Salesforce JavaScript Developer Practice Exam

What does the `Object.create` method do in JavaScript?

1. Creates a new object with the specified prototype object and properties

2. Clones an object

3. Sets an object's prototype to null

4. Creates an object from a JSON string

The correct answer is: Creates a new object with the specified prototype object and properties

The `Object.create` method in JavaScript is designed to create a new object, using an existing object as the prototype for the new object. This allows developers to set up a simple inheritance chain, where the newly created object inherits properties and methods from the prototype object. The method can also accept a second optional parameter that allows you to define additional properties on the new object, including their descriptors (such as value, writable, enumerable, and configurable). The significance of using `Object.create` lies in its capability to establish prototypal inheritance. This method is particularly useful when you want to create an object that shares behavior with another object without having to explicitly define those properties again. By specifying a prototype object, the new object can access properties and methods from the prototype as if they were its own. Other options provided do not accurately describe the functionality of `Object.create`. For instance, cloning is a different process, typically achieved via methods such as `Object.assign()` or using the spread operator. Setting an object's prototype to null or creating an object from a JSON string each represent distinct operations that do not align with the purpose of the `Object.create` method. In summary, `Object.create` is fundamentally about creating a new object with a defined prototype