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

1. You have a directory named jobdata in HDFS that contains four files: _first.txt, second.txt, .third.txt and #data.txt. How many files will be processed by the FileInputFormat.setInputPaths () command when it's given a path object representing this directory?

A) Two, file names with a leading period or underscore are ignored
B) Four, all files will be processed
C) Three, the pound sign is an invalid character for HDFS file names
D) One, no special characters can prefix the name of an input file
E) None, the directory cannot be named jobdata

2. Identify the MapReduce v2 (MRv2 / YARN) daemon responsible for launching application containers and monitoring application resource usage?

A) JobTracker
B) ApplicationMaster
C) TaskTracker
D) ResourceManager
E) NodeManager
F) ApplicationMasterService

3. You need to move a file titled "weblogs" into HDFS. When you try to copy the file, you can't. You know you have ample space on your DataNodes. Which action should you take to relieve this situation and store more files in HDFS?

A) Increase the number of disks (or size) for the NameNode.
B) Increase the block size on your remaining files.
C) Decrease the block size on your remaining files.
D) Increase the block size on all current files in HDFS.
E) Increase the amount of memory for the NameNode.
F) Decrease the block size on all current files in HDFS.

4. Examine the following Hive statements:

Assuming the statements above execute successfully, which one of the following statements is true?

A) The output of each reducer is only the age column
B) The SORT BY command causes only one reducer to be used
C) Each reducer generates a file sorted by age
D) The output is guaranteed to be a single file with all the data sorted by age

5. Which Two of the following statements are true about hdfs? Choose 2 answers

A) Blocks are replicated to multiple datanodes
B) HDFS works best when storing a large number of relatively small files
C) Block sizes for all files must be the same size
D) An HDFS file that is larger than dfs.block.size is split into blocks

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