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

1. Identify the MapReduce v2 (MRv2 / YARN) daemon responsible for launching application containers and monitoring application resource usage?

A) TaskTracker
B) JobTracker
C) NodeManager
D) ApplicationMaster
E) ResourceManager
F) ApplicationMasterService

2. 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 frequency distribution of the top 80 words that follow the subsequence "you are" in the lines column of the inputdata table.
D) A bigram of the top 80 sentences that contain the substring "you are" in the lines column of the input data A1 table.

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

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

4. For each intermediate key, each reducer task can emit:

A) As many final key-value pairs as desired, but they must have the same type as the intermediate key-value pairs.
B) As many final key-value pairs as desired. There are no restrictions on the types of those key-value pairs (i.e., they can be heterogeneous).
C) One final key-value pair per value associated with the key; no restrictions on the type.
D) As many final key-value pairs as desired, as long as all the keys have the same type and all the values have the same type.
E) One final key-value pair per key; no restrictions on the type.

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

Solutions: