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DASCA Senior Data Scientist Sample Questions:

1. Which of the following is correct for Markov chain?

A) Both B and C
B) A Markov chain is a sequence of fixed variables X1, X2
C) A Markov chain is the state of a system at sequential points in time
D) A Markov chain is a sequence of random variables X1, X2
E) Both A and B

2. The DevOps movement is an outgrowth of which of the following software development methodologies?

A) Agile
B) Waterfall
C) Promise-based algorithms
D) Test-driven development and model-driven development

3. Which of the following is correct?

A) All of the above
B) DataFrame is similar to SQL tables or R data frames
C) The central object in Pandas is called a DataFrame
D) A data frame is a table with rows and columns
E) Both A and B

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

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

5. Which of the following is TRUE about Avro?

A) None of the above
B) Avro is a data serialization framework
C) Both A and B
D) Avro is based on Remote Procedure Call (RPC)

Solutions: