Web Programming Web Programming 5

Question 1

What is the purpose of the 'localStorage' API in web browsers?

Accepted Answer

Persists key-value data in the browser with no expiration

Answer

localStorage stores string key-value pairs in the browser persistently, surviving page reloads and browser restarts until explicitly cleared.

Question 2

In CSS, which value of 'position' removes an element from the normal document flow and positions it relative to the viewport?

Accepted Answer

fixed

Answer

position: fixed removes the element from document flow and fixes its position relative to the browser viewport, so it stays visible when scrolling.

Question 3

What does the spread operator (...) do in JavaScript?

Accepted Answer

Expands an iterable into individual elements

Answer

The spread operator expands an iterable such as an array or object into its individual elements in contexts like function calls or array literals.

Question 4

Which of the following best describes a Single Page Application (SPA)?

Accepted Answer

A web app that loads one HTML page and dynamically updates content without full page reloads

Answer

SPAs load a single HTML shell and update the DOM dynamically via JavaScript, avoiding full page reloads for faster navigation.

Question 5

What is the purpose of an API key in web development?

Accepted Answer

Authenticates and identifies the application making API requests

Answer

An API key is a unique identifier passed in requests to authenticate the calling application and control access to an API.

Web Programming Practice Test