Shivakumar:
if your target audience is on Twitter, and you have either a good following (@SAP handle?) or money to promote the tweet with your survey, it can work.
I'd still have the survey on SurveyMonkey, have an attractive teaser for the Tweet and point people to the survey. 4-5 questions is too much for Twitter, unless you create a large scale campaign.
You could promote a prize drawing for something among the people who complete the survey, but then you either have to make sure you don't hit the right people or have a prize that is only interesting to your target audience; or you'll get a lot of useless responses.
There needs to be some intrinsic or extrinsic motivation for people to participate. Depending on your survey, you could promise to share the results back to the people participating...
Good luck, let me know how it goes,
Natascha