MapReduce Programming Model MCQ question and answer with solution

31

Point out the wrong statement.

A) EMC Isilon Scale-out Storage Solutions for Hadoop combine a powerful yet simple and highly efficient storage platform B) Isilon native HDFS integration means you can avoid the need to invest in a separate Hadoop infrastructure C) NoSQL systems do provide high latency access and accommodate less concurrent users D) None of the mentioned

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Answer & Solution

Answer: Option C

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32

The . . . . . . . . option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.

A) archives B) files C) task D) none of the mentioned

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Answer & Solution

Answer: Option A

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33

Mapper implementations are passed the JobConf for the job via the . . . . . . . . method.

A) JobConfigure.configure B) JobConfigurable.configure C) JobConfigurable.configurable D) None of the mentioned

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Answer & Solution

Answer: Option B

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34

Although the Hadoop framework is implemented in Java, MapReduce applications need not be written in . . . . . . . .

A) Java B) C C) C# D) None of the mentioned

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Answer & Solution

Answer: Option A

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35

Running a . . . . . . . . program involves running mapping tasks on many or all of the nodes in our cluster.

A) MapReduce B) Map C) Reducer D) All of the mentioned

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Answer & Solution

Answer: Option A

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36

Which is the most popular NoSQL database for scalable big data store with Hadoop?

A) Hbase B) MongoDB C) Cassandra D) None of the mentioned

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Answer & Solution

Answer: Option A

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37

The number of maps is usually driven by the total size of . . . . . . . .

A) inputs B) outputs C) tasks D) None of the mentioned

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Answer & Solution

Answer: Option A

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38

Input to the . . . . . . . . is the sorted output of the mappers.

A) Reducer B) Mapper C) Shuffle D) All of the mentioned

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Answer & Solution

Answer: Option A

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39

A . . . . . . . . node acts as the Slave and is responsible for executing a Task assigned to it by the JobTracker.

A) MapReduce B) Mapper C) TaskTracker D) JobTracker

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Answer & Solution

Answer: Option C

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40

Point out the wrong statement.

A) Reducer has 2 primary phases B) Increasing the number of reduces increases the framework overhead, but increases load balancing and lowers the cost of failures C) It is legal to set the number of reduce-tasks to zero if no reduction is desired D) The framework groups Reducer inputs by keys (since different mappers may have output the same key) in the sort stage

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Answer & Solution

Answer: Option A

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