There are a number of problems with this approach. It's difficult to standardize so personal biases are more likely to creep in. I've asked this question in in

There are a number of problems with this approach. It's difficult to standardize so personal biases are more likely to creep in. I've asked this question in interviews a number of times, but it's primarily to gauge communication skills rather than technical skills. The biggest problem with using it as a technical screen is that candidates are really bad at choosing a project to tell you about. I've had candidates choose as their problem building out some responsive dynamic front end and their entire solution boils down to, I picked Angular and Bootstrap.