MapReduce Programming Model MCQ question and answer with solution

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What is the function of the MapReduce "Shuffle" phase?

A) Data compression B) Data distribution to reducers C) Data sorting and grouping D) Data storage in HBase

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

What does the term "Combiner" represent in the context of MapReduce?

A) Data compression B) Combine intermediate key-value pairs on the mapper side C) Aggregate values on the reducer side D) Data sorting and grouping

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Answer & Solution

Answer: Option B

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What does the MapReduce "Reducer" function do?

A) Process input key-value pairs B) Sort and shuffle data C) Aggregate values D) Distribute data across nodes

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Answer & Solution

Answer: Option C

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What is the role of the Hadoop JobTracker in MapReduce?

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 & Solution

Answer: Option B

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What is the significance of the MapReduce "Map" phase?

A) Distribute data to reducers B) Process input key-value pairs C) Sort and shuffle data D) Aggregate values on the reducer side

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Answer & Solution

Answer: Option B

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In MapReduce, what is the purpose of the "InputSplit"?

A) Determine the reducer for each key B) Defines the map output format C) Defines the reduce output format D) Defines how input data is read

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Answer & Solution

Answer: Option D

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What is the role of the Hadoop Secondary NameNode in MapReduce?

A) Store a backup of the entire HDFS metadata B) Manage computation resources C) Failover for the NameNode D) Manage ZooKeeper configurations

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Answer & Solution

Answer: Option B

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What is the function of the MapReduce "Combine" phase?

A) Aggregate values on the reducer side B) Combine intermediate key-value pairs on the mapper side C) Sort and shuffle data D) Distribute data to reducers

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

What is the primary purpose of the MapReduce "Sort and Shuffle" phase?

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

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

What is the purpose of the MapReduce "InputFormat"?

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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MapReduce Programming Model MCQ question and answer with solution | Hadoop MCQs