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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:

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

1. Review the following 'data' file and Pig code.

Which one of the following statements is true?

A) The code executes successfully but there is not output because the D relation is empty
B) The Output Of the DUMP D command IS (M,{(M,62.95102),(M,38,95111)})
C) The code does not execute successfully because D is not a valid relation
D) The output of the dump d command is (M, {(38,95in),(62,95i02)})

2. 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) Six
C) Four
D) Two
E) Three
F) Five

3. What data does a Reducer reduce method process?

A) All data produced by a single mapper.
B) All data for a given key, regardless of which mapper(s) produced it.
C) All the data in a single input file.
D) All data for a given value, regardless of which mapper(s) produced it.

4. Which one of the following statements is FALSE regarding the communication between DataNodes and a federation of NameNodes in Hadoop 2.0?

A) DataNodes send periodic heartbeats to all the NameNodes.
B) Each DataNode registers with all the NameNodes.
C) Each DataNode receives commands from one designated master NameNode.
D) DataNodes send periodic block reports to all the NameNodes.

5. Which one of the following statements is true regarding a MapReduce job?

A) The job's Partitioner shuffles and sorts all (key.value) pairs and sends the output to all reducers
B) The reduce method is invoked once for each unique value
C) The default Hash Partitioner sends key value pairs with the same key to the same Reducer
D) The Mapper must sort its output of (key.value) pairs in descending order based on value

Solutions: