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

1. Assuming the following Hive query executes successfully:

Which one of the following statements describes the result set?

A) A frequency distribution of the top 80 words that follow the subsequence "you are" in the lines column of the inputdata table.
B) A trigram of the top 80 sentences that contain "you are" followed by a null space in the lines column of the inputdata table.
C) A bigram of the top 80 sentences that contain the substring "you are" in the lines column of the input data A1 table.
D) An 80-value ngram of sentences that contain the words "you" or "are" in the lines column of the inputdata table.

2. Review the following 'data' file and Pig code.

Which one of the following statements is true?

A) The code does not execute successfully because D is not a valid relation
B) The code executes successfully but there is not output because the D relation is empty
C) The Output Of the DUMP D command IS (M,{(M,62.95102),(M,38,95111)})
D) The output of the dump d command is (M, {(38,95in),(62,95i02)})

3. Which one of the following statements is FALSE regarding the communication between DataNodes and a federation of NameNodes in Hadoop 2.0?

A) Each DataNode receives commands from one designated master NameNode.
B) Each DataNode registers with all the NameNodes.
C) DataNodes send periodic heartbeats to all the NameNodes.
D) DataNodes send periodic block reports to all the NameNodes.

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

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

5. Given the following Hive command:

Which one of the following statements is true?

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

Solutions: