title: Object Oriented Design Practice Problems
body: <p>I've been developing almost exclusively C-code for the past few years.  I'm currently looking to brush up on my Object Oriented Design skills.  Can anyone recommend any resources that have a decent set of short object-oriented design problems with some possible solutions/analysis?  I'd ideally like something that was a small enough problem to sketch out and design in during a question in an interview that can be completed/analyzed in 15-30 minutes.</p>
  
  <p>Thanks!</p>