Quiz: Reviewing JavaScript Inheritance

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Reviewing JavaScript Inheritance

?:

class Animal {
  constructor(name) {
    this.name = name;
  }
  eats() {
    return `${this.name} is eating!`
  }
}
class Mammal {
  constructor(name) {
    this.name = name;
  }
  sleeps() {
    return `${this.name} is sleeping!`
  }
}
class Rabbit extends Mammal {
  //...
} 
let animal = new Animal("Ringo");
let mammal = new Mammal("Wilbur");
let rabbit = new Rabbit("Jabby");

Which function will not output “[Name] is sleeping!”

( ) None of the above ( ) mammal.sleeps() (X) animal.sleeps() ( ) rabbit.sleeps()

?: The accepted functionality of extend is to build new functionality into the inherited method:

( ) True (X) False

?:

class Animal {
  constructor(name) {
    this.name = name;
  }
  eats() {
    return `${this.name} is eating!`
  }
}
class Rabbit extends Mammal {
  constructor(name, color) {
    //..
  }
}

What is the correct way to have the constructor for rabbit inherit the name property?

( ) this.name = name; (X) super(name); ( ) this.name = super(name); ( ) super(name) = name;

?: What keyword does JavaScript provide for directly working with a parent class constructor and inherited methods?

(X) super ( ) extends ( ) class ( ) constructor

?:

class Vehicle {
  constructor( make ) {
    this._make = make
  }

  get make() {
    return this._make
  }

 static definition() {
    return 'A vehicle is used for transporting people or goods, especially on land.'
  }
}

class Car extends Vehicle {
  constructor( make , driveTrain ) {
    super( make )
    this._driveTrain = driveTrain
  }

  static definition() {
    return `${super.definition()} A car is a road vehicle, typically with four wheels, powered by an internal combustion engine and able to carry a small number of people.`
  }
}

What is the correct way to have the car utilize the inherited static method of definition?

( ) ${definition()} a road vehicle, typically with four wheels, powered by an internal combustion engine and able to carry a small number of people. ( ) ${this.definition()} a road vehicle, typically with four wheels, powered by an internal combustion engine and able to carry a small number of people. ( ) ${super.definition()} + a road vehicle, typically with four wheels, powered by an internal combustion engine and able to carry a small number of people. (X) ${super.definition()} a road vehicle, typically with four wheels, powered by an internal combustion engine and able to carry a small number of people.

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