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Download Databricks Certified Professional Data Engineer Exam Exam Dumps

NEW QUESTION 43
A data engineer has a Job with multiple tasks that runs nightly. One of the tasks unexpectedly fails during 10
percent of the runs.
Which of the following actions can the data engineer perform to ensure the Job completes each night while
minimizing compute costs?

A. They can utilize a Jobs cluster for each of the tasks in the JobB. They can institute a retry policy for the entire JobC. They can set up the Job to run multiple times ensuring that at least one will completeD. They can institute a retry policy for the task that periodically failsE. They can observe the task as it runs to try and determine why it is failing

Answer: D

 

NEW QUESTION 44
A data engineering team needs to query a Delta table to extract rows that all meet the same condi-tion.
However, the team has noticed that the query is running slowly. The team has already tuned the size of the
data files. Upon investigating, the team has concluded that the rows meeting the condition are sparsely located
throughout each of the data files.
Based on the scenario, which of the following optimization techniques could speed up the query?

A. Tuning the file sizeB. Bin-packingC. Write as a Parquet fileD. Z-OrderingE. Data skipping

Answer: D

 

NEW QUESTION 45
A data engineering team is in the process of converting their existing data pipeline to utilize Auto Loader for
incremental processing in the ingestion of JSON files. One data engineer comes across the following code
block in the Auto Loader documentation:
1. (streaming_df = spark.readStream.format("cloudFiles")
2. .option("cloudFiles.format", "json")
3. .option("cloudFiles.schemaLocation", schemaLocation)
4. .load(sourcePath))
Assuming that schemaLocation and sourcePath have been set correctly, which of the following changes does
the data engineer need to make to convert this code block to use Auto Loader to ingest the data?

A. The data engineer needs to change the format("cloudFiles") line to format("autoLoader")B. There is no change required. The inclusion of format("cloudFiles") enables the use of Auto LoaderC. There is no change required. Databricks automatically uses Auto Loader for streaming readsD. There is no change required. The data engineer needs to ask their administrator to turn on Auto LoaderE. The data engineer needs to add the .autoLoader line before the .load(sourcePath) line

Answer: B

 

NEW QUESTION 46
A data engineering manager has noticed that each of the queries in a Databricks SQL dashboard takes a few
minutes to update when they manually click the "Refresh" button. They are curious why this might be
occurring, so a team member provides a variety of reasons on why the delay might be occurring.
Which of the following reasons fails to explain why the dashboard might be taking a few minutes to update?

A. The SQL endpoint being used by each of the queries might need a few minutes to start upB. The queries attached to the dashboard might all be connected to their own, unstarted Databricks clustersC. The Job associated with updating the dashboard might be using a non-pooled endpointD. The queries attached to the dashboard might take a few minutes to run under normal circumstancesE. The queries attached to the dashboard might first be checking to determine if new data is available

Answer: C

 

NEW QUESTION 47
A data engineering team has created a series of tables using Parquet data stored in an external sys-tem. The
team is noticing that after appending new rows to the data in the external system, their queries within
Databricks are not returning the new rows. They identify the caching of the previous data as the cause of this
issue.
Which of the following approaches will ensure that the data returned by queries is always up-to-date?

A. The tables should be converted to the Delta formatB. The tables should be refreshed in the writing cluster before the next query is runC. The tables should be updated before the next query is runD. The tables should be altered to include metadata to not cacheE. The tables should be stored in a cloud-based external system

Answer: A

 

NEW QUESTION 48
......

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