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Desktop-Based Databricks Databricks-Certified-Data-Engineer-Associate Practice Test Software

Desktop-Based Databricks Databricks-Certified-Data-Engineer-Associate Practice Test Software

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Databricks Certified Data Engineer Associate Exam Sample Questions (Q28-Q33):

NEW QUESTION # 28
A data engineer needs to create a table in Databricks using data from their organization's existing SQLite database.
They run the following command:

Which of the following lines of code fills in the above blank to successfully complete the task?

  • A. autoloader
  • B. DELTA
  • C. org.apache.spark.sql.jdbc
  • D. org.apache.spark.sql.sqlite
  • E. sqlite

Answer: C

Explanation:
CREATE TABLE new_employees_table
USING JDBC
OPTIONS (
url "<jdbc_url>",
dbtable "<table_name>",
user '<username>',
password '<password>'
) AS
SELECT * FROM employees_table_vw
https://docs.databricks.com/external-data/jdbc.html#language-sql


NEW QUESTION # 29
Which of the following commands can be used to write data into a Delta table while avoiding the writing of duplicate records?

  • A. MERGE
  • B. DROP
  • C. INSERT
  • D. IGNORE
  • E. APPEND

Answer: A


NEW QUESTION # 30
An engineering manager wants to monitor the performance of a recent project using a Databricks SQL query.
For the first week following the project's release, the manager wants the query results to be updated every minute. However, the manager is concerned that the compute resources used for the query will be left running and cost the organization a lot of money beyond the first week of the project's release.
Which of the following approaches can the engineering team use to ensure the query does not cost the organization any money beyond the first week of the project's release?

  • A. They can set the query's refresh schedule to end on a certain date in the query scheduler.
  • B. They can set a limit to the number of DBUs that are consumed by the SQL Endpoint.
  • C. They can set the query's refresh schedule to end after a certain number of refreshes.
  • D. They can set a limit to the number of individuals that are able to manage the query's refresh schedule.
  • E. They cannot ensure the query does not cost the organization money beyond the first week of the project's release.

Answer: A

Explanation:
Explanation
If a dashboard is configured for automatic updates, it has a Scheduled button at the top, rather than a Schedule button. To stop automatically updating the dashboard and remove its subscriptions:
Click Scheduled.
In the Refresh every drop-down, select Never.
Click Save. The Scheduled button label changes to Schedule.
Source:https://learn.microsoft.com/en-us/azure/databricks/sql/user/dashboards/


NEW QUESTION # 31
A data engineer wants to schedule their Databricks SQL dashboard to refresh every hour, but they only want the associated SQL endpoint to be running when it is necessary. The dashboard has multiple queries on multiple datasets associated with it. The data that feeds the dashboard is automatically processed using a Databricks Job.
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 reduce the cluster size of the SQL endpoint.
  • B. They can ensure the dashboard's SQL endpoint matches each of the queries' SQL endpoints.
  • C. They can ensure the dashboard's SQL endpoint is not one of the included query's SQL endpoint.
  • D. They can set up the dashboard's SQL endpoint to be serverless.
  • E. They can turn on the Auto Stop feature for the SQL endpoint.

Answer: E

Explanation:
The Auto Stop feature allows the SQL endpoint to automatically stop after a specified period of inactivity. This can help reduce the cost and resource consumption of the SQL endpoint, as it will only run when it is needed to refresh the dashboard or execute queries. The data engineer can configure the Auto Stop setting for the SQL endpoint from the SQL Endpoints UI, by selecting the desired idle time from the Auto Stop dropdown menu. The default idle time is 120 minutes, but it can be set to as low as 15 minutes or as high as 240 minutes. Alternatively, the data engineer can also use the SQL Endpoints REST API to set the Auto Stop setting programmatically. Reference: SQL Endpoints UI, SQL Endpoints REST API, Refreshing SQL Dashboard


NEW QUESTION # 32
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 wrap the queries using PySpark and use Python's control flow system to determine when to run the final query.
  • B. They could automatically restrict access to the source table in the final query so that it is only accessible on Sundays.
  • C. They could only run the entire program on Sundays.
  • D. They could submit a feature request with Databricks to add this functionality.
  • E. They could redesign the data model to separate the data used in the final query into a new table.

Answer: A


NEW QUESTION # 33
......

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