As an experienced data analyst, you have many different processes and procedures you use in your work. You should review these before the interview at Morningstar to keep them at the top of your mind. During the interview, they'll likely ask many questions about how you do this job. As with any operational question, keep your answer brief and to the point, and always anticipate a follow-up question.

"I use several techniques to identify and correct inconsistencies in my data sets. I prefer the central semantic storage approach to prevent data inconsistencies. That helps create a central area for the data that can be used as a reference when processing the complete data set. If an inconsistency still occurs, I typically use a primary key to link to a table so I can re-enter the correct data. This approach has worked well for me in my previous positions."