Data Analyst Mock Interview
Practice 40 Data Analyst interview questions covering SQL, statistics, and business insights.
Question 2 of 40
Can you describe to me the largest data set you have had to work with from a past project? Tell me how many rows/entries and columns/variables the data set included and details on what kind of data was included—financial, marketing, operational, etc.?
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Helen Lee is a freelance data analyst and writer. She has over 15 years of marketing experience working for companies and clients in financial services, quick-service restaurants (QSR), consumer packaged goods (CPG), and education technology.
Many hiring managers look for data analysts who have the capability to deal with massive data sets with a considerable number of variables and rows. This requires skills such as organization and the ability to see both the big picture and the details of a project. Being able to do both of these is a key qualification hiring managers look for in data analysts.
Helen Lee is a freelance data analyst and writer. She has over 15 years of marketing experience working for companies and clients in financial services, quick-service restaurants (QSR), consumer packaged goods (CPG), and education technology.
"The largest data set I have worked with was built for a corporate strategy project that required the combined efforts of various departments. This data set had over a million records and 500-600 variables. Included in this data set were marketing and operational data that was eventually loaded into an analytical tool for exploratory analysis."
William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.
This question is relatively straightforward, and you should not feel compelled to review details about the background of the project and any processes you might have gone through. The interviewer is interested in the size and type of data when asking questions like this. This gives them an idea of the scope of projects you have experience with and are comfortable working on.
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