Databricks-Certified-Professional-Data-Scientist Practice Exam Questions and Answers

Which of the following statement is true for the R square value in the regression model?

Google Adwords studies the number of men, and women, clicking the advertisement on search

engine during the midnight for an hour each day.

Google find that the number of men that click can be modeled as a random variable with distribution

Poisson(X), and likewise the number of women that click as Poisson(Y).

What is likely to be the best model of the total number of advertisement clicks during the midnight for an hour ?

You are using k-means clustering to classify heart patients for a hospital. You have chosen Patient Sex, Height, Weight, Age and Income as measures and have used 3 clusters. When you create a pair-wise plot of the clusters, you notice that there is significant overlap between the clusters. What should you do?

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

Classification and regression are examples of___________.

Which is an example of supervised learning?

Question-18. What is the best way to ensure that the k-means algorithm will find a good clustering of a collection of vectors?

A denote the event 'student is female' and let B denote the event 'student is French'. In a class of 100 students suppose 60 are French, and suppose that 10 of the French students are females. Find the probability that if I pick a French student, it will be a girl, that is, find P(A|B).

In which lifecycle stage are test and training data sets created?

Suppose you have been given a relatively high-dimension set of independent variables and you are asked to come up with a model that predicts one of Two possible outcomes like "YES" or "NO", then which of the following technique best fit.

What describes a true property of Logistic Regression method?

In which of the following scenario you should apply the Bay's Theorem

A researcher is interested in how variables, such as GRE (Graduate Record Exam scores), GPA (grade point average) and prestige of the undergraduate institution, effect admission into graduate school. The response variable, admit/don't admit, is a binary variable.

Above is an example of

You are using one approach for the classification where to teach the agent not by giving explicit categorizations, but by using some sort of reward system to indicate success, where agents might be rewarded for doing certain actions and punished for doing others. Which kind of this learning

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

Select the correct option which applies to L2 regularization

Which of the following is a Continuous Probability Distributions?

Your company has organized an online campaign for feedback on product quality and you have all the responses for the product reviews, in the response form people have check box as well as text field. Now you know that people who do not fill in or write non-dictionary word in the text field are not considered valid feedback. People who fill in text field with proper English words are considered valid response. Which of the following method you should not use to identify whether the response is valid or not?

Which of the following skills a data scientists required?

Which of the following is a correct example of the target variable in regression (supervised learning)?