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Exam Certified Data Engineer Professional topic 1 question 4 discussion

Actual exam question from Databricks's Certified Data Engineer Professional
Question #: 4
Topic #: 1
[All Certified Data Engineer Professional Questions]

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:

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?

  • A. The total average temperature across all sensors exceeded 120 on three consecutive executions of the query
  • B. The recent_sensor_recordings table was unresponsive for three consecutive runs of the query
  • C. The source query failed to update properly for three consecutive minutes and then restarted
  • D. The maximum temperature recording for at least one sensor exceeded 120 on three consecutive executions of the query
  • E. The average temperature recordings for at least one sensor exceeded 120 on three consecutive executions of the query
Show Suggested Answer Hide Answer
Suggested Answer: E 🗳️
by saikot at Sept. 30, 2023, 1:43 p.m.

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EelkeV
17 hours, 11 minutes ago
Selected Answer: E
Because the mean is calculated for each sensor, and on that the alert is raised. It happened for three times, unknown for which sensor. Could be any
upvoted 1 times
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AndreFR
5 months, 2 weeks ago
A excluded because there is a group by clause B & C excluded table needs to be updated to mean value to change D excluded, because alert is set on average not max temperature Correct answer is E by elimination
upvoted 1 times
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panya
7 months, 2 weeks ago
Correct
upvoted 1 times
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imatheushenrique
8 months ago
E. The average temperature recordings for at least one sensor exceeded 120 on three consecutive executions of the query
upvoted 1 times
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Jay_98_11
1 year ago
Selected Answer: E
E is correct
upvoted 1 times
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sturcu
1 year, 3 months ago
Selected Answer: E
correct
upvoted 2 times
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saikot
1 year, 4 months ago
The correct answer is E https://www.myexamcollection.com/databricks-certified-professional-data-engineer-databricks-certified-professional-data-engineer-exam-question-answers.htm
upvoted 1 times
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A (35%)
C (25%)
B (20%)
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