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Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

1. 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) TaskTracker
B) DataNode
C) Secondary NameNode
D) JobTracker
E) NameNode

2. To process input key-value pairs, your mapper needs to lead a 512 MB data file in memory. What is the best way to accomplish this?

A) Serialize the data file, insert in it the JobConf object, and read the data into memory in the configure method of the mapper.
B) Place the data file in the DistributedCache and read the data into memory in the map method of the mapper.
C) Place the data file in the DistributedCache and read the data into memory in the configure method of the mapper.
D) Place the data file in the DataCache and read the data into memory in the configure method of the mapper.

3. Which HDFS command displays the contents of the file x in the user's HDFS home directory?

A) hadoop fs -Is x
B) hdfs fs -get x
C) hadoop fs -cp x
D) hadoop fs -cat x

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

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

5. 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) 1
B) 0
C) 5
D) 6
E) 3

Solutions: