SCIO Health Analytics Interview Questions and Answers

Running total per month can be obtained by summing the sales data for each month. Three-month moving average can be calculated by averaging the total sales for the current month and the two previous months.

• To obtain a running total per month, sum the sales data for each month.

• To calculate the three-month moving average of total sales, average the total sales for the current month and the two previous months.

• Example: Running total for January = Sales in January, Three-month mo...read more

Relational databases store data in tables with predefined relationships, while non-relational databases store data in flexible, schema-less formats.

• Relational databases use structured query language (SQL) for querying data

• Non-relational databases are more flexible and can store data in various formats like key-value pairs, documents, graphs, etc.

• Examples of relational databases include MySQL, Oracle, and SQL Server

• Examples of non-relational databases include MongoDB, Cassandr...read more

CTEs are generally more efficient than subqueries due to their ability to be reused and optimized by the query planner.

• CTEs can be referenced multiple times within a query, reducing the need to repeat the same subquery logic.

• CTEs can improve query readability and maintainability by breaking down complex logic into smaller, more manageable parts.

• CTEs can be optimized by the query planner, potentially leading to better performance compared to subqueries.

I am currently located in New York City.

• I am based in New York City

• I have been living in New York for the past 5 years

• My current address is in Manhattan, New York

Reverse a stack using recursion

• Use recursion to remove each element from the stack and store it in a temporary variable

• Recursively call the reverse function on the remaining stack

• Push the temporary variable back into the reversed stack