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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:

Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

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

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

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

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

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

4. Which one of the following files is required in every Oozie Workflow application?

A) Oozie.xml
B) Config-default.xml
C) job.properties
D) Workflow.xml

5. You are developing a combiner that takes as input Text keys, IntWritable values, and emits Text keys, IntWritable values. Which interface should your class implement?

A) Combiner <Text, IntWritable, Text, IntWritable>
B) Combiner <Text, Text, IntWritable, IntWritable>
C) Mapper <Text, IntWritable, Text, IntWritable>
D) Reducer <Text, Text, IntWritable, IntWritable>
E) Reducer <Text, IntWritable, Text, IntWritable>

Solutions: