Hortonworks Exam HDPCD Topic 1 Question 59 Discussion

Actual exam question for Hortonworks's HDPCD exam

Question #: 59
Topic #: 1

[All HDPCD Questions]

Which one of the following statements is true regarding a MapReduce job?

AThe job's Partitioner shuffles and sorts all (key.value) pairs and sends the output to all reducers

BThe default Hash Partitioner sends key value pairs with the same key to the same Reducer

CThe reduce method is invoked once for each unique value

DThe Mapper must sort its output of (key.value) pairs in descending order based on value

Show Suggested Answer

Suggested Answer: A

by Julio at Jun 19, 2024, 06:50 PM

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Leota

9 months ago

I'm not sure, but I think B) hadoop -cp foo LocalFoo could also be a possible answer.

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Selma

9 months ago

I disagree, I believe the correct answer is D) hadoop fs -put foo LocalFoo.

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Tijuana

9 months ago

I'm feeling confident about Option A. It's the only one that mentions 'get', which is the HDFS command for downloading files.

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9 months ago

This is a tricky one, but I'm going with Option B. The 'cp' command should work for copying files, right?

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Vilma

9 months ago

I'm not sure, but I think 'cp' is the right command for copying files in HDFS.

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Pedro

9 months ago

I think Option B is correct too. 'cp' is usually used for copying files.

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Lenna

10 months ago

I think the answer is A) hadoop fs -get foo LocalFoo.

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Vallie

10 months ago

I think Option D is the correct answer. The 'put' command is used to copy files from the local filesystem to HDFS.

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Julianna

10 months ago

Option A looks good to me. The 'get' command is used to copy files from HDFS to the local filesystem.

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Jillian

9 months ago

Yes, 'hadoop fs -get foo LocalFoo' is the command to copy from HDFS to the local filesystem.

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Shenika

9 months ago

I think option A is the correct one.

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