HDPCD Exam Questions & Answers

Exam Code: HDPCD

Exam Name: Hortonworks Data Platform Certified Developer

Updated: Mar 18, 2024

Q&As: 108

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Practice These Free Questions and Answers to Pass the HDP Certified Developer Exam

Questions 1

A combiner reduces:

A. The number of values across different keys in the iterator supplied to a single reduce method call.

B. The amount of intermediate data that must be transferred between the mapper and reducer.

C. The number of input files a mapper must process.

D. The number of output files a reducer must produce.

Show Answer
Questions 2

On a cluster running MapReduce v1 (MRv1), a TaskTracker heartbeats into the JobTracker on your cluster, and alerts the JobTracker it has an open map task slot.

What determines how the JobTracker assigns each map task to a TaskTracker?

A. The amount of RAM installed on the TaskTracker node.

B. The amount of free disk space on the TaskTracker node.

C. The number and speed of CPU cores on the TaskTracker node.

D. The average system load on the TaskTracker node over the past fifteen (15) minutes.

E. The location of the InsputSplit to be processed in relation to the location of the node.

Show Answer
Questions 3

You have just executed a MapReduce job. Where is intermediate data written to after being emitted from the Mapper's map method?

A. Intermediate data in streamed across the network from Mapper to the Reduce and is never written to disk.

B. Into in-memory buffers on the TaskTracker node running the Mapper that spill over and are written into HDFS.

C. Into in-memory buffers that spill over to the local file system of the TaskTracker node running the Mapper.

D. Into in-memory buffers that spill over to the local file system (outside HDFS) of the TaskTracker node running the Reducer

E. Into in-memory buffers on the TaskTracker node running the Reducer that spill over and are written into HDFS.

Show Answer
Questions 4

Which HDFS command displays the contents of the file x in the user's HDFS home directory?

A. hadoop fs -Is x

B. hdfs fs -get x

C. hadoop fs -cat x

D. hadoop fs -cp x

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Questions 5

You need to create a job that does frequency analysis on input data. You will do this by writing a Mapper that uses TextInputFormat and splits each value (a line of text from an input file) into individual characters. For each one of these characters, you will emit the character as a key and an InputWritable as the value. As this will produce proportionally more intermediate data than input data, which two resources should you expect to be bottlenecks?

A. Processor and network I/O

B. Disk I/O and network I/O

C. Processor and RAM

D. Processor and disk I/O

Show Answer

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