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

1. Which one of the following is NOT a valid Oozie action?

A) mapreduce
B) mrunit
C) pig
D) hive

2. You wrote a map function that throws a runtime exception when it encounters a control character in input
data. The input supplied to your mapper contains twelve such characters totals, spread across five file
splits. The first four file splits each have two control characters and the last split has four control
characters.
Indentify the number of failed task attempts you can expect when you run the job with
mapred.max.map.attempts set to 4:

A) You will have seventeen failed task attempts
B) You will have twelve failed task attempts
C) You will have twenty failed task attempts
D) You will have five failed task attempts
E) You will have forty-eight failed task attempts

3. Examine the following Hive statements:

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

A) The file named File1 is moved to to/user/joe/x/
B) The contents of File1 are parsed as comma-delimited rows and stored in a database
C) Hive reformats File1 into a structure that Hive can access and moves into to/user/joe/x/
D) The contents of File1 are parsed as comma-delimited rows and loaded into /user/joe/x/

4. You've written a MapReduce job that will process 500 million input records and generated 500 million
key-value pairs. The data is not uniformly distributed. Your MapReduce job will create a significant
amount of intermediate data that it needs to transfer between mappers and reduces which is a potential
bottleneck. A custom implementation of which interface is most likely to reduce the amount of
intermediate data transferred across the network?

A) Partitioner
B) Combiner
C) InputFormat
D) Writable
E) OutputFormat
F) WritableComparable

5. Which HDFS command uploads a local file X into an existing HDFS directory Y?

A) hadoop scp X Y
B) hadoop fs -localPut X Y
C) hadoop fs-put X Y
D) hadoop fs -get X Y

Solutions: