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888 analytics senior interview questions shared by candidates

One of the key questions involved data modeling. I was given a set of database tables and asked to design a data model that would enable the business to answer specific analytical and reporting questions. The task required identifying relationships between the tables, defining appropriate entities and dimensions, and structuring the data in a way that supported efficient querying and business insights.
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Senior Analytics Engineer

Interviewed at Treatwell

4.1★
Jun 9, 2026

One of the key questions involved data modeling. I was given a set of database tables and asked to design a data model that would enable the business to answer specific analytical and reporting questions. The task required identifying relationships between the tables, defining appropriate entities and dimensions, and structuring the data in a way that supported efficient querying and business insights.

At 2nd stage: 1. Difference between left and full join - example to explain 2. Window functions 3. Sum over vs sum - example to explain why and what we would get from given query 4.Rate your SQL skills -0-10 Complete 0 questions about BI skills or knowledge, so basically SQL more important than BI. As long as SQL is right you do not need any BI skills :)
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Senior Analytics Engineer

Interviewed at Monzo Bank

3.9★
Nov 9, 2022

At 2nd stage: 1. Difference between left and full join - example to explain 2. Window functions 3. Sum over vs sum - example to explain why and what we would get from given query 4.Rate your SQL skills -0-10 Complete 0 questions about BI skills or knowledge, so basically SQL more important than BI. As long as SQL is right you do not need any BI skills :)

Generally the take home assignment was about data modelling and dbt. They asked to create a data model based on entities important to the company, but the problem is that the process was only fictional without any real dataset given to me.
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Senior Analytics Engineer

Interviewed at DocPlanner

4.2★
Mar 26, 2025

Generally the take home assignment was about data modelling and dbt. They asked to create a data model based on entities important to the company, but the problem is that the process was only fictional without any real dataset given to me.

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