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DASCA Senior Data Scientist Sample Questions:

1. Which of the following is correct about customer lifetime value (CLTV)?
i. Most organizations determine the current customer lifetime value (CLTV) based on historic sales over past
12 to 18 months
ii. The goal of the CLTV score is to help marketing and store personnel to determine the "value" of a customer

A) Both i and ii
B) Only ii
C) Only i

2. Which of the following is NOT a correct situation to use Agile?

A) None of the above
B) When the final product isn't clearly defined
C) When changes need to be implemented during the entire process
D) When clients/stakeholders need to be able to change the scope

3. Which of the following is NOT Structured data?

A) XML
B) Relational databases
C) None of the above
D) CSV files
E) Data tables

4. Which of the following is NOT a process of Use Case?

A) Identify your key business stakeholders
B) Understand your organization's key business initiatives or business challenge
C) Brainstorm the outcomes that the key stakeholders need to answer to facilitate making the decisions
D) Capture the decisions that the key business stakeholders need to make in order to support the organization's key business initiatives
E) Brainstorm the questions that the key stakeholders need to answer to facilitate making the decisions

5. Which of the following statements is correct?

A) 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
B) 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
C) 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
D) 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

Solutions: