Senior Front End Developer Interview Question:

Tell us how are you keeping up with the latest developments in web development?

Submitted by: Muhammad

In other words, this will determine if your candidate continues to learn programming and makes the effort to stay on top of his skills. You can ask your candidate about their favorite programming-related Twitter accounts and why they like it, for example. If your candidate doesn't use Twitter, ask which tech publications they read and authors or personalities in the dev world they admire and why.

Web development is always changing, so being curious about the latest trends and forming opinions about them is typicially a good sign.
Submitted by: Muhammad