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EMC Dell Data Science Foundations Sample Questions:

1. Which data type value is used for the observed response variable in a logistic regression model?

A) Any real number
B) A binary value
C) Any positive real number
D) Any integer

2. In K-means clustering, what is a graph of the WSS versus the value of K used to help determine?

A) Average distance between observations
B) Optimal distance between clusters
C) Average distance between clusters
D) 'Optimal number of clusters

3. Which two tools support query languages that can be used with Hadoop?

A) Hbase and Howl
B) Hive and Hbase
C) Hive and Pig
D) Pig and Howl

4. What is a key consideration when preparing a presentation intended for analysts?

A) Provide talking points to promote or evangelize the project
B) Describe how to implement the model
C) Focus on clean simple-to-understand visuals
D) Emphasize the business benefits of implementing the model

5. What is the primary function of the NameNode in Hadoop?

A) Acts as a regulator/resolver among clients and DataNodes
B) Monitors the state of each JobTracker node and signals an event if unavailable
C) Keeps track of which MapReduce jobs have been assigned to each TaskTracker
D) Runs some number of mapping tasks against its assigned data

Solutions: