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

1. Examine the following Hive statements:

Assuming the statements above execute successfully, which one of the following statements is true?

A) Each reducer generates a file sorted by age
B) The output is guaranteed to be a single file with all the data sorted by age
C) The output of each reducer is only the age column
D) The SORT BY command causes only one reducer to be used

2. In a large MapReduce job with m mappers and n reducers, how many distinct copy operations will there
be in the sort/shuffle phase?

A) mXn (i.e., m multiplied by n)
B) m
C) m+n (i.e., m plus n)
D) n
E) mn (i.e., m to the power of n)

3. Which two of the following statements are true about Pig's approach toward data? Choose 2 answers

A) Accepts any data: structured or unstructured
B) Accepts only data that has a key/value pair structure
C) Accepts tab-delimited text data only
D) Accepts data whether it has metadata or not
E) Accepts only data that is defined by metadata tables stored in a database

4. You are developing a MapReduce job for sales reporting. The mapper will process input keys
representing the year (IntWritable) and input values representing product indentifies (Text).
Indentify what determines the data types used by the Mapper for a given job.

A) The mapper-specification.xml file submitted with the job determine the mapper's input key and value
types.
B) The key and value types specified in the JobConf.setMapInputKeyClass and
JobConf.setMapInputValuesClass methods
C) The InputFormat used by the job determines the mapper's input key and value types.
D) The data types specified in HADOOP_MAP_DATATYPES environment variable

5. Consider the following two relations, A and B.

A Pig JOIN statement that combined relations A by its first field and B by its second field would produce
what output?

A) 2 cherry Jim 2 2 cherry Chris 2 3 orange Terry 3 4 peach Brian 4
B) 2 Jim Chris 2 3 Terry 3 4 Brian 4
C) 2 cherry 2 cherry 3 orange 4 peach
D) 2 cherry Jim, Chris 3 orange Terry 4 peach Brian

Solutions: