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

1. Which one of the following statements describes the relationship between the NodeManager and the ApplicationMaster?

A) The NodeManager requests resources from the ApplicationMaster
B) The ApplicationMaster starts the NodeManager outside of a Container
C) The ApplicationMaster starts the NodeManager in a Container
D) The NodeManager creates an instance of the ApplicationMaster

2. Which one of the following statements is false about HCatalog?

A) Stores HDFS data in a database for performing SQL-like ad-hoc queries
B) Exists as a subproject of Hive
C) Designed to be used by other programs such as Pig, Hive and MapReduce
D) Provides a shared schema mechanism

3. In Hadoop 2.0, which TWO of the following processes work together to provide automatic failover of the NameNode? Choose 2 answers

A) ZKFailoverController
B) ZooKeeper
C) JournalNode
D) QuorumManager

4. 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 default Hash Partitioner sends key value pairs with the same key to the same Reducer
C) The Mapper must sort its output of (key.value) pairs in descending order based on value
D) The reduce method is invoked once for each unique value

5. Determine which best describes when the reduce method is first called in a MapReduce job?

A) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed. The programmer can configure in the job what percentage of the intermediate data should arrive before the reduce method begins.
B) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed. The reduce method is called only after all intermediate data has been copied and sorted.
C) Reduce methods and map methods all start at the beginning of a job, in order to provide optimal performance for map-only or reduce-only jobs.
D) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed. The reduce method is called as soon as the intermediate key-value pairs start to arrive.

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