Hadoop MCQs with answers Page - 146

Here, you will find a collection of MCQ questions on Hadoop. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

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Q. What is the output of Mapper?

  • (A) Final result
  • (B) Key-value pairs
  • (C) Sorted data
  • (D) Database records

A

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Q. Which interface is used to define Mapper logic?

  • (A) Reducer
  • (B) Mapper
  • (C) Driver
  • (D) InputFormat

A

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Q. What is the role of Reducer?

  • (A) Split data
  • (B) Aggregate intermediate results
  • (C) Store data
  • (D) Allocate resources

A

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Q. Which phase sorts data in MapReduce?

  • (A) Map
  • (B) Shuffle and Sort
  • (C) Reduce
  • (D) Input

A

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Q. What is the purpose of partitioner?

  • (A) Store data
  • (B) Divide keys among reducers
  • (C) Execute tasks
  • (D) Compress files

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Q. What is the default number of reducers?

  • (A) 0
  • (B) 1
  • (C) 2
  • (D) Depends on cluster

A

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Q. Which compression is splittable?

  • (A) Gzip
  • (B) Bzip2
  • (C) Zip
  • (D) RAR

A

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Q. What is the purpose of Distributed Cache?

  • (A) Store data
  • (B) Cache files across nodes
  • (C) Run jobs
  • (D) Monitor cluster

A

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Q. Which component tracks job progress in Hadoop 1.x?

  • (A) NameNode
  • (B) JobTracker
  • (C) NodeManager
  • (D) ResourceManager

A

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Q. Which is NOT a scheduler type in YARN?

  • (A) FIFO
  • (B) Fair
  • (C) Capacity
  • (D) Priority Round

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