DS-200 Exam Questions

Why is the naive Bayes classifier "naive"?

Which three metrics are useful in measuring the accuracy and quality of a recommender system?

Why should stop an interactive machine learning algorithm as soon as the performance of the model on a test set stops improving?

Refer to the exhibit. Which point in the figure is the median?

Under what two conditions does stochastic gradient descent outperform 2nd-order optimization techniques such as iteratively reweighted least squares?

Refer to the exhibit. Which point in the figure is the mode?

What is default delimiter for Hive tables?

Certain individuals are more susceptible to autism if they have particular combinations of genes expressed in their DNA. Given a sample of DNA from persons who have autism and a sa...

Refer to the exhibit. Which point in the figure is the mean?

You are working with a logistic regression model to predict the probability that a user will click on an ad. Your model has hundreds of features, and you're not sure if all of thos...

What is the most common reason for a k-means clustering algorithm to returns a sub-optimal clustering of its input?

There are 20 patients with acute lymphoblastic leukemia (ALL) and 32 patients with acute myeloid leukemia (AML), both variants of a blood cancer. The makeup of the groups as follow...

Which daemon spawns child JVMs to perform MapReduce processing?

What would be a reasonable configuration of disk drives in a Hadoop datanode?

How can the naivet?of the naive Bayes classifier be advantageous?

What are two defining features of RMSE (root-mean square error or root-mean-square deviation)?

What do you need to do when adding new slave nodes to a cluster?

Given the following sample of numbers from a distribution: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 What are two benefits of using the five-number summary of sample percentiles to summ...