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

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

2. Which TWO of the following statements are true regarding Hive? Choose 2 answers

A) Is a relational database
B) Offers real-time queries and row level updates
C) Allows you to define a structure for your unstructured Big Data
D) Useful for data analysts familiar with SQL who need to do ad-hoc queries

3. In a MapReduce job, the reducer receives all values associated with same key. Which statement best describes the ordering of these values?

A) The values are arbitrarily ordered, and the ordering may vary from run to run of the same MapReduce job.
B) The values are in sorted order.
C) The values are arbitrary ordered, but multiple runs of the same MapReduce job will always have the same ordering.
D) Since the values come from mapper outputs, the reducers will receive contiguous sections of sorted values.

4. You have the following key-value pairs as output from your Map task:
(the, 1) (fox, 1) (faster, 1) (than, 1) (the, 1) (dog, 1)
How many keys will be passed to the Reducer's reduce method?

A) One
B) Four
C) Two
D) Six
E) Three
F) Five

5. Examine the following Pig commands:

Which one of the following statements is true?

A) Each MapReduce task will terminate after executing for 0.2 minutes
B) The SAMPLE command generates an "unexpected symbol" error
C) The reducers will only output the first 20% of the data passed from the mappers
D) A random sample of approximately 20% of the data will be output

Solutions: