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Quiz Databricks - Updated Databricks-Certified-Professional-Data-Engineer - Databricks Certified Professional Data Engineer Exam Valid Test Dumps

Download Databricks Certified Professional Data Engineer Exam Exam Dumps

NEW QUESTION 48
A data engineering manager has noticed that each of the queries in a Databricks SQL dashboard takes a few
minutes to update when they manually click the "Refresh" button. They are curious why this might be
occurring, so a team member provides a variety of reasons on why the delay might be occurring.
Which of the following reasons fails to explain why the dashboard might be taking a few minutes to update?

A. The queries attached to the dashboard might first be checking to determine if new data is availableB. The Job associated with updating the dashboard might be using a non-pooled endpointC. The SQL endpoint being used by each of the queries might need a few minutes to start upD. The queries attached to the dashboard might take a few minutes to run under normal circumstancesE. The queries attached to the dashboard might all be connected to their own, unstarted Databricks clusters

Answer: B

 

NEW QUESTION 49
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 real-time co-authoring on a single notebookB. Databricks Notebooks support commenting and notification commentsC. Databricks Notebooks support the use of multiple languages in the same notebookD. Databricks Notebooks support the creation of interactive data visualizationsE. Databricks Notebooks support automatic change-tracking and versioning

Answer: A

 

NEW QUESTION 50
A new data engineer [email protected] has been assigned to an ELT project. The new data
engineer will need full privileges on the table sales to fully manage the project.
Which of the following commands can be used to grant full permissions on the table to the new data engineer?

A. 1. GRANT SELECT ON TABLE sales TO [email protected];B. 1. GRANT SELECT CREATE MODIFY ON TABLE sales TO [email protected];C. 1. GRANT USAGE ON TABLE sales TO [email protected];D. 1. GRANT ALL PRIVILEGES ON TABLE [email protected] TO sales;E. 1. GRANT ALL PRIVILEGES ON TABLE sales TO [email protected];

Answer: E

 

NEW QUESTION 51
Consider flipping a coin for which the probability of heads is p, where p is unknown, and our goa is to
estimate p. The obvious approach is to count how many times the coin came up heads and divide by the total
number of coin flips. If we flip the coin 1000 times and it comes up heads 367 times, it is very reasonable to
estimate p as approximately 0.367. However, suppose we flip the coin only twice and we get heads both times.
Is it reasonable to estimate p as 1.0? Intuitively, given that we only flipped the coin twice, it seems a bit
rash to conclude that the coin will always come up heads, and____________is a way of avoiding such rash
conclusions.

A. Linear RegressionB. Laplace SmoothingC. Logistic RegressionD. Naive Bayes

Answer: B

Explanation:
Explanation
Smooth the estimates:consider flipping a coin for which the probability of heads is p, where p is unknown, and
our goal is to estimate p. The obvious approach is to count how many times the coin came up heads and divide
by the total number of coin flips. If we flip the coin 1000 times and it comes up heads 367 times, it is very
reasonable to estimate p as approximately 0.367. However, suppose we flip the coin only twice and we get
heads both times. Is it reasonable to estimate p as 1.0? Intuitively, given that we only flipped the coin twice, it
seems a bit rash to conclude that the coin will always come up heads, and smoothing is a way of avoiding such
rash conclusions. A simple smoothing method, called Laplace smoothing (or Laplace's law of succession or
add-one smoothing in R&N), is to estimate p by (one plus the number of heads) / (two plus the total number of
flips). Said differently, if we are keeping count of the number of heads and the number of tails, this rule is
equivalent to starting each of our counts at one, rather than zero. Another advantage of Laplace smoothing is
that it avoids estimating any probabilities to be zero, even for events never observed in the data. Laplace
add-one smoothing now assigns too much probability to unseen words

 

NEW QUESTION 52
In which phase of the data analytics lifecycle do Data Scientists spend the most time in a project?

A. Model BuildingB. Data PreparationC. Communicate ResultsD. Discovery

Answer: B

 

NEW QUESTION 53
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