Hortonworks HADOOP-PR000007 Valid Test : Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer)

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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

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

1. Which best describes what the map method accepts and emits?

A) It accepts a single key-value pair as input and emits a single key and list of corresponding values as
output.
B) It accepts a single key-value pairs as input and can emit only one key-value pair as output.
C) It accepts a single key-value pairs as input and can emit any number of key-value pair as output,
including zero.
D) It accepts a list key-value pairs as input and can emit only one key-value pair as output.

2. You write MapReduce job to process 100 files in HDFS. Your MapReduce algorithm uses
TextInputFormat: the mapper applies a regular expression over input values and emits key-values pairs
with the key consisting of the matching text, and the value containing the filename and byte offset.
Determine the difference between setting the number of reduces to one and settings the number of
reducers to zero.

A) With zero reducers, instances of matching patterns are stored in multiple files on HDFS. With one
reducer, all instances of matching patterns are gathered together in one file on HDFS.
B) With zero reducers, no reducer runs and the job throws an exception. With one reducer, instances of
matching patterns are stored in a single file on HDFS.
C) There is no difference in output between the two settings.
D) With zero reducers, all instances of matching patterns are gathered together in one file on HDFS. With
one reducer, instances of matching patterns are stored in multiple files on HDFS.

3. 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) 6
D) 1
E) 3

4. You wrote a map function that throws a runtime exception when it encounters a control character in input
data. The input supplied to your mapper contains twelve such characters totals, spread across five file
splits. The first four file splits each have two control characters and the last split has four control
characters.
Indentify the number of failed task attempts you can expect when you run the job with
mapred.max.map.attempts set to 4:

A) You will have twelve failed task attempts
B) You will have seventeen failed task attempts
C) You will have twenty failed task attempts
D) You will have five failed task attempts
E) You will have forty-eight failed task attempts

5. 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 ApplicationMaster starts the NodeManager outside of a Container
D) The NodeManager creates an instance of the ApplicationMaster

Solutions: