If you are planning to answer in an interview then I would suggest going through proper example and scenarios.
To me it seems Interviewers are not just looking for definitions they look for the best use of a feature or technique.
For example if someone asks you the difference between Concatenation and Join then you better have to explain the scenarios where you considered Join than concatenation or vice versa.
So your decision for opting one technique over another should be well explained in your answer. All the best.
And you should specially thank to Deepak and other folks who have gathered so many variety of good QlikView questions which has helped interviewers and candidates as well.
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