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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

Hortonworks-Certified-Apache-Hadoop-2.0-Developer(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) A new table named mytable is created, and the contents of myothertable are copied into mytable
B) The contents of myothertable are appended to mytable
C) Any existing data in mytable will be overwritten
D) The statement is not a valid Hive command

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

What is the output of the following Pig commands?
X = GROUP A BY S1; DUMP X;

A) Option B
B) Option A
C) Option D
D) Option C

3. 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) KeyValueFileInputFormat
B) SequenceFileInputFormat
C) BDBInputFormat
D) SequenceFileAsTextInputFormat

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

5. You want to run Hadoop jobs on your development workstation for testing before you submit them to your
production cluster. Which mode of operation in Hadoop allows you to most closely simulate a production
cluster while using a single machine?

A) Run the hadoop command with the -jt local and the -fs file:///options.
B) Run all the nodes in your production cluster as virtual machines on your development workstation.
C) Run simldooop, the Apache open-source software for simulating Hadoop clusters.
D) Run the DataNode, TaskTracker, NameNode and JobTracker daemons on a single machine.

Solutions: