| What this mean in qlikview certification. |
It means you have to answer the question correctly or you won't get the points for it.
You have to understand why different actions have different effects on your data model with respect to performance, accuracy etc.
What happens when you join tables? Are there alternatives to joining tables? When would you use them? Why?
What is a synthetic key? Why is it created? Is it a problem? How can you prevent a synthetic key?
What is a cyclic reference? Why is it created? Is it a problem? How can you prevent it?
What is a slowly changing dimension? How can you handle a SCD in the model? What are the alternatives? Why would you choose one over the other?
When do you choose to concatenate tables? Why? What are the alternatives? What are the trade offs between them?
When would you use a Link table? Why? What are the alternatives?
...
etc
talk is cheap, supply exceeds demand
