Databricks Certified Data Engineer - Associate

Explanation

In Databricks, when you create a database using the CREATE DATABASE command without specifying a location, the database is created in the default Hive warehouse location. The default location for Hive databases in Databricks is:

dbfs:/user/hive/warehouse/

When you create a database without specifying a custom location, Databricks creates a subdirectory for that database within the warehouse directory. For the customer360 database, the actual directory would be:

dbfs:/user/hive/warehouse/customer360.db

Let's analyze why the other options are incorrect:

• Option A (dbfs:/user/hive/database/customer360): This is not the standard Databricks Hive warehouse structure.
• Option C (dbfs:/user/hive/customer360): This path doesn't follow the standard warehouse directory structure.
• Option D (More information is needed): This is incorrect because we have enough information - databases created without a specified location go to the default warehouse.
• Option E (dbfs:/user/hive/database): This is not the standard warehouse location.

Key Points:

1. The default Hive warehouse location in Databricks is dbfs:/user/hive/warehouse
2. Databases are created as subdirectories with .db extension within this location
3. You can specify a custom location using: CREATE DATABASE customer360 LOCATION 'dbfs:/custom/path'
4. Without a custom location, it defaults to the warehouse directory