Modern JavaScript from the Beginning - Second Edition - Using Object.create()

The video tutorial introduces an alternate method for creating objects in JavaScript using the Object.create method. It begins by explaining the traditional constructor function approach and then demonstrates how to define prototype functions for a rectangle object. The tutorial shows how to use Object.create to instantiate new rectangle objects with specified properties and methods, such as area and perimeter calculations. The video concludes with a brief overview of prototypical inheritance and a preview of the next topic.

What is the purpose of using an object literal in the context of creating prototypes?

• To define a set of methods that can be shared across instances.

• To create a new instance of an object.

• To execute a function immediately.

• To store data temporarily.

Which method is used to calculate the area in the rectangle prototype?

• this.width + this.height

• this.width * this.height

• 2 * (this.width + this.height)

• this.width / this.height

What does the 'is square' method check in the rectangle prototype?

• If the width is not equal to the height

• If the width is greater than the height

• If the width is less than the height

• If the width is equal to the height

What is the role of Object.create in creating new objects?

• It merges two objects into one.

• It updates the properties of an object.

• It deletes an existing object.

• It creates a new object with a specified prototype.

How do you specify properties when using Object.create?

• By listing them in a function

• By providing an object with key-value pairs

• By using an array of values

• By passing them as a string

What is the output when calling the area method on a rectangle object with width 10 and height 20?

• 200

• 400

• 300

• 100

What is the result of calling the 'is square' method on a rectangle object with width 20 and height 20?

• True

• False

• Undefined

• Error