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Databricks Certified Data Engineer Professional

Verified practice questions with detailed answers, clear explanations, and community discussion.

  • 339

    questions

  • 6 days ago

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Question 1 of 339

An upstream system has been configured to pass the date for a given batch of data to the Databricks Jobs API as a parameter. The notebook to be scheduled will use this parameter to load data with the following code: df = spark.read.format("parquet").load(f"/mnt/source/(date)")
Which code block should be used to create the date Python variable used in the above code block?
Answer choices
Show answer

Correct answer: E

Parameters passed to a notebook task through the Jobs API arrive as notebook widgets, so the notebook reads them with dbutils.widgets.get. Declaring the widget first with dbutils.widgets.text("date", "null") gives it a default for interactive runs, and the job's parameter value overrides that default when the task executes. spark.conf.get reads Spark configuration rather than task parameters, input() waits for keyboard input that a scheduled job can never supply, sys.argv only applies to Python scripts run from a shell, and dbutils.notebooks.getParam is not a Databricks utility at all.

Community votes

25 votes

ESuggested

92%

D

8%

Question 2 of 339

The Databricks workspace administrator has configured interactive clusters for each of the data engineering groups. To control costs, clusters are set to terminate after 30 minutes of inactivity. Each user should be able to execute workloads against their assigned clusters at any time of the day.

Assuming users have been added to a workspace but not granted any permissions, which of the following describes the minimal permissions a user would need to start and attach to an already configured cluster.

Answer choices
Show answer

Correct answer: D

The minimal permissions a user needs to start and attach to an already configured cluster in Databricks are 'Can Restart' privileges on the required cluster. 'Can Restart' allows users to start a terminated cluster without unnecessary additional permissions.

Community votes

54 votes

DSuggested

80%

C

17%

A

4%

Question 3 of 339

When scheduling Structured Streaming jobs for production, which configuration automatically recovers from query failures and keeps costs low?

Answer choices
Show answer

Correct answer: D

To schedule Structured Streaming jobs for production with an automatic recovery from query failures while keeping costs low, you should use a new job cluster to ensure an isolated and streamlined environment, set retries to unlimited to handle and recover from any failures automatically, and limit maximum concurrent runs to 1 to avoid resource contention and ensure only one instance of the query runs at a time. This configuration efficiently manages resources and ensures the job's reliability and cost-effectiveness.

Community votes

16 votes

DSuggested

100%

Question 4 of 339

The data engineering team has configured a Databricks SQL query and alert to monitor the values in a Delta Lake table. The recent_sensor_recordings table contains an identifying sensor_id alongside the timestamp and temperature for the most recent 5 minutes of recordings.

The below query is used to create the alert:

Exam Certified Data Engineer Professional: Question 4 - Image 1

The query is set to refresh each minute and always completes in less than 10 seconds. The alert is set to trigger when mean (temperature) > 120. Notifications are triggered to be sent at most every 1 minute.If this alert raises notifications for 3 consecutive minutes and then stops, which statement must be true?

Answer choices
Show answer

Correct answer: E

The alert is set to trigger when the mean temperature exceeds 120. Given that notifications were raised for three consecutive minutes and then stopped, it must be true that the average temperature recordings for at least one sensor exceeded 120 on three consecutive executions of the query.

Community votes

12 votes

ESuggested

75%

D

25%

Question 5 of 339

A junior developer complains that the code in their notebook isn't producing the correct results in the development environment. A shared screenshot reveals that while they're using a notebook versioned with Databricks Repos, they're using a personal branch that contains old logic. The desired branch named dev-2.3.9 is not available from the branch selection dropdown.

Which approach will allow this developer to review the current logic for this notebook?

Answer choices
Show answer

Correct answer: B

The correct approach is to use Repos to pull changes from the remote Git repository and select the dev-2.3.9 branch. This will allow the developer to access the most recent and desired logic for the notebook. Pulling changes from the remote repository ensures that the latest updates are incorporated and selecting the specific branch will provide the correct version of the code.

Community votes

11 votes

BSuggested

100%

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Charles Sirois
Canada
As this was my first certification exam, I was understandably nervous about what to expect. These study materials made the preparation process much easier, and many of the questions closely reflected those on the actual exam.
Lance Chambers
United States
Wasted about a month going through the free dump sites scattered all over reddit, half the answers were wrong and the other half were for a version of the exam that doesn't even exist anymore. Eventually gave in and paid the small fee here, and the difference was night and day.
Alisha Kelly
Italy
Honestly, I had already gone through the official documentation quite thoroughly, but still didn't feel fully confident going in. This helped things finally click for me. I realized I knew the material, but just hadn't connected all the pieces yet.
Casper Claassen
Netherlands
Used this along with Microsoft Learn and the combo worked really well. The practice questions made the stuff I'd read actually stick. Passed first attempt, no complaints from me.
Gabriele Ghesla
Italy
The content is accurate and clearly presented, and it's more affordable than competitors. The team has been incredibly responsive whenever I've had an issue, and they've been open to small changes that improve the platform.
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I don't usually leave reviews, but this one felt worth sharing. The questions were quite close to what actually appeared on the exam, more than I expected. I spent about a week going through the material before my test, and it helped me feel more prepared.
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Neil Savage
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A very quick response was received via email when a link issue occurred. The study materials provided were high quality and extremely helpful. I was able to complete the test successfully. Many thanks for the excellent support.
Morgan Farmer
United Kingdom
I don't usually leave reviews, but this one felt worth sharing. The questions were quite close to what actually appeared on the exam, more than I expected. I spent about a week going through the material before my test, and it helped me feel more prepared.
Remi Nuyts
United States
Passed ITIL 4 Foundation with 87%. Material was enough by itself.
Archie Hopkins
United States
I had a smooth experience from start to finish. Access was available right away, no technical issues, which made it easy to get started. The content felt relevant and aligned well with what I was looking for.
Nancy Mcbride
United States
Does what it says it does. Content felt solid, nothing confusing to navigate and I didn't run into any weird issues. I been putting off scheduling the exam for a while and going through this gave me enough confidence to finally book it and pass.
Neil Savage
United States
A very quick response was received via email when a link issue occurred. The study materials provided were high quality and extremely helpful. I was able to complete the test successfully. Many thanks for the excellent support.

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