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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

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

1. Determine which best describes when the reduce method is first called in a MapReduce job?

A) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed.
The reduce method is called only after all intermediate data has been copied and sorted.
B) Reduce methods and map methods all start at the beginning of a job, in order to provide optimal
performance for map-only or reduce-only jobs.
C) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed.
The reduce method is called as soon as the intermediate key-value pairs start to arrive.
D) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed.
The programmer can configure in the job what percentage of the intermediate data should arrive before
the reduce method begins.

2. 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.

3. Which one of the following statements describes the relationship between the ResourceManager and the
ApplicationMaster?

A) The ResourceManager monitors and restarts any failed Containers of the ApplicationMaster
B) The ApplicationMaster requests resources from the ResourceManager
C) The ApplicationMaster starts a single instance of the ResourceManager
D) The ApplicationMaster starts an instance of the ResourceManager within each Container

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

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

5. Which two of the following statements are true about Pig's approach toward data? Choose 2 answers

A) Accepts any data: structured or unstructured
B) Accepts tab-delimited text data only
C) Accepts data whether it has metadata or not
D) Accepts only data that is defined by metadata tables stored in a database
E) Accepts only data that has a key/value pair structure

Solutions: