Online Access Free Databricks-Certified-Professional-Data-Scientist Exam Questions

Marie is getting married tomorrow, at an outdoor ceremony in the desert. In recent years, it has rained only 5 days each year. Unfortunately, the weatherman has predicted rain for tomorrow. When it actually rains, the weatherman correctly forecasts rain 90% of the time. When it doesn't rain, he incorrectly forecasts rain 10% of the time. Which of the following will you use to calculate the probability whether it will rain on the day of Marie's wedding?

• A.All of the above
• B.Random Decision Forests
• C.Logistic Regression
• D.Naive Bayes

You are creating a model for the recommending the book at Amazon.com, so which of the following recommender system you will use you don't have cold start problem?

• A.Content-based filtering
• B.Item-based collaborative filtering
• C.User-based collaborative filtering
• D.Naive Bayes classifier

Refer to exhibit

You are asked to write a report on how specific variables impact your client's sales using a data set provided to you by the client. The data includes 15 variables that the client views as directly related to sales, and you are restricted to these variables only. After a preliminary analysis of the data, the following findings were made: 1.
Multicollinearity is not an issue among the variables 2. Only three variables-A, B, and C-have significant correlation with sales You build a linear regression model on the dependent variable of sales with the independent variables of A, B, and C.
The results of the regression are seen in the exhibit. You cannot request additional data. what is a way that you could try to increase the R2 of the model without artificially inflating it?

• A.Break variables A, B, and C into their own univariate models
• B.Create clusters based on the data and use them as model inputs
• C.Force all 15 variables into the model as independent variables
• D.Create interaction variables based only on variables A, B, and C

Which of the following are point estimation methods?

• A.MMSE
• B.MAP
• C.MLE

Which of the following could be features?

• A.Words in the document
• B.All 1,2 and 3 are possible
• C.Characteristics of an unidentified object
• D.Symptoms of a diseases
• E.0nly 1 and 2