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

1. Consider the following two relations, A and B.

A Pig JOIN statement that combined relations A by its first field and B by its second field would produce
what output?

A) 2 cherry 2 cherry 3 orange 4 peach
B) 2 Jim Chris 2 3 Terry 3 4 Brian 4
C) 2 cherry Jim 2 2 cherry Chris 2 3 orange Terry 3 4 peach Brian 4
D) 2 cherry Jim, Chris 3 orange Terry 4 peach Brian

2. 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) Pig scripts cannot use an HCatalog table
D) No special class is needed for a Pig script to store data in an HCatalog table

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

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

4. Examine the following Pig commands:

Which one of the following statements is true?

A) The reducers will only output the first 20% of the data passed from the mappers
B) The SAMPLE command generates an "unexpected symbol" error
C) Each MapReduce task will terminate after executing for 0.2 minutes
D) A random sample of approximately 20% of the data will be output

5. A combiner reduces:

A) The number of input files a mapper must process.
B) The amount of intermediate data that must be transferred between the mapper and reducer.
C) The number of output files a reducer must produce.
D) The number of values across different keys in the iterator supplied to a single reduce method call.

Solutions: