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The answer to several questions will tell you a lot about a corporate culture.
1) What is the company's employee turnover rate ?
2) What is the average tenure for their employees?
3) What percentage of the promotions are from within?
4) What is the demographic mix of their management and executive team?
5) Do they invest in their employees ( eg seminars, tuition aide)?
Once these questions are answered you will have a very clear picture of what the work culture is like and if you think it is a good fit for your work style.