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

1. Given the following Pig command:
logevents = LOAD 'input/my.log' AS (date:chararray, levehstring, code:int, message:string);
Which one of the following statements is true?

A) The statement is not a valid Pig command
B) The logevents relation represents the data from the my.log file, using a comma as the parsing delimiter
C) The logevents relation represents the data from the my.log file, using a tab as the parsing delimiter
D) The first field of logevents must be a properly-formatted date string or table return an error

2. Which process describes the lifecycle of a Mapper?

A) The JobTracker spawns a new Mapper to process all records in a single file.
B) The TaskTracker spawns a new Mapper to process each key-value pair.
C) The JobTracker calls the TaskTracker's configure () method, then its map () method and finally its close () method.
D) The TaskTracker spawns a new Mapper to process all records in a single input split.

3. What does the following command do? register '/piggyban):/pig-files.jar';

A) Specifies the location of the JAR file containing the user-defined functions
B) Invokes the user-defined functions contained in the jar file
C) Assigns a name to a user-defined function or streaming command
D) Transforms Pig user-defined functions into a format that Hive can accept

4. Assuming default settings, which best describes the order of data provided to a reducer's reduce method:

A) Neither keys nor values are in any predictable order.
B) Both the keys and values passed to a reducer always appear in sorted order.
C) The keys given to a reducer aren't in a predictable order, but the values associated with those keys
always are.
D) The keys given to a reducer are in sorted order but the values associated with each key are in no
predictable order

5. You want to perform analysis on a large collection of images. You want to store this data in HDFS and
process it with MapReduce but you also want to give your data analysts and data scientists the ability to
process the data directly from HDFS with an interpreted high-level programming language like Python.
Which format should you use to store this data in HDFS?

A) CSV
B) JSON
C) SequenceFiles
D) Avro
E) XML
F) HTML

Solutions: