Online Quiz Attempt – Play & Test Your Knowledge

Question 1

1 / 10

Which of the following is NOT a valid visibility keyword in PHP OOP?

A

public

B

private

C

protected

D

friend

Question 2

2 / 10

What is the purpose of the `final` keyword in PHP OOP?

A

To prevent a class from being instantiated.

B

To prevent a method from being overridden.

C

To define a constant value.

D

To declare a static variable.

Question 3

3 / 10

What does the term 'SOLID' stand for in OOP principles?

A

Simple, Open, Logical, Intuitive, Dependable

B

Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion

C

Structured, Object-Oriented, Layered, Intelligent, Detailed

D

Standard, Optimized, Logical, Integrated, Dynamic

Question 4

4 / 10

Which of the following is the correct way to define an abstract method in PHP?

A

abstract public function myMethod() {}

B

public abstract function myMethod();

C

abstract function myMethod() {}

D

abstract public function myMethod();

Question 5

5 / 10

What is the purpose of the `instanceof` operator in PHP?

A

To check if a variable is initialized.

B

To check if a class exists.

C

To check if an object is an instance of a specific class or interface.

D

To check if a method exists.

Question 6

6 / 10

What is the difference between an interface and an abstract class in PHP?

A

An interface can have method implementations, while an abstract class cannot.

B

An abstract class can have properties, while an interface cannot.

C

An interface can extend multiple interfaces, while an abstract class can extend only one class.

D

There is no difference; they are interchangeable.

Question 7

7 / 10

What does 'late static binding' refer to in PHP?

A

Binding static methods to their class at compile time.

B

Binding static properties to their class at runtime.

C

Referencing the class in the hierarchy that was used to call a static method.

D

Preventing static methods from being overridden.

Question 8

8 / 10

Which of the following design patterns promotes loose coupling between objects?

A

Singleton

B

Factory

C

Dependency Injection

D

Adapter

Question 9

9 / 10

What is the purpose of the `__call()` magic method in PHP?

A

To handle the construction of an object.

B

To handle calls to undefined methods.

C

To handle the destruction of an object.

D

To handle calls to private methods.

Question 10

10 / 10

In PHP, what is a 'trait' primarily used for?

A

Defining interfaces.

B

Implementing multiple inheritance.

C

Creating abstract classes.

D

Defining constants.

PHP Object-Oriented Programming