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

1. Review the following data and Pig code:

What command to define B would produce the output (M,62,95l02) when invoking the DUMP operator on
B?

A) B= FOREACH A BY (gender = = 'M' AND zip = = '95102');
B) B = JOIN A BY (gender = = 'M' AND zip = = '95102');
C) B= GROUP A BY (zip = = '95102' AND gender = = 'M');
D) B = FILTER A BY (zip = = '95102' AND gender = = M");

2. Examine the following Pig commands:

Which one of the following statements is true?

A) The reducers will only output the first 20% of the data passed from the mappers
B) The SAMPLE command generates an "unexpected symbol" error
C) Each MapReduce task will terminate after executing for 0.2 minutes
D) A random sample of approximately 20% of the data will be output

3. Your client application submits a MapReduce job to your Hadoop cluster. Identify the Hadoop daemon on
which the Hadoop framework will look for an available slot schedule a MapReduce operation.

A) DataNode
B) TaskTracker
C) NameNode
D) JobTracker
E) Secondary NameNode

4. What are the TWO main components of the YARN ResourceManager process? Choose 2 answers

A) Task Tracker
B) Applications Manager
C) Scheduler
D) Job Tracker

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

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

Solutions: