I'd been living in Syria for six months and was really nervous about getting questioned but had no problem at all.
If you don't give them anyting to be concerned about then it's not a problem.
We were asked where we were going: Jerusalum (sorry about the spelling!)
How long: About a week
Why: Tourism.
We were mostly going to Palestine and were going to be truthful about it at the boarder, but we met a woman who had been working there for years for an NGO and said Absolutely do not mention Palestine, only say you're going to Israel.
We met a man at the hostel in Amman who told the boarder girls that he was going to Palestine and was a bit rude about being questioned about it - he was refused entry.
They never asked me about Syria or Lebanon though.