In the context of big data, what is the purpose of "data sampling"?
A. To increase data volume
B. To reduce data variety
C. To decrease data velocity
D. To obtain a representative subset of data
Answer: Option D
A. To increase data volume
B. To reduce data variety
C. To decrease data velocity
D. To obtain a representative subset of data
Answer: Option D
What is the primary characteristic of "big data"?
A. Small volume of data
B. High velocity of data
C. Variety of data sources
D. Low complexity of data
In the context of big data, what does the "3Vs" represent?
A. Velocity, Value, Variability
B. Volume, Variety, Velocity
C. Volume, Value, Variety
D. Velocity, Veracity, Variety
A. Java
B. Python
C. Hadoop
D. SQL
What is the main purpose of the Hadoop Distributed File System (HDFS) in a Hadoop ecosystem?
A. Real-time data processing
B. Data storage and retrieval
C. Data visualization
D. Data encryption
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