You should be able to get some real world case from your past experience..
Such as when working on a specific problem in your domain, there is a very
challenging task, all others have tried but not been able to pull off. But
you never give up, and think out of the box, question the assumption.
Eventually you found a solution that could get the job done. This type of
questions is very typical of aptitude and behavior since it tries to check
if you can handle tough situations, you can work under pressure from both
the work and peers. I personally like this kind of questions a lot since you
can market yourself so much in this question with the following:
Persistence
Hard working
Team work
Out-of-box thinking
Leadership
Customer focused
Save company face and money
Time management
Being a shipper (rather than a dreamer )
....
HTH.