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Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer) Sample Questions:

1. Which Hadoop component is responsible for managing the distributed file system metadata?

A) NameNode
B) DataNode
C) Metanode
D) NameSpaceManager

2. Which one of the following Hive commands uses an HCatalog table named x?

A) SELECT x.-FROM org.apache.hcatalog.hive.HCatLoader('x');
B) SELECT * FROM org.apache.hcatalog.hive.HCatLoader('x');
C) Hive commands cannot reference an HCatalog table
D) SELECT * FROM x;

3. Which one of the following classes would a Pig command use to store data in a table defined in
HCatalog?

A) org.apache.hcatalog.pig.HCatStorer
B) org.apache.hcatalog.pig.HCatOutputFormat
C) No special class is needed for a Pig script to store data in an HCatalog table
D) Pig scripts cannot use an HCatalog table

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

5. 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 of the file through the last completed block.
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 state of the file, up to the last bit written by the command.

Solutions: