Preview Questions Data Modeling Concepts | Role Specific Skill

Question 1: What strategy would you use to optimize query performance in a dimensional model?

Which action should you take?

Choose only one option

Create indexes on frequently queried columns to speed up data retrieval

Increase the database server's memory capacity

Normalize all dimension tables to reduce redundancy

Limit the number of concurrent users accessing the database

Question 2: You need to manage data lineage in your dimensional model. What do you do?

Which action should you take?

Choose only one option

Implement data lineage tools

Use ETL process documentation

Implement a data catalog

Track data transformations and movements

Question 3: You need to model a relationship where one entity can have multiple types of associations with another entity. How do you handle this?

Which action should you take?

Choose only one option

Use multiple foreign keys

Create associative entities for each relationship type

Use polymorphic relationships

Implement a generic relationship entity

Question 4: You need to improve query performance in your data warehouse. What is your solution?

Which action should you take?

Choose only one option

Implement indexing

Use materialized views

Optimize ETL processes

Partition large tables

Question 5: How do you handle large volumes of data in your database design?

Which action should you take?

Choose only one option

Use partitioning

Implement archiving policies

Use compression techniques

Regularly monitor data growth

Question 6: How do you calculate the year-over-year sales growth for each product?

Which action should you take?

Choose only one option

Use a window function with LAG()

Use a nested query with self-join

Use a CTE with date functions

Use a subquery with date conditions