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

1. Identify the tool best suited to import a portion of a relational database every day as files into HDFS, and generate Java classes to interact with that imported data?

A) Sqoop
B) Pig
C) Flume
D) Hue
E) fuse-dfs
F) Hive
G) Oozie

2. For each input key-value pair, mappers can emit:

A) One intermediate key-value pair, but of the same type.
B) As many intermediate key-value pairs as designed, but they cannot be of the same type as the input key-value pair.
C) One intermediate key-value pair, of a different type.
D) As many intermediate key-value pairs as designed, as long as all the keys have the same types and all the values have the same type.
E) As many intermediate key-value pairs as designed. There are no restrictions on the types of those key-value pairs (i.e., they can be heterogeneous).

3. You use the hadoop fs -put command to write a 300 MB file using and HDFS block size of 64 MB. Just after this command has finished writing 200 MB of this file, what would another user see when trying to access this life?

A) They would see Hadoop throw an ConcurrentFileAccessException when they try to access this file.
B) They would see the current of the file through the last completed block.
C) They would see the current state of the file, up to the last bit written by the command.
D) They would see no content until the whole file written and closed.

4. Review the following data and Pig code.
M,38,95111 F,29,95060 F,45,95192 M,62,95102 F,56,95102
A = LOAD 'data' USING PigStorage('.') as (gender:Chararray, age:int, zlp:chararray);
B = FOREACH A GENERATE age;
Which one of the following commands would save the results of B to a folder in hdfs named myoutput?

A) DUMP B using PigStorage('myoutput');
B) DUMP B INTO 'myoutput';
C) STORE A INTO 'myoutput' USING PigStorage(',');
D) STORE B INTO 'myoutput';

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

A) The statement is not a valid Hive command
B) Any existing data in mytable will be overwritten
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

Solutions: