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

2. You have written a Mapper which invokes the following five calls to the OutputColletor.collect method:
output.collect (new Text ("Apple"), new Text ("Red") ) ;
output.collect (new Text ("Banana"), new Text ("Yellow") ) ;
output.collect (new Text ("Apple"), new Text ("Yellow") ) ;
output.collect (new Text ("Cherry"), new Text ("Red") ) ;
output.collect (new Text ("Apple"), new Text ("Green") ) ;
How many times will the Reducer's reduce method be invoked?

A) 6
B) 5
C) 0
D) 3
E) 1

3. In a MapReduce job with 500 map tasks, how many map task attempts will there be?

A) Between 500 and 1000.
B) At most 500.
C) It depends on the number of reduces in the job.
D) At least 500.
E) Exactly 500.

4. Given the following Hive command:

Which one of the following statements is true?

A) The files in the mydata folder are copied to a subfolder of /apps/hlve/warehouse
B) The files in the mydata folder do not move from their current location In HDFS
C) The files in the mydata folder are moved to a subfolder of /apps/hive/wa re house
D) The files in the mydata folder are copied into Hive's underlying relational database

5. For each input key-value pair, mappers can emit:

A) As many intermediate key-value pairs as designed, as long as all the keys have the same types and all
the values have the same type.
B) One intermediate key-value pair, but of the same type.
C) As many intermediate key-value pairs as designed, but they cannot be of the same type as the input
key-value pair.
D) As many intermediate key-value pairs as designed. There are no restrictions on the types of those
key-value pairs (i.e., they can be heterogeneous).
E) One intermediate key-value pair, of a different type.

Solutions: