Why would a developer use Union Types in PHP 8?

To allow variables to accept multiple types

Consider this class: class Car { public string $color; public function getColor(): string { return $this->color; } } //Which statement correctly assigns and accesses the color?

$car->color = "red"; echo $car->getColor();

$car = Car("red"); echo getColor();

color = red; echo $car.getColor();

Why is the $this keyword used in a class method?

To refer to the current object instance

Given the class definition: class Dog { public function bark() { return "Woof!"; } } //How do you call the bark() method?

$dog = new Dog(); echo $dog->bark();

In OOP, which of the following best describes an object?

An instance of a class with properties and methods

You want to represent a book with title and author, and print a message like "Title by Author". What OOP elements should you use?

Class with properties and a method

Which of the following best describes a property in a class?

A variable that belongs to an object

What is inheritance in PHP OOP?

A class inheriting properties and methods from another class

A function calling another function

An object creating another object

What is the purpose of the parent::__construct() statement?

To call the parent class constructor

Which of the following is an example of polymorphism in PHP?

Multiple classes implementing the same interface

Using multiple constructors in a class

In the code below, what does the getDetails() method in Car do? public function getDetails(): string { return parent::getDetails() . " with $this->doors doors"; }

Calls the Vehicle class's getDetails method and adds door info

In the following code: class Circle implements Shape { public function area(): float { return pi() * $this->radius * $this->radius; } }//What interface requirement must the class fulfill?

It must define the area() method

It must define a calculate() method

It must implement a parent class

What does the implements keyword signify in PHP?

The class adheres to the interface definition

The class extends another class

The class overwrites properties

What happens if a class claims to implement an interface but does not define all its methods?

The program runs with a warning

PHP will silently skip the methods

The missing methods will be automatically added

Given: interface Shape { public function area(): float; }//Which of the following class definitions correctly implements the interface?

class Circle implements Shape { public function area(): float { return 3.14; } }

class Square { public function draw() {} }

class Triangle implements Shape { public function draw() {} }

class Rectangle { public function area() {} }

Why would a developer use inheritance?

To reuse and extend existing code

To convert properties into strings

In this code: class Car extends Vehicle { public int $doors; }//What does extends Vehicle imply?

Car inherits Vehicle's properties and methods

Which of the following shows runtime polymorphism?

Two classes implementing the same interface and using it in a single function

Defining functions inside a loop

What OOP concept(s) does this code demonstrate? interface PaymentMethod { public function pay(float $amount): string; } class CreditCard implements PaymentMethod { public function pay(float $amount): string { return "Paid $amount using Credit Card"; } } class PayPal implements PaymentMethod { public function pay(float $amount): string { return "Paid $amount using PayPal"; } } function processPayment(PaymentMethod $method, float $amount) { echo $method->pay($amount); } $card = new CreditCard(); $paypal = new PayPal(); processPayment($card, 100.00); processPayment($paypal, 50.00);

Both Inheritance and Polymorphism

What OOP concept(s) does the code below demonstrate? class Vehicle { public string $brand; public function __construct(string $brand) { $this->brand = $brand; } public function getBrand(): string { return $this->brand; } } class Car extends Vehicle { public int $doors; public function __construct(string $brand, int $doors) { parent::__construct($brand); $this->doors = $doors; } public function getCarInfo(): string { return $this->getBrand() . " with " . $this->doors . " doors"; } } $myCar = new Car("Toyota", 4); echo $myCar->getCarInfo();

Both Inheritance and Polymorphism

PHP 8 OOP Quiz

Quiz

•

Information Technology (IT)

•

Professional Development

•

Practice Problem

•

Medium

Cecilio Salonoy

Used 2+ times

FREE Resource

Error

Float

Create a free account and access millions of resources

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

35 questions

Computer Science Quiz

Quiz

•

Professional Development

35 questions

IT Systems and Tools Quiz

Quiz

•

Professional Development

43 questions

OSE - Chapter 12 Quiz 01

Quiz

•

Professional Development

40 questions

PRELIMS IT ERA

Quiz

•

Professional Development

38 questions

Java Fundamentals - Seção 2 (Alice 3)

Quiz

•

Professional Development

40 questions

PPPK TEKNIS TIK 5

Quiz

•

Professional Development

Popular Resources on Wayground

10 questions

Forest Self-Management

Lesson

•

1st - 5th Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

30 questions

Thanksgiving Trivia

Quiz

•

9th - 12th Grade

30 questions

Thanksgiving Trivia

Quiz

•

6th Grade

11 questions

Would You Rather - Thanksgiving

Lesson

•

KG - 12th Grade

48 questions

The Eagle Way

Quiz

•

6th Grade

10 questions

Identifying equations

Quiz

•

KG - University

10 questions

Thanksgiving

Lesson

•

5th - 7th Grade

Discover more resources for Information Technology (IT)

20 questions

HS2C2 AB QUIZIZZ

Quiz

•

1st Grade - Professio...

PHP 8 OOP Quiz

38 questions

What is one of the main advantages of PHP 8 over its previous versions?

Which feature allows passing arguments based on parameter names in PHP 8?

What is a class in PHP OOP?

What keyword is used to create a class instance?

What is the output of this code? $car = new Car("red", "Toyota"); echo $car->getDescription();

What is the purpose of the __construct method in a class?

Given this code snippet: function foo(int|float $value): int|float { return $value; } echo foo(3.5); //What will be the output?

Why would a developer use Union Types in PHP 8?

Consider this class: class Car { public string $color; public function getColor(): string { return $this->color; } } //Which statement correctly assigns and accesses the color?

You need to create multiple objects with different properties from a single template. Which concept applies?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Information Technology (IT)