Free Databricks Databricks-Certified-Professional-Data-Scientist Exam Dumps Questions & Answers

Which of the following is a Continuous Probability Distributions?

• A.  Poisson probability distribution
• B.  Normal probability distribution
• C.  Binomial probability distribution
• D.  Negative binomial distribution

If E1 and E2 are two events, how do you represent the conditional probability given that E2 occurs given that E1 has occurred?

• A.  P(E2)/P(E1)
• B.  P(E1)/P(E2)
• C.  P(E2)/(P(E1+E2)
• D.  P(E1+E2)/P(E1)

The figure below shows a plot of the data of a data matrix M that is 1000 x 2. Which line represents the first principal component?

• A.  yellow
• B.  Neither
• C.  blue

Suppose A, B , and C are events. The probability of A given B , relative to P(|C), is the same as the probability of A given B and C (relative to P ). That is,

• A.  P(A,B|C) P(B|C) =P(C|B,C)
• B.  P(A,B|C) P(B|C) =P(B|A,C)
• C.  P(A,B|C) P(B|C) =P(A|B,C)
• D.  P(A,B|C) P(B|C) =P(A|C,B)

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.  Logistic Regression
• B.  Naive Bayes classifier
• C.  Collaborative filtering
• D.  Content-based filtering