Online Access Free Databricks.Databricks-Certified-Professional-Data-Engineer.v2023-02-09.q22 Practice Test (Page 4)

Databricks-Certified-Professional-Data-Engineer Exam Question 11

A data engineer wants to horizontally combine two tables as a part of a query. They want to use a shared
column as a key column, and they only want the query result to contain rows whose value in the key column is
present in both tables.
Which of the following SQL commands can they use to accomplish this task?

A.LEFT JOIN

B.OUTER JOIN

C.MERGE

D.UNION

E.INNER JOIN

Databricks-Certified-Professional-Data-Engineer Exam Question 12

Which of the following data workloads will utilize a Bronze table as its source?

A.A job that aggregates cleaned data to create standard summary statistics

B.A job that develops a feature set for a machine learning application

C.A job that enriches data by parsing its timestamps into a human-readable format

D.A job that queries aggregated data to publish key insights into a dashboard

E.A job that ingests raw data from a streaming source into the Lakehouse

Databricks-Certified-Professional-Data-Engineer Exam Question 13

Which of the following commands will return records from an existing Delta table my_table where duplicates
have been removed?

A.1. MERGE INTO my_table a
2. USING new_records b ON a.id = b.id
3. WHEN NOT MATCHED
4. THEN INSERT *;

B.1. SELECT DISTINCT *
2. FROM my_table;

C.1. DROP DUPLICATES
2. FROM my_table;

D.1. MERGE INTO my_table a
2. USING new_records b;

E.1. SELECT *
2. FROM my_table
3. WHERE duplicate = False;

Databricks-Certified-Professional-Data-Engineer Exam Question 14

Two junior data engineers are authoring separate parts of a single data pipeline notebook. They are working on
separate Git branches so they can pair program on the same notebook simultaneously. A senior data engineer
experienced in Databricks suggests there is a better alternative for this type of collaboration.
Which of the following supports the senior data engineer's claim?

A.Databricks Notebooks support the use of multiple languages in the same notebook

B.Databricks Notebooks support real-time co-authoring on a single notebook

C.Databricks Notebooks support the creation of interactive data visualizations

D.Databricks Notebooks support automatic change-tracking and versioning

E.Databricks Notebooks support commenting and notification comments

Databricks-Certified-Professional-Data-Engineer Exam Question 15

Projecting a multi-dimensional dataset onto which vector has the greatest variance?

A.first principal component

B.first eigenvector

C.not enough information given to answer

D.second eigenvector

E.second principal component

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Databricks-Certified-Professional-Data-Engineer Exam Question 11

Databricks-Certified-Professional-Data-Engineer Exam Question 12

Databricks-Certified-Professional-Data-Engineer Exam Question 13

Databricks-Certified-Professional-Data-Engineer Exam Question 14

Databricks-Certified-Professional-Data-Engineer Exam Question 15

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