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

1. All keys used for intermediate output from mappers must:

A) Implement a splittable compression algorithm.
B) Override isSplitable.
C) Be a subclass of FileInputFormat.
D) Implement a comparator for speedy sorting.
E) Implement WritableComparable.

2. In a MapReduce job with 500 map tasks, how many map task attempts will there be?

A) Exactly 500.
B) Between 500 and 1000.
C) At least 500.
D) At most 500.
E) It depends on the number of reduces in the job.

3. You have the following key-value pairs as output from your Map task:
(the, 1) (fox, 1) (faster, 1) (than, 1) (the, 1) (dog, 1)
How many keys will be passed to the Reducer's reduce method?

A) Five
B) One
C) Four
D) Two
E) Three
F) Six

4. Given the following Hive command:

Which one of the following statements is true?

A) The files in the mydata folder are copied into Hive's underlying relational database
B) The files in the mydata folder are moved to a subfolder of /apps/hive/wa re house
C) The files in the mydata folder are copied to a subfolder of /apps/hlve/warehouse
D) The files in the mydata folder do not move from their current location In HDFS

5. 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

Solutions: