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

1. What is the disadvantage of using multiple reducers with the default HashPartitioner and distributing your workload across you cluster?

A) By using multiple reducers with the default HashPartitioner, output files may not be in globally sorted order.
B) You will not be able to compress the intermediate data.
C) You will longer be able to take advantage of a Combiner.
D) There are no concerns with this approach. It is always advisable to use multiple reduces.

2. Which Hadoop component is responsible for managing the distributed file system metadata?

A) NameSpaceManager
B) DataNode
C) Metanode
D) NameNode

3. Indentify which method in the Mapper you should use to implement code for reading the file and populating the associative array?

A) init
B) combine
C) configure
D) map

4. Which one of the following Hive commands uses an HCatalog table named x?

A) SELECT * FROM org.apache.hcatalog.hive.HCatLoader('x');
B) SELECT x.-FROM org.apache.hcatalog.hive.HCatLoader('x');
C) Hive commands cannot reference an HCatalog table
D) SELECT * FROM x;

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

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

Solutions: