### Q1: What is the primary data structure used in relational databases?  
### Q2: How does a non-relational database handle unstructured data compared to a relational database?  
### Q3: What are the scalability advantages of non-relational databases over relational databases?  
### Q4: In a financial application, why would you choose a relational database for managing customer transactions?  
### Q5: How does a non-relational database support rapid changes in a fintech application's data structure?  
### Q6: In what scenario might a non-relational database be more suitable for a new fintech app experiencing rapid growth?  
### Q7: How can effective communication of database structure differences enhance team collaboration in a fintech project?  
### Q8: What communication strategies can be employed to explain the need for data integrity in database selection to stakeholders?  
### Q9: How can you simplify complex database concepts for clients who may not have a technical background?