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DASCA SDS Exam Syllabus Topics:

DASCA Senior Data Scientist Sample Questions:

1. OCR (Optical Character Recognition) is an application used for:

A) Data mining
B) MapReduce
C) Machine learning
D) Big Data Analytics

2. Spark is written in:

A) C++
B) Python
C) Scala
D) C
E) Java

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

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

4. What is TRUE for "rehashing"?

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

5. Machine learning can be used in:

A) All of the above
B) Pattern and image recognition
C) Fraud detection
D) Real-time ads on web pages and mobile devices
E) Web search results

Solutions: