Most large companies house their data in multiple data warehouses. Thinking of one of your more complex analytical projects, how many data warehouses did you have to query to gather all the required data?
The technical complexity of your work as a data analyst may vary depending on the size of the companies you have previously worked at. Strong technical skills are an important attribute of a data analyst's background. Having experience retrieving data from multiple data warehouses demonstrates your understanding of databases, data structures, and programming languages.
"In the larger companies I have worked at as a data analyst, I have had to work with multiple data warehouses to retrieve the appropriate data. For a particular corporate-wide initiative, I queried against four different data warehouses. Once I retrieved the records and variables I needed, I built one large dataset I worked off of to complete my analysis."
This is an operational question that the interviewer uses to determine how you go about performing the duties required by this job. This specific question gives them an idea of the scope of work you've done in your previous roles. Keep your answer brief and to the point when responding to operational questions. The interviewer will ask you a follow-up question if they need additional information.
