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DASCA Senior Data Scientist Sample Questions:

1. JSON takes hierarchical data structures and serializes them into:

A) Both A and B
B) Plain text format
C) None of the above
D) Any desired format
E) Plain string format

2. In regression, the principle of machine learning is used to optimize the parameters to:

A) Calculate the closest possible outcomes
B) Both A and B
C) Minimize the approximation error
D) None of the above

3. Which of the following is the most important part of Hadoop?

A) Both B and C
B) Both A and B
C) Spark Framework
D) Hadoop Distributed File System (HDFS)
E) MapReduce Framework

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

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

5. Spark programs can be written in:

A) All of the above
B) Python
C) Scala
D) None of the above
E) Java

Solutions: