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DASCA Senior Data Scientist Sample Questions:

1. Which of the following is correct?

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

2. What is TRUE for "rehashing"?

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

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

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

4. Which of the following is a DevOps Practice?

A) Continuous integration
B) Continuous delivery
C) Continuous build
D) All of the above

5. The grid computing environment uses a middleware to:

A) Combine computing resources
B) None of the above
C) Divide computing resources
D) Both A and B

Solutions: