Preview Questions Data Modeling Concepts | Role Specific Skill

Question 1: How do you decide between using a star schema or snowflake schema for a new dimensional model?

Which action should you take?

Choose only one option

Analyze the complexity of data relationships and choose the schema that best fits the requirements

Always opt for a snowflake schema to maintain data integrity

Choose a star schema for flexibility in reporting

Design a schema based on personal preference rather than data requirements

Question 2: Your database schema includes several repeated groups of attributes. How do you address this?

Which action should you take?

Choose only one option

Apply First Normal Form (1NF)

Apply Second Normal Form (2NF)

Apply Third Normal Form (3NF)

Apply Fourth Normal Form (4NF)

Question 3: Your data warehouse needs to support real-time data updates. What do you implement?

Which action should you take?

Choose only one option

Use real-time ETL processes

Create a separate real-time data store

Implement change data capture (CDC)

Use a data streaming platform

Question 4: Your dimensional model needs to support real-time data updates. What do you implement?

Which action should you take?

Choose only one option

Use real-time ETL processes

Create a separate real-time data store

Implement change data capture (CDC)

Use a data streaming platform

Question 5: How do you model the interaction between objects in a use case?

Which action should you take?

Choose only one option

Use a sequence diagram

Use a class diagram

Use a state diagram

Use a component diagram

Question 6: How do you handle an entity with a complex attribute, such as an address?

Which action should you take?

Choose only one option

Use a composite attribute.

Use a multivalued attribute.

Create a separate entity for the complex attribute.

Include the complex attribute as a single field.