Hortonworks Exam HDPCD Topic 2 Question 58 Discussion

Actual exam question for Hortonworks's HDPCD exam

Question #: 58
Topic #: 2

Can you use MapReduce to perform a relational join on two large tables sharing a key? Assume that the two tables are formatted as comma-separated files in HDFS.

AYes.

BYes, but only if one of the tables fits into memory

CYes, so long as both tables fit into memory.

DNo, MapReduce cannot perform relational operations.

ENo, but it can be done with either Pig or Hive.

Show Suggested Answer

Suggested Answer: C

by Oneida at Jun 02, 2024, 08:44 PM

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Shay

10 months ago

I'm confident it's C. 'hadoop fs -cat x' is the classic command for displaying file contents in HDFS. Easy peasy!

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Noah

10 months ago

Yes, 'hadoop fs -cat x' is the classic command for that.

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Tommy

10 months ago

I agree, 'hadoop fs -cat x' is the right command to display file contents in HDFS.

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Jerilyn

10 months ago

Haha, this is a trick question! The real answer is A - 'hadoop fs -Is x' shows the file listing, not the contents. Nice try, exam writers!

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Tarra

10 months ago

Actually, it's a trick question. The correct answer is A - 'hadoop fs -Is x'.

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Madonna

10 months ago

Me too, but I think the answer is C - 'hadoop fs -cat x'.

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Lizette

10 months ago

I always get confused with HDFS commands.

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Steffanie

11 months ago

I agree with Noelia, because the 'cat' command is used to display the contents of a file.

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Cruz

11 months ago

I'm going with D. 'hadoop fs -cp x' must be the way to copy the file, right? That's gotta be it.

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Marshall

10 months ago

Oh, I see. Thanks for the clarification. I'll remember to use 'hadoop fs -cat x' next time.

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Elinore

10 months ago

The correct command to display the contents of a file in HDFS is 'hadoop fs -cat x'.

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Wilda

10 months ago

No, that's not correct. 'hadoop fs -cp x' is used to copy files, not display the contents.

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Noelia

11 months ago

I think the answer is C) hadoop fs -cat x.

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Malcom

11 months ago

Hmm, I'm not sure about this one. Maybe it's B? 'hdfs fs -get x' sounds like it could display the file contents.

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Isreal

11 months ago

I think the answer is C. The 'hadoop fs -cat x' command displays the contents of the file x in the user's HDFS home directory.

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Ivory

10 months ago

Yes, that command will display the contents of the file x in the user's HDFS home directory.

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Vi

10 months ago

No, it's C) hadoop fs -cat x for sure

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Cathrine

10 months ago

I think it's A) hadoop fs -ls x

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Willard

10 months ago

I agree, the correct answer is C) hadoop fs -cat x.

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Johnetta

10 months ago

Yes, 'hadoop fs -cat x' is the command to display the contents of the file x in the user's HDFS home directory.

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Teddy

11 months ago

I agree, the correct answer is C) hadoop fs -cat x.

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Audria

11 months ago

I agree, the correct answer is C) hadoop fs -cat x

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