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Hortonworks-Certified-Apache-Hadoop-2.0-Developer(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) An 80-value ngram of sentences that contain the words "you" or "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) A frequency distribution of the top 80 words that follow the subsequence "you are" in the lines column
of the inputdata table.

2. Assuming default settings, which best describes the order of data provided to a reducer's reduce method:

A) Neither keys nor values are in any predictable order.
B) Both the keys and values passed to a reducer always appear in sorted order.
C) The keys given to a reducer aren't in a predictable order, but the values associated with those keys
always are.
D) The keys given to a reducer are in sorted order but the values associated with each key are in no
predictable order

3. Review the following data and Pig code:

What command to define B would produce the output (M,62,95l02) when invoking the DUMP operator on
B?

A) B = JOIN A BY (gender = = 'M' AND zip = = '95102');
B) B= GROUP A BY (zip = = '95102' AND gender = = 'M');
C) B= FOREACH A BY (gender = = 'M' AND zip = = '95102');
D) B = FILTER A BY (zip = = '95102' AND gender = = M");

4. Which TWO of the following statements are true regarding Hive? Choose 2 answers

A) Is a relational database
B) Allows you to define a structure for your unstructured Big Data
C) Offers real-time queries and row level updates
D) Useful for data analysts familiar with SQL who need to do ad-hoc queries

5. You are developing a MapReduce job for sales reporting. The mapper will process input keys
representing the year (IntWritable) and input values representing product indentifies (Text).
Indentify what determines the data types used by the Mapper for a given job.

A) The InputFormat used by the job determines the mapper's input key and value types.
B) The key and value types specified in the JobConf.setMapInputKeyClass and
JobConf.setMapInputValuesClass methods
C) The mapper-specification.xml file submitted with the job determine the mapper's input key and value
types.
D) The data types specified in HADOOP_MAP_DATATYPES environment variable

Solutions: