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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer) Sample Questions:

Question 1

When is the earliest point at which the reduce method of a given Reducer can be called?

A. As soon as at least one mapper has finished processing its input split.
B. As soon as a mapper has emitted at least one record.
C. Not until all mappers have finished processing all records.
D. It depends on the InputFormat used for the job.

Question 2

Which one of the following statements describes a Pig bag. tuple, and map, respectively?

A. Ordered set of fields, ordered collection of tuples, ordered collection of maps
B. Unordered collection of tuples, ordered set of fields, set of key value pairs
C. Unordered collection of maps, ordered collection of tuples, ordered set of key/value pairs
D. Ordered collection of maps, ordered collection of bags, and unordered set of key/value pairs

Question 3

All keys used for intermediate output from mappers must:

A. Implement WritableComparable.
B. Override isSplitable.
C. Implement a splittable compression algorithm.
D. Be a subclass of FileInputFormat.
E. Implement a comparator for speedy sorting.

Question 4

Consider the following two relations, A and B.

What is the output of the following Pig commands?
X = GROUP A BY S1; DUMP X;

A. Option D
B. Option C
C. Option A
D. Option B

Question 5

Which describes how a client reads a file from HDFS?

A. The client contacts the NameNode for the block location(s). The NameNode then queries the
DataNodes for block locations. The DataNodes respond to the NameNode, and the NameNode redirects
the client to the DataNode that holds the requested data block(s). The client then reads the data directly
off the DataNode.
B. The client contacts the NameNode for the block location(s). The NameNode contacts the DataNode
that holds the requested data block. Data is transferred from the DataNode to the NameNode, and then
from the NameNode to the client.
C. The client queries all DataNodes in parallel. The DataNode that contains the requested data responds
directly to the client. The client reads the data directly off the DataNode.
D. The client queries the NameNode for the block location(s). The NameNode returns the block location(s)
to the client. The client reads the data directory off the DataNode(s).

Solutions: