Hortonworks Data Platform Certified Developer

QUESTION NO: 1
All keys used for intermediate output from mappers must:

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

Correct Answer: D

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QUESTION NO: 2
Which HDFS command uploads a local file X into an existing HDFS directory Y?

A. hadoop fs -localPut X Y B. hadoop fs-put X Y C. hadoop scp X Y D. hadoop fs -get X Y

Correct Answer: B

QUESTION NO: 3
You want to run Hadoop jobs on your development workstation for testing before you submit them to your production cluster. Which mode of operation in Hadoop allows you to most closely simulate a production cluster while using a single machine?

A. Run all the nodes in your production cluster as virtual machines on your development workstation. B. Run the DataNode, TaskTracker, NameNode and JobTracker daemons on a single machine. C. Run simldooop, the Apache open-source software for simulating Hadoop clusters. D. Run the hadoop command with the -jt local and the -fs file:///options.

Correct Answer: B

QUESTION NO: 4
Identify the tool best suited to import a portion of a relational database every day as files into HDFS, and generate Java classes to interact with that imported data?

A. Hue B. Pig C. Sqoop D. Hive E. Oozie F. fuse-dfs G. Flume

Correct Answer: C

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QUESTION NO: 5
You are developing a MapReduce job for sales reporting. The mapper will process input keys representing the year (IntWritable) and input values representing product indentifies (Text).
Indentify what determines the data types used by the Mapper for a given job.

A. The InputFormat used by the job determines the mapper's input key and value types. B. The key and value types specified in the JobConf.setMapInputKeyClass and JobConf.setMapInputValuesClass methods C. The mapper-specification.xml file submitted with the job determine the mapper's input key and value types. D. The data types specified in HADOOP_MAP_DATATYPES environment variable

Correct Answer: A

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QUESTION NO: 6
You have the following key-value pairs as output from your Map task: (the, 1)
(fox, 1)
(faster, 1)
(than, 1)
(the, 1)
(dog, 1)
How many keys will be passed to the Reducer's reduce method?

A. Six B. Five C. One D. Three E. Four F. Two

Correct Answer: B

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Hortonworks Data Platform Certified Developer - HDPCD Exam Questions