Call it a chat, then. Chatting is perhaps the fastest way to get to know someone and discover what they're interested in. And working with them is the best way to see if they're up to the job.
Testing is unpleasant and it doesn't work anyhow, IMO.
Testing is unpleasant and it doesn't work anyhow, IMO.
Edit: However, there are edge cases where testing could provide more accurate results - for example, a socially-inept person, may be too nervous to talk in person, but could pass the test with a good results.
Depth of knowledge, for example, depends on the connections one forms with other areas of knowledge.