CompTIA DY0-001 Exam Questions - Real Practice Questions for Guaranteed Success

Question 1

A data scientist observes findings that indicate that as electrical grids in a country become more and more connected over time, the frequency of brownouts and blackouts in total decrease, and the frequency of major brownouts and blackouts increase. Which of the following distribution metrics could best be identified?

AScale axis magnitudes

BKurtosis

CSkewness

DNormality

Correct : B

Kurtosis quantifies how heavy or light the tails of a distribution are. In this case, fewer overall events but more extreme (major) brownouts/blackouts indicates heavier tails over time. This is exactly what an increasing kurtosis would reveal.

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AScale axis magnitudes

BKurtosis

CSkewness

DNormality

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Question 3

Which of the following explains back propagation?

AThe passage of convolutions backward through a neural network to update weights and biases

BThe passage of accuracy backward through a neural network to update weights and biases

CThe passage of nodes backward through a neural network to update weights and biases

DThe passage of errors backward through a neural network to update weights and biases

Correct : D

Back propagation computes the gradient of the loss (error) with respect to each weight by propagating the error signal backward through the network, then uses those gradients to adjust weights and biases.

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AThe passage of convolutions backward through a neural network to update weights and biases

BThe passage of accuracy backward through a neural network to update weights and biases

CThe passage of nodes backward through a neural network to update weights and biases

DThe passage of errors backward through a neural network to update weights and biases

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Question 4

A data scientist is merging two tables. Table 1 contains employee IDs and roles. Table 2 contains employee IDs and team assignments. Which of the following is the best technique to combine these data sets?

Ainner join between Table 1 and Table 2

Bleft join on Table 1 with Table 2

Cright join on Table 1 with Table 2

Douter join between Table 1 and Table 2

Correct : A

An INNER JOIN merges records only where the employee ID exists in both tables, yielding a single combined table of each employee's role paired with their team assignment.

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Ainner join between Table 1 and Table 2

Bleft join on Table 1 with Table 2

Cright join on Table 1 with Table 2

Douter join between Table 1 and Table 2

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Question 5

A data scientist trained a model for departments to share. The departments must access the model using HTTP requests. Which of the following approaches is appropriate?

AUtilize distributed computing.

BDeploy containers.

CCreate an endpoint.

DUse the File Transfer Protocol.

Correct : C

Exposing the model behind an HTTP endpoint (for example, a REST API) allows other departments to send requests and receive predictions directly over HTTP. The other options don't inherently provide a request--response interface for sharing a model.

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AUtilize distributed computing.

BDeploy containers.

CCreate an endpoint.

DUse the File Transfer Protocol.

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