Data Architect Question:

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Tell me what is junk Dimension?

Data Architect Interview Question
Data Architect Interview Question

Answer:

It is a dimension table comprising of attributes that don’t have a place in the fact table or in any of the current dimension tables. Generally, these are the properties like flags or indicators. For example, it can be member eligibility flag set as ‘Y’ or ‘N’ or any other indicator set as true/false, any specific comments, etc. if we keep all such indicator attributes in the fact table then its size gets increased. So, we combine all such attributes and put in a single dimension table called as junk dimension having unique junk IDs with a possible combination of all the indicator values.

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Can you throw some light on your experience in Data Modelling with respect to projects you have worked on till date?Tell us what are the different types of measures?