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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

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

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

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

2. Indentify which best defines a SequenceFile?

A) A SequenceFile contains a binary encoding of an arbitrary number key-value pairs. Each key must be
the same type. Each value must be the same type.
B) A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous Writable objects
C) A SequenceFile contains a binary encoding of an arbitrary number of homogeneous Writable objects
D) A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable objects, in
sorted order.

3. You've written a MapReduce job that will process 500 million input records and generated 500 million
key-value pairs. The data is not uniformly distributed. Your MapReduce job will create a significant
amount of intermediate data that it needs to transfer between mappers and reduces which is a potential
bottleneck. A custom implementation of which interface is most likely to reduce the amount of
intermediate data transferred across the network?

A) InputFormat
B) Combiner
C) Writable
D) WritableComparable
E) Partitioner
F) OutputFormat

4. 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) BDBInputFormat
B) SequenceFileAsTextInputFormat
C) SequenceFileInputFormat
D) KeyValueFileInputFormat

5. 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) There are no concerns with this approach. It is always advisable to use multiple reduces.
D) You will not be able to compress the intermediate data.

Solutions: