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DASCA Senior Data Scientist Sample Questions:

1. Which of these are open-source column-oriented databases?

A) Cassandra
B) Accumulo
C) Both A and B
D) All of the above
E) HBase

2. Which of the following statements is correct?

A) Apache claimed that Spark is able to run parallel jobs 1000 times faster in memory and 100 times faster on disk in comparison to the traditional Hadoop MapReduce
B) Apache claimed that Spark is able to run parallel jobs 50 times faster in memory and 5 times faster on disk in comparison to the traditional Hadoop MapReduce
C) Apache claimed that Spark is able to run parallel jobs 100 times faster in memory and 10 times faster on disk in comparison to the traditional Hadoop MapReduce
D) Apache claimed that Spark is able to run parallel jobs 10 times faster in memory and 100 times faster on disk in comparison to the traditional Hadoop MapReduce

3. Data wrangling is the process of getting the data from:

A) Both A and B
B) None of the above
C) Its raw format into something suitable for more conventional analytics
D) Its modified meaning format into something suitable for more conventional analytics

4. Which of the following is main Machine Learning Library in Python?

A) Matplotlib
B) None of the above
C) NumPy
D) SciPy
E) Scikit-learn

5. Self-driving car is an example of:

A) All of the above
B) Unsupervised learning
C) Supervised learning
D) Reinforcement learning

Solutions: