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

1. Which TWO of the following statements are true regarding Hive? Choose 2 answers

A) Allows you to define a structure for your unstructured Big Data
B) Offers real-time queries and row level updates
C) Useful for data analysts familiar with SQL who need to do ad-hoc queries
D) Is a relational database

2. Assuming default settings, which best describes the order of data provided to a reducer's reduce method:

A) Neither keys nor values are in any predictable order.
B) The keys given to a reducer are in sorted order but the values associated with each key are in no
predictable order
C) The keys given to a reducer aren't in a predictable order, but the values associated with those keys
always are.
D) Both the keys and values passed to a reducer always appear in sorted order.

3. You want to populate an associative array in order to perform a map-side join. You've decided to put this
information in a text file, place that file into the DistributedCache and read it in your Mapper before any
records are processed. Indentify which method in the Mapper you should use to implement code for
reading the file and populating the associative array?

A) map
B) configure
C) combine
D) init

4. Review the following data and Pig code.
M,38,95111 F,29,95060 F,45,95192 M,62,95102 F,56,95102
A = LOAD 'data' USING PigStorage('.') as (gender:Chararray, age:int,
zlp:chararray);
B = FOREACH A GENERATE age;
Which one of the following commands would save the results of B to a folder in hdfs named myoutput?

A) DUMP B using PigStorage('myoutput');
B) DUMP B INTO 'myoutput';
C) STORE A INTO 'myoutput' USING PigStorage(',');
D) STORE B INTO 'myoutput';

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

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

Solutions: