Preview Questions Data Modeling Concepts | Role Specific Skill

Question 1: How do you find departments where the total salary expense is above the company average?

Which action should you take?

Choose only one option

Use a nested query with SUM() and AVG()

Use a window function with PARTITION BY and SUM()

Use a CTE with aggregate functions

Use a subquery with SUM() and AVG()

Question 2: Your dimensional model must accommodate large volumes of data. What is your approach?

Which action should you take?

Choose only one option

Implement partitioning

Use compression techniques

Implement archiving policies

Use a columnar storage format

Question 3: How do you ensure data consistency in your database design?

Which action should you take?

Choose only one option

Use ACID transactions

Implement validation rules

Regularly audit data

Use data synchronization processes

Question 4: How do you retrieve the highest and lowest salaries for each job title?

Which action should you take?

Choose only one option

Use a window function with RANK()

Use a nested query with GROUP BY

Use a CTE with aggregate functions

Use a subquery with MIN() and MAX()

Question 5: Your dimensional model needs to support complex analytical queries. What is your approach?

Which action should you take?

Choose only one option

Implement OLAP cubes

Use advanced indexing techniques

Optimize the schema design

Use in-memory processing

Question 6: 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