Databricks Certified Data Engineer Professional Exam - Topic 1 Question 16 Discussion

Actual exam question for Databricks's Databricks Certified Data Engineer Professional exam

Question #: 16
Topic #: 1

[All Databricks 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.

Which statement correctly describes the outcome of executing these command cells in order in an interactive notebook?

ABoth commands will succeed. Executing show tables will show that countries at and sales at have been registered as views.

BCmd 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.

CCmd 1 will succeed and Cmd 2 will fail, countries at will be a Python variable representing a PySpark DataFrame.

DBoth commands will fail. No new variables, tables, or views will be created.

ECmd 1 will succeed and Cmd 2 will fail, countries at will be a Python variable containing a list of strings.

Show Suggested Answer

Suggested Answer: B

When viewing a Databricks Python notebook in a text editor, the first line indicates the format and source type of the notebook. The correct option is % Databricks notebook source, which is a magic command that specifies the start of a Databricks notebook source file.

by Gilma at Jul 13, 2024, 06:05 PM

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Carmen

6 months ago

I’m leaning towards option C, seems logical to me.

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Jean

6 months ago

Cmd 2 is going to fail for sure, no table named countries af exists.

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Katie

6 months ago

Wait, countries at is just a Python variable? That’s surprising!

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Joseph

7 months ago

I disagree, I believe both commands will fail.

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Crissy

7 months ago

I think Cmd 1 will definitely succeed.

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Nenita

7 months ago

I’m leaning towards option D because if neither command creates a view or variable, it makes sense that both would fail. But I’m not completely confident about it.

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Nobuko

7 months ago

I vaguely recall that if a variable is created in Python, it won't be recognized as a view. So, maybe Cmd 1 succeeds, but Cmd 2 fails because of that?

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Marva

7 months ago

I think I practiced a similar question where one command succeeded and the other failed. I feel like Cmd 1 should work, but I'm unsure about what happens with Cmd 2.

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Rebecka

8 months ago

I remember that in Databricks, when you register a view, it should be accessible in the current database. But I'm not sure if the second command will work as expected.

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Esteban

8 months ago

I'm a little unsure about the interoperability between PySpark and SQL in Databricks. I'll need to review some examples to make sure I understand how the two languages work together in this type of scenario.

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Wilda

8 months ago

I feel pretty confident about this one. The key is understanding the difference between the two commands. The first one creates a PySpark DataFrame, while the second one tries to register that as a SQL view. I think I know which option is the correct outcome.

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Romana

8 months ago

Okay, let me think this through step-by-step. First, the code is trying to create a view of all sales in African countries. So I'll need to check if the geo_lookup table has the necessary information to filter the sales data correctly. Then I'll focus on how the PySpark and SQL commands interact in this case.

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Margurite

8 months ago

Hmm, I'm a bit confused about the difference between creating a view and a Python variable. I'll need to review the Databricks documentation on that to make sure I don't get tripped up.

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Allene

8 months ago

I think I've got a good handle on this. The key is understanding the interoperability between PySpark and SQL in Databricks notebooks. I'll start by carefully reading through the code and the question to make sure I understand the intended outcome.

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Marica

8 months ago

The image shows the app status, so I'm guessing the answer has to do with the current state of the app in the Google Play store. I'll carefully read through the options.

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Linwood

1 year ago

This question is like a choose-your-own-adventure book, but the only adventure is a coding nightmare. I'm going to play it safe and go with D. After all, better to be a boring winner than a flashy loser, right?

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Rosina

11 months ago

User1: Absolutely, let's stick with option D.

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Rolland

11 months ago

User3: Agreed, better to be a boring winner than a flashy loser.

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Margo

11 months ago

User2: Yeah, playing it safe is the way to go in this situation.

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Valentine

12 months ago

User1: I think I'll go with option D too.

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Phuong

1 year ago

Ha! This question is like a game of 'Where's Waldo' but with SQL commands instead of a tiny dude in a striped shirt. I'm feeling lucky, so I'll go with E and hope the exam graders have a sense of humor.

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Loise

11 months ago

User3: I'm not sure, but let's go with E and see what happens.

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Altha

11 months ago

User2: Yeah, I agree. Let's go with E and hope for the best.

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Francoise

11 months ago

User1: I think E is the correct answer.

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Hoa

1 year ago

Alright, let's think this through logically. If the database only has two tables, then the first command should definitely work. But that second one... it's like a riddle wrapped in a mystery inside an enigma. I'll go with B and hope for the best.

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Kayleigh

11 months ago

User3: Let's go with option B and see what happens.

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Roxane

11 months ago

User2: Yeah, but Cmd 2 is a bit tricky. It might search all accessible databases.

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Isabelle

12 months ago

User1: I think Cmd 1 will work for sure.

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Jesusita

1 year ago

Hmm, this seems like a tricky one. I'm not sure if I should go with the safe bet of D or try to get fancy with C. Maybe I'll just put a coin in the air and see where it lands.

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