Hortonworks Apache-Hadoop-Developer Exam : Hadoop 2.0 Certification exam for Pig and Hive Developer

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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:

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

1. Indentify which best defines a SequenceFile?

A) A SequenceFile contains a binary encoding of an arbitrary number of homogeneous Writable objects
B) A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable objects, in sorted order.
C) A SequenceFile contains a binary encoding of an arbitrary number key-value pairs. Each key must be the same type. Each value must be the same type.
D) A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous Writable objects

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

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

3. You use the hadoop fs -put command to write a 300 MB file using and HDFS block size of 64 MB. Just after this command has finished writing 200 MB of this file, what would another user see when trying to access this life?

A) They would see the current state of the file, up to the last bit written by the command.
B) They would see no content until the whole file written and closed.
C) They would see Hadoop throw an ConcurrentFileAccessException when they try to access this file.
D) They would see the current of the file through the last completed block.

4. Determine which best describes when the reduce method is first called in a MapReduce job?

A) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed. The reduce method is called as soon as the intermediate key-value pairs start to arrive.
B) Reduce methods and map methods all start at the beginning of a job, in order to provide optimal performance for map-only or reduce-only jobs.
C) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed. The reduce method is called only after all intermediate data has been copied and sorted.
D) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed. The programmer can configure in the job what percentage of the intermediate data should arrive before the reduce method begins.

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 the DataNode, TaskTracker, NameNode and JobTracker daemons on a single machine.
C) Run simldooop, the Apache open-source software for simulating Hadoop clusters.
D) Run all the nodes in your production cluster as virtual machines on your development workstation.

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