Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer - Apache-Hadoop-Developer Exam Practice Test
You have written a Mapper which invokes the following five calls to the OutputColletor.collect method:
output.collect (new Text ("Apple"), new Text ("Red") ) ;
output.collect (new Text ("Banana"), new Text ("Yellow") ) ;
output.collect (new Text ("Apple"), new Text ("Yellow") ) ;
output.collect (new Text ("Cherry"), new Text ("Red") ) ;
output.collect (new Text ("Apple"), new Text ("Green") ) ;
How many times will the Reducer's reduce method be invoked?
output.collect (new Text ("Apple"), new Text ("Red") ) ;
output.collect (new Text ("Banana"), new Text ("Yellow") ) ;
output.collect (new Text ("Apple"), new Text ("Yellow") ) ;
output.collect (new Text ("Cherry"), new Text ("Red") ) ;
output.collect (new Text ("Apple"), new Text ("Green") ) ;
How many times will the Reducer's reduce method be invoked?
Correct Answer: D
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Indentify which method in the Mapper you should use to implement code for reading the file and populating the associative array?
Correct Answer: A
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To use a lava user-defined function (UDF) with Pig what must you do?
Correct Answer: C
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What is the disadvantage of using multiple reducers with the default HashPartitioner and distributing your workload across you cluster?
Correct Answer: B
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Indentify the utility that allows you to create and run MapReduce jobs with any executable
or script as the mapper and/or the reducer?
or script as the mapper and/or the reducer?
Correct Answer: C
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Consider the following two relations, A and B.
What is the output of the following Pig commands?
X = GROUP A BY S1; DUMP X;
What is the output of the following Pig commands?
X = GROUP A BY S1; DUMP X;
Correct Answer: C
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