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The 3Vs in the definition of Big Data stand for: A: Volume, Value, Veracity B: Volume, Variety, Value C: Volume, Variety, Velocity - correct answer C: Volume, Variety, Velocity The four stages in Big Data adoption identified by the 2012 IBM/University of...

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  • October 4, 2024
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  • 2024/2025
  • Exam (elaborations)
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DSCI 5350 Exam 1

The 3Vs in the definition of Big Data stand for:



A: Volume, Value, Veracity

B: Volume, Variety, Value

C: Volume, Variety, Velocity - correct answer C: Volume, Variety, Velocity



The four stages in Big Data adoption identified by the 2012 IBM/University of Oxford report DO NOT
include:



A: Educate

B: Expect

C: Engage

D: Execute - correct answer B: Expect



The main sponsor(s) in the "Execute" stage of big data adoption is/are:



A: The customers

B: The analysts and mid-level managers

C: The Chief Information Officer (CIO)

D: The Chief Executive Officer (CEO) - correct answer D: The Chief Executive Officer
(CEO)



The main obstacle in the "Execute" stage of big data adoption is:



A: Lack of technical skills

B: Lack of management focus

,C: Inability to understand how to use big data

D: Inability to understand the market - correct answer A: Lack of technical skills



Which one of the following analytics practices corresponds to the NEW approach in big data analytics?



A: Analyze small, clean subsets of data

B: Analyze all data, even if they are not clean

C: Start with a hypothesis and test on selected data

D: Analyze data after they have been organized in a data warehouse - correct answer
B: Analyze all data, even if they are not clean



Which function should be used to calculate the total of all values in a column?



A: Count

B: Sum

C: Total - correct answer B: Sum



Based on the following table description, use SQL to list the complete STUDENT table.

STUDENT[StudentID, FirstName, LastName, Street, City, State, Zip]



A: SELECT all from STUDENT;

B: LIST all from STUDENT;

C: SELECT * from STUDENT; - correct answer C: SELECT * from STUDENT;



Traditional ("existing") Data Analytics architecture is designed based on the assumption that we already
know the questions we are trying to answer



TRUE

FALSE - correct answer TRUE

, Which one of the following is NOT a characteristic of Hadoop?



A: Distributed

B: Scalable

C: Fault-tolerant

D: Proprietary - correct answer D: Proprietary



In the Hadoop ecosystem, which application is designed for collecting data from network sources?

A: Flume

B: Sqoop

C: HBase

D: Zookeeper - correct answer A: Flume



What is the MapReduce strategy for executing complex analytic tasks?



A: Relies on sophisticated hardware that accelerates computation speed

B: Breaks them down into smaller, simpler tasks that can be executed in parallel

C: Loads the entire task onto one large machine that can fit all the data - correct answer
B: Breaks them down into smaller, simpler tasks that can be executed in parallel



In the HDFS architecture diagram below, entity W is a:

A. Node

B. Block

C. Name node - correct answer C. Name node



Apache Zookeeper is a:

A: Data manipulation language

B: Set of Web applications that interface with Hadoop

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