HTML5 HTML5 Web Storage and APIs

Question 1

Which HTML5 Web Storage object stores data with no expiration date, persisting even after the browser is closed?

Accepted Answer

localStorage

Answer

localStorage stores key-value pairs with no expiration, persisting across browser sessions until explicitly cleared.

Question 2

What is the difference between localStorage and sessionStorage?

Accepted Answer

localStorage persists until cleared; sessionStorage clears when the tab closes

Answer

sessionStorage data is cleared when the browser tab or window is closed, while localStorage data persists indefinitely until explicitly removed.

Question 3

Which method is used to store a value in localStorage?

Accepted Answer

localStorage.setItem(key, value)

Answer

The setItem(key, value) method stores a key-value pair in the localStorage object.

Question 4

What does the Geolocation API's getCurrentPosition() method do?

Accepted Answer

Retrieves the device's current geographic coordinates asynchronously

Answer

getCurrentPosition() asynchronously requests the device's current position and passes the coordinates to a success callback.

Question 5

Which HTML5 API enables communication between a web page and a server without page reload?

Accepted Answer

All of the above

Answer

XMLHttpRequest, the Fetch API, WebSocket, and Server-Sent Events all allow web pages to communicate with servers without a full page reload.

HTML5 - HTML5 Web Development Practice Test