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

1. Given a directory of files with the following structure: line number, tab character, string:
Example:
1abialkjfjkaoasdfjksdlkjhqweroij
2kadfjhuwqounahagtnbvaswslmnbfgy
3kjfteiomndscxeqalkzhtopedkfsikj
You want to send each line as one record to your Mapper. Which InputFormat should you use to complete the line: conf.setInputFormat (____.class) ; ?

A) SequenceFileAsTextInputFormat
B) SequenceFileInputFormat
C) KeyValueFileInputFormat
D) BDBInputFormat

2. A NameNode in Hadoop 2.0 manages ______________.

A) Two namespaces: an active namespace and a backup namespace
B) A single namespace
C) No namespaces
D) An arbitrary number of namespaces

3. For each input key-value pair, mappers can emit:

A) One intermediate key-value pair, of a different type.
B) As many intermediate key-value pairs as designed, but they cannot be of the same type as the input key-value pair.
C) One intermediate key-value pair, but of the same type.
D) As many intermediate key-value pairs as designed, as long as all the keys have the same types and all the values have the same type.
E) As many intermediate key-value pairs as designed. There are no restrictions on the types of those key-value pairs (i.e., they can be heterogeneous).

4. Which YARN component is responsible for monitoring the success or failure of a Container?

A) NodeManager
B) ResourceManager
C) ApplicationMaster
D) JobTracker

5. You want to run Hadoop jobs on your development workstation for testing before you submit them to your production cluster. Which mode of operation in Hadoop allows you to most closely simulate a production cluster while using a single machine?

A) Run the hadoop command with the -jt local and the -fs file:///options.
B) Run simldooop, the Apache open-source software for simulating Hadoop clusters.
C) Run the DataNode, TaskTracker, NameNode and JobTracker daemons on a single machine.
D) Run all the nodes in your production cluster as virtual machines on your development workstation.

Solutions: