymorphism achieved in PHP?

A). Method overriding

B). Method overloading

C). Method inheritance

D). Method encapsulation

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 keyword is used in PHP to implement inheritance?

A). extends

B). implements

C). inherits

D). inherits_from

What is the purpose of method overloading in PHP?

A). Different parameters

B). Same parameters

C). Override a method

D). Access private methods

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

A). this

B). parent

C). self

D). static