Hortonworks HADOOP-PR000007 real exam prep : Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer)

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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer) Sample Questions:

1. Given a directory of files with the following structure:
line number, tab character, string:
Example:
1 abialkjfjkaoasdfjksdlkjhqweroij
2 kadfjhuwqounahagtnbvaswslmnbfgy
3 kjfteiomndscxeqalkzhtopedkfsikj
You want to send each line as one record to your Mapper. Which InputFormat should you use to complete
the line: conf.setInputFormat (____.class) ; ?

A) KeyValueFileInputFormat
B) SequenceFileAsTextInputFormat
C) SequenceFileInputFormat
D) BDBInputFormat

2. Assuming default settings, which best describes the order of data provided to a reducer's reduce method:

A) Both the keys and values passed to a reducer always appear in sorted order.
B) The keys given to a reducer aren't in a predictable order, but the values associated with those keys
always are.
C) Neither keys nor values are in any predictable order.
D) The keys given to a reducer are in sorted order but the values associated with each key are in no
predictable order

3. Which HDFS command displays the contents of the file x in the user's HDFS home directory?

A) hadoop fs -cat x
B) hadoop fs -Is x
C) hdfs fs -get x
D) hadoop fs -cp x

4. What is the disadvantage of using multiple reducers with the default HashPartitioner and distributing your
workload across you cluster?

A) By using multiple reducers with the default HashPartitioner, output files may not be in globally sorted
order.
B) You will longer be able to take advantage of a Combiner.
C) You will not be able to compress the intermediate data.
D) There are no concerns with this approach. It is always advisable to use multiple reduces.

5. Which one of the following statements describes the relationship between the ResourceManager and the
ApplicationMaster?

A) The ApplicationMaster starts an instance of the ResourceManager within each Container
B) The ApplicationMaster requests resources from the ResourceManager
C) The ApplicationMaster starts a single instance of the ResourceManager
D) The ResourceManager monitors and restarts any failed Containers of the ApplicationMaster

Solutions: