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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:

Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

1. Which best describes how TextInputFormat processes input files and line breaks?

A) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the beginning of the broken line.
B) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReaders of both splits containing the broken line.
C) Input file splits may cross line breaks. A line that crosses file splits is ignored.
D) The input file is split exactly at the line breaks, so each RecordReader will read a series of complete lines.
E) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the end of the broken line.

2. Which one of the following statements is FALSE regarding the communication between DataNodes and a federation of NameNodes in Hadoop 2.0?

A) DataNodes send periodic block reports to all the NameNodes.
B) Each DataNode receives commands from one designated master NameNode.
C) DataNodes send periodic heartbeats to all the NameNodes.
D) Each DataNode registers with all the NameNodes.

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

4. 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) Disk I/O and network I/O
B) Processor and disk I/O
C) Processor and RAM
D) Processor and network I/O

5. Which one of the following Hive commands uses an HCatalog table named x?

A) Hive commands cannot reference an HCatalog table
B) SELECT * FROM org.apache.hcatalog.hive.HCatLoader('x');
C) SELECT x.-FROM org.apache.hcatalog.hive.HCatLoader('x');
D) SELECT * FROM x;

Solutions: