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Hortonworks Data Platform Certified Developer (HDPCD) - Hworks Exam Questions

Last updated on June 20, 2026

97% Exam Compliance
108 Total Questions
1
Question
Which one of the following statements describes a Hive user-defined aggregate function?
Options
A Operates on multiple input rows and creates a single row as output
B Operates on a single input row and produces a table as output
C Operates on a single input row and produces a single row as output
D Operates on multiple input rows and produces a table as output
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2
Question
Which one of the following statements is true regarding a MapReduce job?
Options
A The job's Partitioner shuffles and sorts all (key.value) pairs and sends the output to all reducers
B The default Hash Partitioner sends key value pairs with the same key to the same Reducer
C The reduce method is invoked once for each unique value
D The Mapper must sort its output of (key.value) pairs in descending order based on value
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3
Question
Which one of the following files is required in every Oozie Workflow application?
Options
A Oozie.xml
B Workflow.xml
C Config-default.xml
D job.properties
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4
Question
Which one of the following statements is FALSE regarding the communication between DataNodes and a federation of NameNodes in Hadoop 2.2?
Options
A Each DataNode receives commands from one designated master NameNode.
B Each DataNode registers with all the NameNodes.
C DataNodes send periodic block reports to all the NameNodes.
D DataNodes send periodic heartbeats to all the NameNodes.
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5
Question
Examine the following Hive statements: Assuming the statements above execute successfully, which one of the following statements is true?
Options
A The output is guaranteed to be a single file with all the data sorted by age
B The SORT BY command causes only one reducer to be used
C The output of each reducer is only the age column
D Each reducer generates a file sorted by age
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