DATABRICKS-CERTIFIED-DATA-ENGINEER-ASSOCIATE Online Practice Questions and Answers

Which of the following commands will return the location of database customer360?

A. DESCRIBE LOCATION customer360;

B. DROP DATABASE customer360;

C. DESCRIBE DATABASE customer360;

D. ALTER DATABASE customer360 SET DBPROPERTIES ('location' = '/user'};

E. USE DATABASE customer360;

Which of the following describes when to use the CREATE STREAMING LIVE TABLE (formerly CREATE INCREMENTAL LIVE TABLE) syntax over the CREATE LIVE TABLE syntax when creating Delta Live Tables (DLT) tables using SQL?

A. CREATE STREAMING LIVE TABLE should be used when the subsequent step in the DLT pipeline is static.

B. CREATE STREAMING LIVE TABLE should be used when data needs to be processed incrementally.

C. CREATE STREAMING LIVE TABLE is redundant for DLT and it does not need to be used.

D. CREATE STREAMING LIVE TABLE should be used when data needs to be processed through complicated aggregations.

E. CREATE STREAMING LIVE TABLE should be used when the previous step in the DLT pipeline is static.

A data engineer is running code in a Databricks Repo that is cloned from a central Git repository. A colleague of the data engineer informs them that changes have been made and synced to the central Git repository. The data engineer now needs to sync their Databricks Repo to get the changes from the central Git repository.

Which of the following Git operations does the data engineer need to run to accomplish this task?

A. Merge

B. Push

C. Pull

D. Commit

E. Clone

A data engineer needs to apply custom logic to identify employees with more than 5 years of experience in array column employees in table stores. The custom logic should create a new column exp_employees that is an array of all of the employees with more than 5 years of experience for each row. In order to apply this custom logic at scale, the data engineer wants to use the FILTER higher-order function.

Which of the following code blocks successfully completes this task?

A. Option A

B. Option B

C. Option C

D. Option D

E. Option E

A data engineer runs a statement every day to copy the previous day's sales into the table transactions. Each day's sales are in their own file in the location "/transactions/raw". Today, the data engineer runs the following command to complete this task:

After running the command today, the data engineer notices that the number of records in table transactions has not changed. Which of the following describes why the statement might not have copied any new records into the table?

A. The format of the files to be copied were not included with the FORMAT_OPTIONS keyword.

B. The names of the files to be copied were not included with the FILES keyword.

C. The previous day's file has already been copied into the table.

D. The PARQUET file format does not support COPY INTO.

E. The COPY INTO statement requires the table to be refreshed to view the copied rows.

Which of the following describes the relationship between Gold tables and Silver tables?

A. Gold tables are more likely to contain aggregations than Silver tables.

B. Gold tables are more likely to contain valuable data than Silver tables.

C. Gold tables are more likely to contain a less refined view of data than Silver tables.

D. Gold tables are more likely to contain more data than Silver tables.

E. Gold tables are more likely to contain truthful data than Silver tables.

A data engineer has been using a Databricks SQL dashboard to monitor the cleanliness of the input data to an ELT job. The ELT job has its Databricks SQL query that returns the number of input records containing unexpected NULL values. The data engineer wants their entire team to be notified via a messaging webhook whenever this value reaches 100.

Which of the following approaches can the data engineer use to notify their entire team via a messaging webhook whenever the number of NULL values reaches 100?

A. They can set up an Alert with a custom template.

B. They can set up an Alert with a new email alert destination.

C. They can set up an Alert with a new webhook alert destination.

D. They can set up an Alert with one-time notifications.

E. They can set up an Alert without notifications.

A data engineer that is new to using Python needs to create a Python function to add two integers together and return the sum? Which of the following code blocks can the data engineer use to complete this task?

A. Option A

B. Option B

C. Option C

D. Option D

E. Option E

In which of the following file formats is data from Delta Lake tables primarily stored?

A. Delta

B. CSV

C. Parquet

D. JSON

E. A proprietary, optimized format specific to Databricks

A data engineer is designing a data pipeline. The source system generates files in a shared directory that is also used by other processes. As a result, the files should be kept as is and will accumulate in the directory. The data engineer needs to identify which files are new since the previous run in the pipeline, and set up the pipeline to only ingest those new files with each run.

Which of the following tools can the data engineer use to solve this problem?

A. Unity Catalog

B. Delta Lake

C. Databricks SQL

D. Data Explorer

E. Auto Loader