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Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

1. 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?

A) 0
B) 3
C) 6
D) 1
E) 5

2. Which one of the following is NOT a valid Oozie action?

A) mrunit
B) mapreduce
C) hive
D) pig

3. Indentify the utility that allows you to create and run MapReduce jobs with any executable
or script as the mapper and/or the reducer?

A) Hadoop Streaming
B) mapred
C) Sqoop
D) Flume
E) Oozie

4. When is the earliest point at which the reduce method of a given Reducer can be called?

A) As soon as a mapper has emitted at least one record.
B) As soon as at least one mapper has finished processing its input split.
C) It depends on the InputFormat used for the job.
D) Not until all mappers have finished processing all records.

5. What is the term for the process of moving map outputs to the reducers?

A) Shuffling and sorting
B) Combining
C) Reducing
D) Partitioning

Solutions: