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

1. Assuming the following Hive query executes successfully:

Which one of the following statements describes the result set?

A) A bigram of the top 80 sentences that contain the substring "you are" in the lines column of the input
data A1 table.
B) A trigram of the top 80 sentences that contain "you are" followed by a null space in the lines column of
the inputdata table.
C) An 80-value ngram of sentences that contain the words "you" or "are" in the lines column of the
inputdata table.
D) A frequency distribution of the top 80 words that follow the subsequence "you are" in the lines column
of the inputdata table.

2. Which two of the following are true about this trivial Pig program' (choose Two)

A) myfile is read from the user's home directory in HDFS
B) The contents of myfile appear on stdout
C) Pig assumes the contents of myfile are comma delimited
D) ABC has a schema associated with it

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

4. 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) 3
B) 1
C) 0
D) 5
E) 6

5. Which process describes the lifecycle of a Mapper?

A) The JobTracker spawns a new Mapper to process all records in a single file.
B) The TaskTracker spawns a new Mapper to process each key-value pair.
C) The JobTracker calls the TaskTracker's configure () method, then its map () method and finally its close () method.
D) The TaskTracker spawns a new Mapper to process all records in a single input split.

Solutions: