Preview Questions Data Modeling Concepts | Role Specific Skill

Question 1: You need to model a situation where a Student can enroll in multiple Courses, and each Course can have multiple Students. How do you represent this?

Which action should you take?

Choose only one option

One-to-One relationship

One-to-Many relationship

Many-to-One relationship

Many-to-Many relationship with an associative entity

Question 2: You need to integrate unstructured data into your data warehouse. What is your strategy?

Which action should you take?

Choose only one option

Use a data lake

Implement a data integration platform

Use ETL processes to transform unstructured data

Implement a schema-on-read approach

Question 3: How do you handle many-to-many relationships in your dimensional model?

Which action should you take?

Choose only one option

Use a bridge table

Use a snowflake schema

Implement a hybrid schema

Use multiple fact tables

Question 4: How do you identify employees who earn above the average salary of their department?

Which action should you take?

Choose only one option

Use a nested query with AVG()

Use a window function with PARTITION BY and AVG()

Use a CTE with AVG()

Use a subquery with GROUP BY

Question 5: You need to ensure referential integrity in your ER model. What is your approach?

Which action should you take?

Choose only one option

Use foreign keys to enforce relationships

Define unique constraints on primary keys

Regularly audit the database

Implement triggers to maintain integrity

Question 6: How do you represent the lifecycle of an object in UML?

Which action should you take?

Choose only one option

Use a state diagram

Use a class diagram

Use a sequence diagram

Use an activity diagram