DSCI 5350 Exam 1 Questions With Explanations Of Answers Guaranteed Pass.
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DSCI
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DSCI
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...
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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