[user5994461]

When you have hundreds of people to interview, the quantity is a huge problem. You can't interview the majority of them.

His question takes away the people who are not interested. It's useful.

[davehtaylor]

It also seems to remove the people who may or may not actually understand the fundamentals of the language they claim to have experience in, rather only knowing how to cobble together frameworks and/or copypasta code.