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

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

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

2. 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 mapper-specification.xml file submitted with the job determine the mapper's input key and value
types.
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 key and value types specified in the JobConf.setMapInputKeyClass and
JobConf.setMapInputValuesClass methods

3. All keys used for intermediate output from mappers must:

A) Implement a comparator for speedy sorting.
B) Override isSplitable.
C) Be a subclass of FileInputFormat.
D) Implement a splittable compression algorithm.
E) Implement WritableComparable.

4. You need to run the same job many times with minor variations. Rather than hardcoding all job
configuration options in your drive code, you've decided to have your Driver subclass
org.apache.hadoop.conf.Configured and implement the org.apache.hadoop.util.Tool interface.
Indentify which invocation correctly passes.mapred.job.name with a value of Example to Hadoop?

A) hadoop MyDriver mapred.job.name=Example input output
B) hadoop MyDrive -D mapred.job.name=Example input output
C) hadoop "mapred.job.name=Example" MyDriver input output
D) hadoop setproperty mapred.job.name=Example MyDriver input output
E) hadoop setproperty ("mapred.job.name=Example") MyDriver input output

5. You want to populate an associative array in order to perform a map-side join. You've decided to put this
information in a text file, place that file into the DistributedCache and read it in your Mapper before any
records are processed. Indentify which method in the Mapper you should use to implement code for
reading the file and populating the associative array?

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

Solutions: