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 approaches should be used to send the Databricks Job owner an email in the case that the Job fails?

A. Manually programming in an alert system in each cell of the Notebook

B. Setting up an Alert in the Job page

C. Setting up an Alert in the Notebook

D. There is no way to notify the Job owner in the case of Job failure

E. MLflow Model Registry Webhooks

Which of the following must be specified when creating a new Delta Live Tables pipeline?

A. A key-value pair configuration

B. The preferred DBU/hour cost

C. A path to cloud storage location for the written data

D. A location of a target database for the written data

E. At least one notebook library to be executed

Which of the following benefits is provided by the array functions from Spark SQL?

A. An ability to work with data in a variety of types at once

B. An ability to work with data within certain partitions and windows

C. An ability to work with time-related data in specified intervals

D. An ability to work with complex, nested data ingested from JSON files

E. An ability to work with an array of tables for procedural automation

A data analyst has created a Delta table sales that is used by the entire data analysis team. They want help from the data engineering team to implement a series of tests to ensure the data is clean. However, the data engineering team uses Python for its tests rather than SQL.

Which of the following commands could the data engineering team use to access sales in PySpark?

A. SELECT * FROM sales

B. There is no way to share data between PySpark and SQL.

C. spark.sql("sales")

D. spark.delta.table("sales")

E. spark.table("sales")

A new data engineering team team has been assigned to an ELT project. The new data engineering team will need full privileges on the table sales to fully manage the project.

Which of the following commands can be used to grant full permissions on the database to the new data engineering team?

A. GRANT ALL PRIVILEGES ON TABLE sales TO team;

B. GRANT SELECT CREATE MODIFY ON TABLE sales TO team;

C. GRANT SELECT ON TABLE sales TO team;

D. GRANT USAGE ON TABLE sales TO team;

E. GRANT ALL PRIVILEGES ON TABLE team TO sales;

A data engineer needs to use a Delta table as part of a data pipeline, but they do not know if they have the appropriate permissions. In which of the following locations can the data engineer review their permissions on the table?

A. Databricks Filesystem

B. Jobs

C. Dashboards

D. Repos

E. Data Explorer

A data analyst has a series of queries in a SQL program. The data analyst wants this program to run every day. They only want the final query in the program to run on Sundays. They ask for help from the data engineering team to complete this task.

Which of the following approaches could be used by the data engineering team to complete this task?

A. They could submit a feature request with Databricks to add this functionality.

B. They could wrap the queries using PySpark and use Python's control flow system to determine when to run the final query.

C. They could only run the entire program on Sundays.

D. They could automatically restrict access to the source table in the final query so that it is only accessible on Sundays.

E. They could redesign the data model to separate the data used in the final query into a new table.

Which of the following benefits of using the Databricks Lakehouse Platform is provided by Delta Lake?

A. The ability to manipulate the same data using a variety of languages

B. The ability to collaborate in real time on a single notebook

C. The ability to set up alerts for query failures

D. The ability to support batch and streaming workloads

E. The ability to distribute complex data operations

A data engineer wants to schedule their Databricks SQL dashboard to refresh once per day, but they only want the associated SQL endpoint to be running when it is necessary.

Which of the following approaches can the data engineer use to minimize the total running time of the SQL endpoint used in the refresh schedule of their dashboard?

A. They can ensure the dashboard's SQL endpoint matches each of the queries' SQL endpoints.

B. They can set up the dashboard's SQL endpoint to be serverless.

C. They can turn on the Auto Stop feature for the SQL endpoint.

D. They can reduce the cluster size of the SQL endpoint.

E. They can ensure the dashboard's SQL endpoint is not one of the included query's SQL endpoint.

A data engineer has realized that they made a mistake when making a daily update to a table. They need to use Delta time travel to restore the table to a version that is 3 days old. However, when the data engineer attempts to time travel to the older version, they are unable to restore the data because the data files have been deleted.

Which of the following explains why the data files are no longer present?

A. The VACUUM command was run on the table

B. The TIME TRAVEL command was run on the table

C. The DELETE HISTORY command was run on the table

D. The OPTIMIZE command was nun on the table

E. The HISTORY command was run on the table

Which of the following describes a scenario in which a data team will want to utilize cluster pools?

A. An automated report needs to be refreshed as quickly as possible.

B. An automated report needs to be made reproducible.

C. An automated report needs to be tested to identify errors.

D. An automated report needs to be version-controlled across multiple collaborators.

E. An automated report needs to be runnable by all stakeholders.

A single Job runs two notebooks as two separate tasks. A data engineer has noticed that one of the notebooks is running slowly in the Job's current run. The data engineer asks a tech lead for help in identifying why this might be the case. Which of the following approaches can the tech lead use to identify why the notebook is running slowly as part of the Job?

A. They can navigate to the Runs tab in the Jobs UI to immediately review the processing notebook.

B. They can navigate to the Tasks tab in the Jobs UI and click on the active run to review the processing notebook.

C. They can navigate to the Runs tab in the Jobs UI and click on the active run to review the processing notebook.

D. There is no way to determine why a Job task is running slowly.

E. They can navigate to the Tasks tab in the Jobs UI to immediately review the processing notebook.

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

A data engineer is maintaining a data pipeline. Upon data ingestion, the data engineer notices that the source data is starting to have a lower level of quality. The data engineer would like to automate the process of monitoring the quality level.

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

A. Unity Catalog

B. Data Explorer

C. Delta Lake

D. Delta Live Tables

E. Auto Loader