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

1. Given the following Hive command:
INSERT OVERWRITE TABLE mytable SELECT * FROM myothertable;
Which one of the following statements is true?

A) Any existing data in mytable will be overwritten
B) The statement is not a valid Hive command
C) A new table named mytable is created, and the contents of myothertable are copied into mytable
D) The contents of myothertable are appended to mytable

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

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

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

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

4. 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 loaded into /user/joe/x/
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 stored in a database

5. How are keys and values presented and passed to the reducers during a standard sort and shuffle phase of MapReduce?

A) Keys are presented to a reducer in random order; values for a given key are sorted in ascending order.
B) Keys are presented to reducer in sorted order; values for a given key are sorted in ascending order.
C) Keys are presented to reducer in sorted order; values for a given key are not sorted.
D) Keys are presented to a reducer in random order; values for a given key are not sorted.

Solutions: