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DASCA Senior Data Scientist Sample Questions:

1. Which of the following errors refers to the wrong negation of a true null hypothesis?

A) Logical Error
B) Type II Error
C) Hypothesis Error
D) None of the above
E) Type I Error

2. What is TRUE for "rehashing"?

A) It requires a new hash function, which maps values into a larger range of integers
B) Key/value pairs from the original table can be inserted into the new, larger one
C) All of the above
D) Both A and B
E) Allocate a new, larger hash table in memory

3. Which of the following can be classified as factor analysis in machine learning?

A) None of the above
B) Confirmatory factor analysis
C) Both A and B
D) Exploratory factor analysis

4. The spokes of the "Hub and Spoke" analytics architecture are the analytic use cases or applications that help the organization to optimize:

A) Uncover new monetization opportunities
B) All of the above
C) Both A and B
D) Key business processes
E) Deliver a more compelling customer experience

5. Which of the following is TRUE for data lake?

A) The data lake can make both of the Business Intelligence and Data Science environments less agile and more productive
B) None of the above
C) The data lake enables organizations to treat data as an organizational asset to be gathered and nurtured versus a cost to be minimized
D) The data lake can make both of the Business Intelligence and Data Science environments more agile and more productive
E) The data lake enables organizations to gather, manage, enrich, and analyze many new sources of data, whether structured or unstructured

Solutions: