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Exam Certified Data Engineer Professional topic 1 question 126 discussion

Actual exam question from Databricks's Certified Data Engineer Professional
Question #: 126
Topic #: 1
[All Certified Data Engineer Professional Questions]

A junior member of the data engineering team is exploring the language interoperability of Databricks notebooks. The intended outcome of the below code is to register a view of all sales that occurred in countries on the continent of Africa that appear in the geo_lookup table.

Before executing the code, running SHOW TABLES on the current database indicates the database contains only two tables: geo_lookup and sales.



What will be the outcome of executing these command cells m order m an interactive notebook?

  • A. Both commands will succeed. Executing SHOW TABLES will show that countries_af and sales_af have been registered as views.
  • B. Cmd 1 will succeed. Cmd 2 will search all accessible databases for a table or view named countries_af: if this entity exists, Cmd 2 will succeed.
  • C. Cmd 1 will succeed and Cmd 2 will fail. countries_af will be a Python variable representing a PySpark DataFrame.
  • D. Cmd 1 will succeed and Cmd 2 will fail. countries_af will be a Python variable containing a list of strings.
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Suggested Answer: D 🗳️
by hpkr at June 12, 2024, 2:06 a.m.

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_lene_
3 months, 2 weeks ago
Selected Answer: D
D is correct
upvoted 1 times
...
nedlo
6 months, 1 week ago
i wonder if not B? I guess name of view can be the same as name of Python variable?
upvoted 1 times
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Hadiler
9 months, 1 week ago
Selected Answer: D
D is correct. It will not be DataFrame since collect() will change it to list of strings
upvoted 4 times
arekm
4 months ago
Still D, but collect() actually returns a DataFrame. It is however used in a comprehension that extracts first column of each row and gets the string.
upvoted 1 times
...
...
vexor3
9 months, 2 weeks ago
Selected Answer: D
D is correct
upvoted 1 times
...
hpkr
10 months, 3 weeks ago
Selected Answer: D
D is correct
upvoted 1 times
...
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