Half the Sky- Chapters 3 and 4

100% Pass 2022 Trustable Databricks Databricks-Certified-Professional-Data-Engineer: Databricks Certified Professional Data Engineer Exam Exam Fee

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NEW QUESTION 46
A data engineer wants to create a relational object by pulling data from two tables. The relational object must
be used by other data engineers in other sessions. In order to save on storage costs, the data engineer wants to
avoid copying and storing physical data.
Which of the following relational objects should the data engineer create?

  • A. Delta Table
  • B. View
  • C. Temporary view
  • D. Database
  • E. Spark SQL Table

Answer: B

 

NEW QUESTION 47
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 automatic change-tracking and versioning
  • B. Databricks Notebooks support the use of multiple languages in the same notebook
  • C. Databricks Notebooks support the creation of interactive data visualizations
  • D. Databricks Notebooks support real-time co-authoring on a single notebook
  • E. Databricks Notebooks support commenting and notification comments

Answer: D

 

NEW QUESTION 48
A data engineer has created a Delta table as part of a data pipeline. Downstream data analysts now need
SELECT permission on the Delta table.
Assuming the data engineer is the Delta table owner, which part of the Databricks Lakehouse Plat-form can
the data engineer use to grant the data analysts the appropriate access?

  • A. Databricks Filesystem
  • B. Repos
  • C. Jobs
    B Dashboards
  • D. Data Explorer

Answer: B

 

NEW QUESTION 49
A data engineer needs to dynamically create a table name string using three Python varia-bles: region, store,
and year. An example of a table name is below when region = "nyc", store = "100", and year = "2021":
nyc100_sales_2021
Which of the following commands should the data engineer use to construct the table name in Py-thon?

  • A. "{region}{store}_sales_{year}"
  • B. f"{region}{store}_sales_{year}"
  • C. "{region}+{store}+_sales_+{year}"
  • D. f"{region}+{store}+_sales_+{year}"
  • E. "{region}+{store}+"_sales_"+{year}"

Answer: B

 

NEW QUESTION 50
Suppose there are three events then which formula must always be equal to P(E1|E2,E3)?

  • A. P(E1,E2|E3)P(E2|E3)P(E3)
  • B. P(E1,E2,E3)P(E1)/P(E2:E3)
  • C. P(E1,E2,E3)P(E2)P(E3)
  • D. P(E1,E2|E3)P(E3)
  • E. P(E1,E2;E3)/P(E2,E3)

Answer: E

Explanation:
Explanation
This is an application of conditional probability: P(E1,E2)=P(E1|E2)P(E2). so
P(E1|E2) = P(E1.E2)/P(E2)
P(E1,E2,E3)/P(E2,E3)
If the events are A and B respectively, this is said to be "the probability of A given B"
It is commonly denoted by P(A|B):or sometimes PB(A). In case that both "A" and "B" are categorical
variables, conditional probability table is typically used to represent the conditional probability.

 

NEW QUESTION 51
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