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

1. Which one of the following classes would a Pig command use to store data in a table defined in
HCatalog?

A) No special class is needed for a Pig script to store data in an HCatalog table
B) org.apache.hcatalog.pig.HCatStorer
C) org.apache.hcatalog.pig.HCatOutputFormat
D) Pig scripts cannot use an HCatalog table

2. A combiner reduces:

A) The number of output files a reducer must produce.
B) The number of values across different keys in the iterator supplied to a single reduce method call.
C) The amount of intermediate data that must be transferred between the mapper and reducer.
D) The number of input files a mapper must process.

3. On a cluster running MapReduce v1 (MRv1), a TaskTracker heartbeats into the JobTracker on your
cluster, and alerts the JobTracker it has an open map task slot.
What determines how the JobTracker assigns each map task to a TaskTracker?

A) The average system load on the TaskTracker node over the past fifteen (15) minutes.
B) The amount of RAM installed on the TaskTracker node.
C) The location of the InsputSplit to be processed in relation to the location of the node.
D) The number and speed of CPU cores on the TaskTracker node.
E) The amount of free disk space on the TaskTracker node.

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

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

5. Which one of the following statements describes a Pig bag. tuple, and map, respectively?

A) Unordered collection of maps, ordered collection of tuples, ordered set of key/value pairs
B) Unordered collection of tuples, ordered set of fields, set of key value pairs
C) Ordered set of fields, ordered collection of tuples, ordered collection of maps
D) Ordered collection of maps, ordered collection of bags, and unordered set of key/value pairs

Solutions: