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Hortonworks Hadoop 2.0 Certification exam for 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 code executes successfully but there is not output because the D relation is empty
B) The output of the dump d command is (M, {(38,95in),(62,95i02)})
C) The code does not execute successfully because D is not a valid relation
D) The Output Of the DUMP D command IS (M,{(M,62.95102),(M,38,95111)})

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

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

3. You want to count the number of occurrences for each unique word in the supplied input data. You've decided to implement this by having your mapper tokenize each word and emit a literal value 1, and then have your reducer increment a counter for each literal 1 it
receives. After successful implementing this, it occurs to you that you could optimize this by specifying a combiner. Will you be able to reuse your existing Reduces as your combiner in this case and why or why not?

A) No, because the Reducer and Combiner are separate interfaces.
B) Yes, because Java is a polymorphic object-oriented language and thus reducer code can be reused as a combiner.
C) No, because the Combiner is incompatible with a mapper which doesn't use the same data type for both the key and value.
D) Yes, because the sum operation is both associative and commutative and the input and output types to the reduce method match.
E) No, because the sum operation in the reducer is incompatible with the operation of a Combiner.

4. Which one of the following statements regarding the components of YARN is FALSE?

A) The ResourceManager monitors and restarts any failed Containers
B) The ResourceManager is responsible for scheduling and allocating resources
C) A client application submits a YARW job to the ResourceManager
D) A Container executes a specific task as assigned by the ApplicationMaster

5. What are the TWO main components of the YARN ResourceManager process? Choose 2 answers

A) Job Tracker
B) Scheduler
C) Applications Manager
D) Task Tracker

Solutions: