Databricks-Certified-Professional-Data-Scientist Practice Online

Question 1

In unsupervised learning which statements correctly applies

A : It does not have a target variable

B : Instead of telling the machine Predict Y for our data X, we're asking What can you tell me about X?

C : telling the machine Predict Y for our data X

Answer: A,B

Question 2

Select the choice where Regression algorithms are not best fit

A : When the dimension of the object given

B : Weight of the person is given

C : Temperature in the atmosphere

D : Employee status

Answer: D

Question 3

Question-34. Stories appear in the front page of Digg as they are "voted up" (rated positively) by the

community. As the community becomes larger and more diverse, the promoted stories can better reflect the

average interest of the community members. Which of the following technique is used to make such

recommendation engine?

A : Naive Bayes classifier

B : Collaborative filtering

C : Logistic Regression

D : Content-based filtering

Answer: B

Question 4

You are working on a Data Science project and during the project you have been gibe a responsibility to interview all the stakeholders in the project. In which phase of the project you are?

A : Discovery

B : Data Preparations

C : Creating Models

D : Executing Models

E : Creating visuals from the outcome

F : Operationnalise the models

Answer: A

Question 5

Assume some output variable "y" is a linear combination of some independent input variables "A" plus some

independent noise "e". The way the independent variables are combined is defined by a parameter vector B

y=AB+e where X is an m x n matrix. B is a vector of n unknowns, and b is a vector of m values. Assuming

that m is not equal to n and the columns of X are linearly independent, which expression correctly solves for

B?

A :

B :

C :

D :

Answer: D

Name:	Databricks Certified Professional Data Scientist
Exam Code:	Databricks-Certified-Professional-Data-Scientist
Certification:	Databricks Certified Professional
Vendor:	Databricks
Total Questions:	140
Last Updated:	May 15, 2024

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