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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

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

1. 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 WritableComparable objects, in
sorted order.
C) A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous Writable objects
D) A SequenceFile contains a binary encoding of an arbitrary number of homogeneous Writable objects

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

A) You will longer be able to take advantage of a Combiner.
B) By using multiple reducers with the default HashPartitioner, output files may not be in globally sorted
order.
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.

3. 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) BDBInputFormat
C) SequenceFileAsTextInputFormat
D) SequenceFileInputFormat

4. Review the following data and Pig code.
M,38,95111 F,29,95060 F,45,95192 M,62,95102 F,56,95102
A = LOAD 'data' USING PigStorage('.') as (gender:Chararray, age:int,
zlp:chararray);
B = FOREACH A GENERATE age;
Which one of the following commands would save the results of B to a folder in hdfs named myoutput?

A) DUMP B using PigStorage('myoutput');
B) DUMP B INTO 'myoutput';
C) STORE A INTO 'myoutput' USING PigStorage(',');
D) STORE B INTO 'myoutput';

5. Your cluster's HDFS block size in 64MB. You have directory containing 100 plain text files, each of which
is 100MB in size. The InputFormat for your job is TextInputFormat. Determine how many Mappers will
run?

A) 200
B) 640
C) 100
D) 64

Solutions: