Hadoop Streaming Uses the Standard Input and Standard Output Streams

question 5

Multiple Choice

Hadoop streaming uses the standard input and standard output streams as follows:

• A) Hadoop supplies the input to the mapping script-called the mapper. This script reads its input from the standard input stream. The mapper writes its results to the standard output stream.
• B) Hadoop supplies the mapper's output as the input to the reduction script-called the reducer-which reads from the standard input stream.
• C) The reducer writes its results to the standard output stream. Hadoop writes the reducer's output to the Hadoop file system (HDFS).
• D) All of the above statements are true.

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Definitions:

Early Childhood

The period of human development from birth to about 8 years of age, encompassing significant milestones in physical, social, emotional, and cognitive growth.

Preschooler

A child typically between the ages of 3 and 5 years, who is not yet of school age.

Preschool Years

The period in a child's life prior to attending kindergarten, roughly between the ages of 3 and 5, when they may attend preschool to begin early education.

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A school for the early years of a child's education, typically encompassing grades kindergarten through 5 or 6 in the United States.