Which HTML segment should a developer use to enable the Offline AppCache application interface (API)?A)B)C)D)
Answer(s): B
The correct HTML segment to enable the Offline AppCache application interface (API) is by specifying the manifest attribute in the <html> tag.AppCache Manifest: The manifest attribute in the <html> tag is used to specify the URL of the AppCach
Which method retrieves periods updates about the geographic location of a user:
Answer(s): D
The watchPosition method in the Geolocation API is used to get periodic updates about the geographic location of a user.watchPosition Method: This method calls the provided callback function with the user's current position as the device's location changes.Usage Example:navigator.geolocation.watchPosition(function(position) {console.log("Latitude: " + position.coords.latitude + ", Longitude: " + position.coords.longitude);});In this example, the watchPosition method continuously logs the user's latitude and longitude to the console as the position changes.
MDN Web Docs on watchPositionW3C Geolocation API Specification
A file named application, Appchache contains the following content:Which attribute should a developer set to application. Appchache so the four files will be cached?
Answer(s): C
To specify a cache manifest file for an HTML document, the manifest attribute must be set in the <html> element. This attribute tells the browser to cache the files listed in the manifest for offline use.Cache Manifest:Purpose: Specifies resources that should be cached by the browser.Attribute: manifest is used in the <html> tag to link the cache manifest file.Example:Given the manifest file application.appcache:CACHE MANIFESTCACHE:default.html stylesheet.css functions.js logo.jpgHTML with the manifest attribute:<html manifest="application.appcache">...</html>
MDN Web Docs - Offline Web applicationsW3C HTML5 Specification - manifest attribute
What should be used to request and Update data in the background?
AJAX (Asynchronous JavaScript and XML) is used to request and update data in the background without reloading the web page.AJAX Overview:Purpose: Allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes.Benefits: Provides a smoother user experience by avoiding full page reloads.Example:Using XMLHttpRequest:var xhr = new XMLHttpRequest();xhr.open("GET", "data.json", true);xhr.onreadystatechange = function() {if (xhr.readyState === 4 && xhr.status === 200) {var data = JSON.parse(xhr.responseText);console.log(data);}};xhr.send();
MDN Web Docs - AJAXW3Schools - AJAX Introduction
Which tag is required when importing the jQuery library?
The <script> tag is required when importing the jQuery library into an HTML document.Including jQuery:Purpose: The <script> tag is used to embed or reference executable code (JavaScript).Example:<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>The <script> tag should be placed in the <head> or at the end of the <body> to ensure that the library is loaded before the scripts that depend on it.
jQuery Getting StartedMDN Web Docs - <script>
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