Challenge your skills on working with JSON data and making API calls using jQuery. Assess your knowledge of AJAX methods, data parsing, and best practices in handling dynamic content within web applications.
Which jQuery method is typically used to send an asynchronous GET request to a remote API and handle the JSON response?
Explanation: The correct answer is $.getJSON(), as it is specifically designed for sending GET requests and automatically parsing JSON responses. Options like $.fetchJSON() and $.ajaxJSON() are not valid jQuery methods, though they sound similar. $.sendJSON() might seem plausible but does not exist in the jQuery library. Thus, only $.getJSON() accurately fulfills the described purpose.
When receiving a JSON string from a server response in jQuery, which function should you use to convert it into a JavaScript object, assuming it is not parsed automatically?
Explanation: JSON.parse() is the native JavaScript function used to convert a JSON string into a JavaScript object. stringifyJSON() and JSON.convert() are not standard functions in JavaScript or jQuery. jQuery.parseString() is also incorrect because jQuery does not provide this method. JSON.parse() is the right and most reliable choice for parsing JSON strings.
If you want to submit new data to a server-side API using jQuery, which type of HTTP request should you typically use?
Explanation: POST is the standard HTTP method for sending new data to the server, such as submitting a form or creating a new resource via an API. GET is mainly used for retrieving data, not sending it. DELETE is used for removing data, and TRACE is not intended for API data submissions but rather for diagnostic purposes. Thus, POST is the proper choice for submitting new data.
In a typical jQuery AJAX request, which parameter should you use to process data only after a successful response is received from the API?
Explanation: The 'success' parameter is designated for executing a function when the AJAX call completes successfully, providing access to the returned data. beforeSend is called before the request is sent, error handles failed requests, and complete runs after the request finishes, regardless of outcome. Therefore, 'success' ensures your code only runs upon a successful response.
Suppose a JSON API returns an array of user objects, and you want to display each user's name using jQuery. Which jQuery method is most appropriate for iterating over each object in the array?
Explanation: $.each() is the correct method for iterating over arrays or objects in jQuery, allowing access to each item for processing or display. $.map() can transform arrays but isn't best for simply iterating and displaying items. $.list() and $.iterate() are not valid jQuery methods, even though their names may sound plausible. Thus, $.each() is ideal for this use case.