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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

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

Question 1

A combiner reduces:

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

Question 2

To process input key-value pairs, your mapper needs to lead a 512 MB data file in memory. What is the
best way to accomplish this?

A. Place the data file in the DistributedCache and read the data into memory in the configure method of
the mapper.
B. Place the data file in the DataCache and read the data into memory in the configure method of the
mapper.
C. Serialize the data file, insert in it the JobConf object, and read the data into memory in the configure
method of the mapper.
D. Place the data file in the DistributedCache and read the data into memory in the map method of the
mapper.

Question 3

Which one of the following statements describes the relationship between the ResourceManager and the
ApplicationMaster?

A. The ApplicationMaster starts a single instance of the ResourceManager
B. The ApplicationMaster starts an instance of the ResourceManager within each Container
C. The ResourceManager monitors and restarts any failed Containers of the ApplicationMaster
D. The ApplicationMaster requests resources from the ResourceManager

Question 4

What is the term for the process of moving map outputs to the reducers?

A. Partitioning
B. Combining
C. Shuffling and sorting
D. Reducing

Question 5

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

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

Solutions: