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

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

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

3. On a cluster running MapReduce v1 (MRv1), a TaskTracker heartbeats into the JobTracker on your
cluster, and alerts the JobTracker it has an open map task slot.
What determines how the JobTracker assigns each map task to a TaskTracker?

A) The average system load on the TaskTracker node over the past fifteen (15) minutes.
B) The location of the InsputSplit to be processed in relation to the location of the node.
C) The amount of free disk space on the TaskTracker node.
D) The amount of RAM installed on the TaskTracker node.
E) The number and speed of CPU cores on the TaskTracker node.

4. Which project gives you a distributed, Scalable, data store that allows you random, realtime read/write
access to hundreds of terabytes of data?

A) Hive
B) HBase
C) Hue
D) Sqoop
E) Flume
F) Pig
G) Oozie

5. Which one of the following statements is true about a Hive-managed table?

A) Hive dynamically defines the schema of the table based on the FROM clause of a SELECT query.
B) Records can only be added to the table using the Hive INSERT command.
C) When the table is dropped, the underlying folder in HDFS is deleted.
D) Hive dynamically defines the schema of the table based on the format of the underlying data.

Solutions: