Developing MapReduce Applications MCQ question and answer with solution

1

What is the purpose of the Mapper class in a MapReduce application?

A) Generate intermediate key-value pairs B) Read and parse input data C) Aggregate values on the reducer side D) Execute MapReduce jobs

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Answer & Solution

Answer: Option A

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2

In a MapReduce job, what does the term "Reducer" refer to?

A) Task that processes the Map output B) Task that processes the Reduce output C) Task that processes the Map input D) Task that processes the Reduce input

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Answer & Solution

Answer: Option B

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3

What is the role of the Partitioner in a MapReduce application?

A) Distribute data across multiple nodes B) Sort and shuffle data C) Combine intermediate key-value pairs on the mapper side D) Determine the reducer for each key

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Answer & Solution

Answer: Option D

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4

In a MapReduce program, what is the purpose of the Hadoop Configuration object?

A) Manage computation resources B) Set job-level configurations C) Execute MapReduce jobs D) Read and parse input data

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Answer & Solution

Answer: Option B

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5

What is the primary function of the Reducer class in a MapReduce job?

A) Aggregate values on the reducer side B) Generate intermediate key-value pairs C) Execute MapReduce jobs D) Read and parse input data

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Answer & Solution

Answer: Option A

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6

What does the term "InputFormat" represent in the context of a MapReduce job?

A) Defines how input data is read B) Defines the map output format C) Defines the reduce output format D) Defines the partitioning logic

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Answer & Solution

Answer: Option A

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7

In a MapReduce program, what is the role of the Hadoop Job object?

A) Manages computation resources B) Manages task execution in MapReduce jobs C) Manages metadata of HDFS D) Executes MapReduce jobs

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Answer: Option D

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8

What is the significance of the Hadoop RecordReader in a MapReduce job?

A) Reads and parses input data B) Manages computation resources C) Executes MapReduce jobs D) Manages Hadoop ecosystem tools

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Answer & Solution

Answer: Option A

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9

In a MapReduce application, what is the purpose of the Hadoop OutputFormat?

A) Defines the map output format B) Defines the reduce output format C) Defines how input data is read D) Defines the partitioning logic

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Answer & Solution

Answer: Option B

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10

What is the role of the Hadoop JobClient in a MapReduce job?

A) Manage computation resources B) Manage task execution in MapReduce jobs C) Execute MapReduce jobs D) Manage Hadoop ecosystem tools

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Answer: Option C

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Developing MapReduce Applications MCQ question and answer with solution | Hadoop MCQs