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Updated: Jun 13, 2026
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Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:
1. 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 = JOIN A by al, B by b2;
C) C = JOIN A SO, B $1;
D) C = DOIN B BY a1, A by b2;
2. Consider the following two relations, A and B.
A Pig JOIN statement that combined relations A by its first field and B by its second field would produce what output?
A) 2 cherry Jim 2 2 cherry Chris 2 3 orange Terry 3 4 peach Brian 4
B) 2 Jim Chris 2 3 Terry 3 4 Brian 4
C) 2 cherry Jim, Chris 3 orange Terry 4 peach Brian
D) 2 cherry 2 cherry 3 orange 4 peach
3. Review the following 'data' file and Pig code.
Which one of the following statements is true?
A) The code executes successfully but there is not output because the D relation is empty
B) The code does not execute successfully because D is not a valid relation
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)})
4. Examine the following Hive statements:
Assuming the statements above execute successfully, which one of the following statements is true?
A) The output is guaranteed to be a single file with all the data sorted by age
B) The SORT BY command causes only one reducer to be used
C) The output of each reducer is only the age column
D) Each reducer generates a file sorted by age
5. You want to count the number of occurrences for each unique word in the supplied input data. You've decided to implement this by having your mapper tokenize each word and emit a literal value 1, and then have your reducer increment a counter for each literal 1 it
receives. After successful implementing this, it occurs to you that you could optimize this by specifying a combiner. Will you be able to reuse your existing Reduces as your combiner in this case and why or why not?
A) No, because the sum operation in the reducer is incompatible with the operation of a Combiner.
B) No, because the Combiner is incompatible with a mapper which doesn't use the same data type for both the key and value.
C) Yes, because the sum operation is both associative and commutative and the input and output types to the reduce method match.
D) Yes, because Java is a polymorphic object-oriented language and thus reducer code can be reused as a combiner.
E) No, because the Reducer and Combiner are separate interfaces.
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: C | Question # 4 Answer: D | Question # 5 Answer: C |
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