### Q1: What are the primary differences between SQL and NoSQL databases in terms of data structure and usage?  
### Q2: How does the flexibility of NoSQL databases benefit applications that handle diverse data types?  
### Q3: In what situations might the lack of a predefined schema in NoSQL databases become a challenge for data integrity?  
### Q4: When would you opt for a data lake instead of a data warehouse for your B2C application?  
### Q5: What advantages do data warehouses provide for businesses focused on generating actionable insights from their data?  
### Q6: Can you describe a scenario where using a data lake might hinder effective data analysis?  
### Q7: How does mastering ETL processes contribute to a software developer's effectiveness in managing data pipelines?  
### Q8: What are the key steps involved in the ETL process, and how do they impact data quality?  
### Q9: Why is it important for a software developer to understand data transformation techniques in the context of user experience?