Databricks Certified Professional Data Scientist - Databricks-Certified-Professional-Data-Scientist Exam Questions

QUESTION NO: 1
A website is opened 3 times by a user. What is the probability of he clicks 2 times the advertisement, is best calculated by

QUESTION NO: 2
In which phase of the data analytics lifecycle do Data Scientists spend the most time in a project?

QUESTION NO: 3
Scenario: Suppose that Bob can decide to go to work by one of three modes of transportation, car, bus, or commuter train. Because of high traffic, if he decides to go by car. there is a 50% chance he will be late. If he goes by bus, which has special reserved lanes but is sometimes overcrowded, the probability of being late is only 20%. The commuter train is almost never late, with a probability of only 1 %, but is more expensive than the bus.
Suppose that Bob is late one day, and his boss wishes to estimate the probability that he drove to work that day by car. Since he does not know Which mode of transportation Bob usually uses, he gives a prior probability of
1 3 to each of the three possibilities. Which of the following method the boss will use to estimate of the probability that Bob drove to work?

QUESTION NO: 4
Which of the following question statement falls under data science category?

QUESTION NO: 5
You are building a classifier off of a very high-dimensiona data set similar to shown in the image with 5000 variables (lots of columns, not that many rows). It can handle both dense and sparse input. Which technique is most suitable, and why?

QUESTION NO: 6
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
?

QUESTION NO: 7
Select the correct option from the below

QUESTION NO: 8
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,