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

1. You have a directory named jobdata in HDFS that contains four files: _first.txt, second.txt, .third.txt and
# data.txt. How many files will be processed by the FileInputFormat.setInputPaths () command when it's
given a path object representing this directory?

A) Four, all files will be processed
B) Two, file names with a leading period or underscore are ignored
C) Three, the pound sign is an invalid character for HDFS file names
D) One, no special characters can prefix the name of an input file
E) None, the directory cannot be named jobdata

2. Which one of the following statements describes the relationship between the ResourceManager and the
ApplicationMaster?

A) The ResourceManager monitors and restarts any failed Containers of the ApplicationMaster
B) The ApplicationMaster starts an instance of the ResourceManager within each Container
C) The ApplicationMaster starts a single instance of the ResourceManager
D) The ApplicationMaster requests resources from the ResourceManager

3. Given the following Pig commands:

Which one of the following statements is true?

A) The $1 variable represents the first column of data in 'my.log'
B) The grouped relation is not valid
C) The $1 variable represents the second column of data in 'my.log'
D) The severe relation is not valid

4. Given a directory of files with the following structure:
line number, tab character, string:
Example:
1 abialkjfjkaoasdfjksdlkjhqweroij
2 kadfjhuwqounahagtnbvaswslmnbfgy
3 kjfteiomndscxeqalkzhtopedkfsikj
You want to send each line as one record to your Mapper. Which InputFormat should you use to complete
the line: conf.setInputFormat (____.class) ; ?

A) BDBInputFormat
B) SequenceFileAsTextInputFormat
C) KeyValueFileInputFormat
D) SequenceFileInputFormat

5. Consider the following two relations, A and B.

Which Pig statement combines A by its first field and B by its second field?

A) C = JOIN A SO, B $1;
B) C = JOIN A by al, B by b2;
C) C = JOIN A a1, B b2;
D) C = DOIN B BY a1, A by b2;

Solutions: