Applied as a dev, interviewed as a DBA
A few years ago I applied for a job that I didn't really want but was paying a lot so thought I'd sound it out at least. I'm a c# dev, but it turns out they really wanted a DBA. I had a fair bit of SQL Server experience, but not much from the DBA side, but thought what the hell, I'll do their tech test.
So I had a quick Google for DBA test questions, picked the first link, and boned up on my knowledge. I quickly realised I didn't really know enough to be a DBA, but I learned a bit.
Anyway, I get to the test, and discover it was the exact same one I had been looking at online. They had literally just nicked it and presented it as their own. Therefore I knew all the answers and got a perfect score.
They admitted they were actually quite surprised about how I did given I got higher scores than all the actual DBAs who applied, and I ended up on a phone interview with their lead DBA and somehow got through that as well.
Then the manager left and the new one came in a couple of weeks later and gave me a call to say that really they wanted a c# guy.... I gave up at that point as I didn't really want the job anyway.