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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

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

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

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

2. What data does a Reducer reduce method process? Reference: Yahoo! Hadoop Tutorial, Module 4:
MapReduce

A) All data produced by a single mapper.
B) All data for a given key, regardless of which mapper(s) produced it.
C) All data for a given value, regardless of which mapper(s) produced it.
D) All the data in a single input file.

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

4. Which two of the following are true about this trivial Pig program' (choose Two)

A) ABC has a schema associated with it
B) The contents of myfile appear on stdout
C) Pig assumes the contents of myfile are comma delimited
D) myfile is read from the user's home directory in HDFS

5. Workflows expressed in Oozie can contain:

A) Sequences of MapReduce and Pig. These sequences can be combined with other actions including
forks, decision points, and path joins.
B) Sequences of MapReduce and Pig jobs. These are limited to linear sequences of actions with
exception handlers but no forks.
C) Iterntive repetition of MapReduce jobs until a desired answer or state is reached.
D) Sequences of MapReduce job only; on Pig on Hive tasks or jobs. These MapReduce sequences can
be combined with forks and path joins.

Solutions: