Asynchronous JavaScript Quiz

To pass the quiz, you must correctly answer at least 18 of the 20 questions below. # --quizzes-- ## --quiz-- ### --question-- #### --text-- What is asynchronous programming? #### --distractors-- A method for executing code sequentially. --- A technique to handle errors in your code. --- A way to make network requests, typically to retrieve or send data to the server. #### --answer-- A method to execute code concurrently without blocking the main thread. ### --question-- #### --text-- What is a thread? #### --distractors-- A function used to retrieve data from the server. --- A program that executes JavaScript code in a web browser. --- A special type of function that is passed as an argument to another function. #### --answer-- A sequence of instructions that can be executed independently of the main program flow. ### --question-- #### --text-- What is the purpose of the Fetch API in JavaScript? #### --distractors-- To manage asynchronous callbacks. --- To create and manage cookies. --- To render dynamic HTML content. #### --answer-- To make network requests to servers. ### --question-- #### --text-- Which HTTP method is used to send data to a server for processing? #### --distractors-- `GET` --- `DELETE` --- `HEAD` #### --answer-- `POST` ### --question-- #### --text-- Which of the following is the correct way to fetch data from an API? #### --distractors-- ```js fetch('https://api.example.com/data') .accept(response => response.json()) .accept(data => console.log(data)) ``` --- ```js fetch('https://api.example.com/data') .allow(response => response.json()) .allow(data => console.log(data)) ``` --- ```js fetch('https://api.example.com/data') .send(response => response.json()) .send(data => console.log(data)) ``` #### --answer-- ```js fetch('https://api.example.com/data') .then(response => response.json()) .then(data => console.log(data)) ``` ### --question-- #### --text-- What is a promise in JavaScript? #### --distractors-- A way to synchronize multiple operations when working with the Fetch API. --- A special type of callback function that you must use in all higher order functions. --- A technique used to handle errors when you work with the Fetch API. #### --answer-- An object that represents the eventual completion (or failure) of an asynchronous operation. ### --question-- #### --text-- What does promise chaining allow you to do? #### --distractors-- Allows you to execute multiple synchronous operations in parallel. --- Allows you to handle synchronous operations more efficiently. --- Allows you to retry failed operations automatically. #### --answer-- Allows you to perform a sequence of asynchronous operations one after the other. ### --question-- #### --text-- Which method is used to handle a successful completion of a promise? #### --distractors-- `.finally()` --- `.catch()` --- `.error()` #### --answer-- `.then()` ### --question-- #### --text-- Which method is used to handle errors in a promise chain? #### --distractors-- `.finally()` --- `.then()` --- `.error()` #### --answer-- `.catch()` ### --question-- #### --text-- Which of the following is NOT a valid HTTP method? #### --distractors-- `PUT` --- `GET` --- `POST` #### --answer-- `SEND` ### --question-- #### --text-- Which of the following is the correct syntax for creating an async function? #### --distractors-- `function myFunction() {}` --- `function async myFunction() {}` --- `async {} => ()` #### --answer-- `async function myFunction() {}` ### --question-- #### --text-- What does the `await` keyword do in an async function? #### --distractors-- It creates a new promise. --- It executes code immediately without waiting and returns an object. --- It logs the result of the promise and returns `null`. #### --answer-- It pauses the execution of the function until the promise is resolved. ### --question-- #### --text-- Which of the following APIs is used to provide a way for websites to request the user's location? #### --distractors-- Locator API --- Geo API --- Locate API #### --answer-- Geolocation API ### --question-- #### --text-- Which of the following attributes downloads the script asynchronously but waits for the HTML document to be fully parsed before running the script? #### --distractors-- `asyncDefer` --- `deferred` --- `deferring` #### --answer-- `defer` ### --question-- #### --text-- What will the following code return? ```js fetch('https://api.example.com/data') ``` #### --distractors-- An error saying that the data is corrupted. --- An error saying that the data cannot be fetched. --- Nothing will be returned and JavaScript will move to the next function in the script. #### --answer-- A `Promise` that resolves to a `Response` object. ### --question-- #### --text-- What is the default HTTP method for the Fetch API? #### --distractors-- `POST` --- `PUT` --- `DELETE` #### --answer-- `GET` ### --question-- #### --text-- Which of the following methods is used to delete resources on the server? #### --distractors-- `REMOVING` --- `REMOVE` --- `DELETING` #### --answer-- `DELETE` ### --question-- #### --text-- Which of the following is the correct way to create a promise? #### --distractors-- ```js const promise = get Promise((resolve, reject) => { setTimeout(() => { resolve('Data received successfully'); }, 2000); }); ``` --- ```js const promise = set Promise((resolve, reject) => { setTimeout(() => { resolve('Data received successfully'); }, 2000); }); ``` --- ```js const promise = put Promise((resolve, reject) => { setTimeout(() => { resolve('Data received successfully'); }, 2000); }); ``` #### --answer-- ```js const promise = new Promise((resolve, reject) => { setTimeout(() => { resolve('Data received successfully'); }, 2000); }); ``` ### --question-- #### --text-- Which of the following attributes tells the browser to download the script file asynchronously while continuing to parse the HTML document? #### --distractors-- `resolve` --- `catch` --- `put` #### --answer-- `async` ### --question-- #### --text-- Which method of the Geolocation API is used to get the current position of a device? #### --distractors-- `getLocation()` --- `getPosition()` --- `getLatLong()` #### --answer-- `getCurrentPosition()`