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

1. 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 B
C) Option C
D) Option A

2. To use a lava user-defined function (UDF) with Pig what must you do?

A) Put the JAR file into the user's home folder in HDFS
B) Pass arguments to the constructor of UDFs implementation class
C) Register the JAR file containing the UDF
D) Define an alias to shorten the function name

3. All keys used for intermediate output from mappers must:

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

4. What types of algorithms are difficult to express in MapReduce v1 (MRv1)?

A) Relational operations on large amounts of structured and semi-structured data.
B) Algorithms that require applying the same mathematical function to large numbers of individual binary
records.
C) Text analysis algorithms on large collections of unstructured text (e.g, Web crawls).
D) Algorithms that require global, sharing states.
E) Large-scale graph algorithms that require one-step link traversal.

5. 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) DataNodes send periodic block reports to all the NameNodes.
C) Each DataNode registers with all the NameNodes.
D) DataNodes send periodic heartbeats to all the NameNodes.

Solutions: