Hortonworks Apache-Hadoop-Developer : Hadoop 2.0 Certification exam for Pig and Hive Developer

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Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

1. Which HDFS command displays the contents of the file x in the user's HDFS home directory?

A) hadoop fs -cat x
B) hadoop fs -Is x
C) hdfs fs -get x
D) hadoop fs -cp x

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

A) Both the keys and values passed to a reducer always appear in sorted order.
B) Neither keys nor values are in any predictable 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

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

4. Which one of the following Hive commands uses an HCatalog table named x?

A) SELECT * FROM x;
B) Hive commands cannot reference an HCatalog table
C) SELECT * FROM org.apache.hcatalog.hive.HCatLoader('x');
D) SELECT x.-FROM org.apache.hcatalog.hive.HCatLoader('x');

5. Which process describes the lifecycle of a Mapper?

A) The TaskTracker spawns a new Mapper to process each key-value pair.
B) The JobTracker spawns a new Mapper to process all records in a single file.
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.

Solutions: