To my eyes, those two comes up with the way I feel are the best.

One from Phil Factor:

https://www.simple-talk.com/blogs/2009/01/22/technical-interviews-and-tests-have-got-to-stop/]

And the other from Grant Fritchey (Half DBA oriented):

http://www.scarydba.com/2012/09/24/interviewing-a-dba/

You get a call from one of the business people. They tell you that the database is running slow. What do you do?

That get a lot information out of the person in front of you.

Both refers on the solving skills and the approach someone take in front of a problem rather than evaluating skills which a parser does more accurately than most human can ever does or remember tons of specific pages of precise syntax like google and msdn does better than any human...

Finally, there's the "human" side which I feel is mandatory. A great working environment is very important and I look forward to positive type of people.

You got those three, for me you're amongst the best people there is.

In short, you got some skills, if you don't, you will be able to get the info you need to get it done and being positive brings a great value for teamwork and as a general way of life that I like.

my 2 cents