Free DMC Practical Applications Questions and Answers

Question 1

When designing a database for an e-commerce application, which entities are most likely required?

Accepted Answer

Products

Answer

Operating System Logs

Question 2

What type of database schema is typically used for reporting and business intelligence systems?

Accepted Answer

Star or snowflake schema

Answer

Normalized schema with multiple joins

Answer

Flat file structure

Answer

Key-value storage

Question 3

Which of the following is a real-world use case for data modeling?

Accepted Answer

Designing a database for a hospital to manage patient records

Answer

Creating a machine learning pipeline to clean and preprocess data

Answer

Developing a backup and disaster recovery system

Question 4

How does data modeling improve machine learning workflows?

Accepted Answer

By structuring data for efficient feature extraction

Answer

By optimizing machine learning algorithms

Answer

By training models directly on ERD diagrams

Answer

By enhancing models deployment pipelines

Question 5

Which of the following tools are commonly used to integrate data modeling into data pipelines?

Accepted Answer

Apache NiFi

Answer

ER/Studio