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Exam Certified Data Engineer Professional topic 1 question 193 discussion

Actual exam question from Databricks's Certified Data Engineer Professional
Question #: 193
Topic #: 1
[All Certified Data Engineer Professional Questions]

A view is registered with the following code:



Both users and orders are Delta Lake tables.

Which statement describes the results of querying recent_orders?

  • A. The versions of each source table will be stored in the table transaction log; query results will be saved to DBFS with each query.
  • B. All logic will execute when the table is defined and store the result of joining tables to the DBFS; this stored data will be returned when the table is queried.
  • C. All logic will execute at query time and return the result of joining the valid versions of the source tables at the time the query finishes.
  • D. All logic will execute at query time and return the result of joining the valid versions of the source tables at the time the query began.
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Suggested Answer: D 🗳️

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arekm
1 month ago
Selected Answer: D
D - with the view it is always at query time. Once it is run, the engine reads the data - meaning the data state is from when the query was run.
upvoted 1 times
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benni_ale
1 month, 4 weeks ago
Selected Answer: D
View does not write to disk
upvoted 1 times
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divyapsingh
2 months ago
Selected Answer: D
Here the view is getting created not the table. view is only saver select query which will get data from the valid version of the underlying table at the begining of the select statement made on view.
upvoted 2 times
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temple1305
2 months ago
Selected Answer: B
B is correct, view is just query without materialization and return result for moment of execution
upvoted 1 times
carlosmps
1 month, 4 weeks ago
but the option B is materialized stored the data on dbfs....
upvoted 1 times
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B (20%)
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