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Databricks Certified Data Engineer Professional Sample Questions:

1. A data engineer is testing a collection of mathematical functions, one of which calculates the area under a curve as described by another function.
Which kind of the test does the above line exemplify?

A) Integration
B) functional
C) Unit
D) Manual
E) End-to-end

2. A data engineer is configuring a pipeline that will potentially see late-arriving, duplicate records.
In addition to de-duplicating records within the batch, which of the following approaches allows Get Latest & Actual Certified-Data-Engineer-Professional Exam's Question and Answers from the data engineer to deduplicate data against previously processed records as it is inserted into a Delta table?

A) Perform a full outer join on a unique key and overwrite existing data.
B) Perform an insert-only merge with a matching condition on a unique key.
C) Rely on Delta Lake schema enforcement to prevent duplicate records.
D) Set the configuration delta.deduplicate = true.
E) VACUUM the Delta table after each batch completes.

3. Although the Databricks Utilities Secrets module provides tools to store sensitive credentials and avoid accidentally displaying them in plain text users should still be careful with which credentials are stored here and which users have access to using these secrets.
Which statement describes a limitation of Databricks Secrets?

A) Iterating through a stored secret and printing each character will display secret contents in plain text.
B) The Databricks REST API can be used to list secrets in plain text if the personal access token has proper credentials.
C) Because the SHA256 hash is used to obfuscate stored secrets, reversing this hash will display Get Latest & Actual Certified-Data-Engineer-Professional Exam's Question and Answers from the value in plain text.
D) Account administrators can see all secrets in plain text by logging on to the Databricks Accounts console.
E) Secrets are stored in an administrators-only table within the Hive Metastore; database administrators have permission to query this table by default.

4. The data engineering team is migrating an enterprise system with thousands of tables and views into the Lakehouse. They plan to implement the target architecture using a series of bronze, silver, and gold tables. Bronze tables will almost exclusively be used by production data engineering workloads, while silver tables will be used to support both data engineering and machine learning workloads. Gold tables will largely serve business intelligence and reporting purposes. While personal identifying information (PII) exists in all tiers of data, pseudonymization and anonymization rules are in place for all data at the silver and gold levels.
The organization is interested in reducing security concerns while maximizing the ability to collaborate across diverse teams.
Which statement exemplifies best practices for implementing this system?

A) Because databases on Databricks are merely a logical construct, choices around database organization do not impact security or discoverability in the Lakehouse.
B) Storinq all production tables in a single database provides a unified view of all data assets available throughout the Lakehouse, simplifying discoverability by granting all users view privileges on this database.
C) Working in the default Databricks database provides the greatest security when working with managed tables, as these will be created in the DBFS root.
D) Because all tables must live in the same storage containers used for the database they're created in, organizations should be prepared to create between dozens and thousands of databases depending on their data isolation requirements.
E) Isolating tables in separate databases based on data quality tiers allows for easy permissions management through database ACLs and allows physical separation of default storage locations for managed tables.

5. An external object storage container has been mounted to the location /mnt/finance_eda_bucket.
The following logic was executed to create a database for the finance team:

After the database was successfully created and permissions configured, a member of the finance team runs the following code:

If all users on the finance team are members of the finance group, which statement describes how the tx_sales table will be created?

A) A managed table will be created in the DBFS root storage container.
B) An managed table will be created in the storage container mounted to /mnt/finance_eda_bucket.
C) A logical table will persist the query plan to the Hive Metastore in the Databricks control plane.
D) A logical table will persist the physical plan to the Hive Metastore in the Databricks control plane.
E) An external table will be created in the storage container mounted to /mnt/finance eda bucket.

Solutions: