Classes & Objects

Preview — 3 of 10 questions

Which keyword is used to define a class in JavaScript?

javascript

class Person {
  constructor(name) {
    this.name = name;
  }
}

Afunction

Bclass

Cobject

Dconstructor

How do you create an object from a class?

javascript

class Car {
  constructor(brand) {
    this.brand = brand;
  }
}

let myCar = ______;

Anew Car("Toyota");

BCar.new("Toyota");

Ccreate Car("Toyota");

DCar("Toyota");

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

javascript

class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }
}

const p = new Person("Alice", 30);
console.log(p.name); // "Alice"
console.log(p.age);  // 30

ATo define static properties

BTo initialize object properties

CTo call parent class methods

DTo create private methods

Answer all 10 questions (7 more), see explanations for every answer, and track your score.