Certified Internet Web (CIW) Professional Practice Exam

The method employed in JavaScript to parse a JSON string into an object is JSON.parse(). This function takes a JSON-formatted string as input and converts it into an equivalent JavaScript object, making it easier to work with data that is received in JSON format, such as from an API.

JSON.parse() ensures that the string follows the correct JSON syntax and structure. If the string is valid, the method will successfully parse it and provide the corresponding JavaScript object. This functionality is essential for developers who need to handle data exchange in web applications.

The other options provided do not fulfill the requirement of parsing JSON strings into objects. For instance, JSON.stringify() is used to convert a JavaScript object into a JSON string rather than the other way around. JSON.decode() and JSON.toObject() are not standard JavaScript methods. Therefore, understanding the purpose and function of JSON.parse() is critical for effectively managing JSON data in JavaScript programming.