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

1. You are developing a MapReduce job for sales reporting. The mapper will process input keys
representing the year (IntWritable) and input values representing product indentifies (Text).
Indentify what determines the data types used by the Mapper for a given job.

A) The key and value types specified in the JobConf.setMapInputKeyClass and
JobConf.setMapInputValuesClass methods
B) The InputFormat used by the job determines the mapper's input key and value types.
C) The data types specified in HADOOP_MAP_DATATYPES environment variable
D) The mapper-specification.xml file submitted with the job determine the mapper's input key and value
types.

2. MapReduce v2 (MRv2/YARN) splits which major functions of the JobTracker into separate daemons?
Select two.

A) Resource management
B) Managing tasks
C) Job coordination between the ResourceManager and NodeManager
D) Heath states checks (heartbeats)
E) Job scheduling/monitoring
F) MapReduce metric reporting
G) Managing file system metadata
H) Launching tasks

3. Which one of the following statements describes a Hive user-defined aggregate function?

A) Operates on multiple input rows and produces a table as output
B) Operates on a single input row and produces a table as output
C) Operates on a single input row and produces a single row as output
D) Operates on multiple input rows and creates a single row as output

4. 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 in a Container
C) The NodeManager creates an instance of the ApplicationMaster
D) The ApplicationMaster starts the NodeManager outside of a Container

5. Given the following Pig commands:

Which one of the following statements is true?

A) The severe relation is not valid
B) The grouped relation is not valid
C) The $1 variable represents the second column of data in 'my.log'
D) The $1 variable represents the first column of data in 'my.log'

Solutions: