Question Bank

Why is it important NOT to rely solely on color to convey meaning or state?

When should you use 'aria-live="assertive"' versus 'aria-live="polite"'?

What is the difference between an empty alt attribute (alt="") and a missing alt attribute for an image?

Which techniques can be used to hide content from specific groups of users?

What is a 'focus trap' and when is it necessary?

Why are relative units like 'rem' or 'em' preferred over 'px' for setting font sizes?

What is the 'Accessibility Tree'?

In WCAG compliance levels, what is the key difference between A, AA, and AAA?

What are 'skip links' and why are they used on websites?

Who benefits from the implementation of web accessibility?

What types of streams are available in Node.js and what are their specific roles?

What is the primary purpose of the Buffer class in Node.js?

Why are synchronous methods like fs.readFileSync() generally discouraged in Node.js web server applications?

In the 'http' module, which method is used to initialize a server and define a request listener?

Which core Node.js module is used to perform file system operations such as reading and writing files?

What information is typically found in a package.json file?

Which files are used by npm and yarn to ensure deterministic, consistent package installations across different machines?

What are the primary functions of NPM (Node Package Manager)?

Which command-line based version manager is commonly used to update and switch between Node.js versions?

In a non-blocking I/O model, the application thread must stop and wait for a file read operation to complete before continuing with other tasks.