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

1. Review the following 'data' file and Pig code.

Which one of the following statements is true?

A) The Output Of the DUMP D command IS (M,{(M,62.95102),(M,38,95111)})
B) The output of the dump d command is (M, {(38,95in),(62,95i02)})
C) The code executes successfully but there is not output because the D relation is empty
D) The code does not execute successfully because D is not a valid relation

2. Which of the following tool was designed to import data from a relational database into HDFS?

A) Sqoop
B) Flume
C) Ambari
D) HCatalog

3. Table metadata in Hive is:

A) Stored as metadata on the NameNode.
B) Stored in the Metastore.
C) Stored in ZooKeeper.
D) Stored along with the data in HDFS.

4. When can a reduce class also serve as a combiner without affecting the output of a MapReduce program?

A) When the signature of the reduce method matches the signature of the combine method.
B) Never. Combiners and reducers must be implemented separately because they serve different purposes.
C) When the types of the reduce operation's input key and input value match the types of the reducer's output key and output value and when the reduce operation is both communicative and associative.
D) Always. The point of a combiner is to serve as a mini-reducer directly after the map phase to increase performance.
E) Always. Code can be reused in Java since it is a polymorphic object-oriented programming language.

5. Given the following Hive commands:

Which one of the following statements Is true?

A) The file mydata.txt does not move from Its current location in HDFS
B) The file mydata.txt is moved to a subfolder of /apps/hive/warehouse
C) The file mydata.txt is copied into Hive's underlying relational database 0.
D) The file mydata.txt is copied to a subfolder of /apps/hive/warehouse

Solutions: