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The Ultimate Cheat Sheet On Hadoop

Top 20 frequently asked questions to test your Hadoop knowledge given in the below Hadoop cheat sheet. Try finding your own answers and match the answers given here.




Question #1 

You have written a MapReduce job that will process 500 million input records and generate 500 million key-value pairs. The data is not uniformly distributed. Your MapReduce job will create a significant amount of intermediate data that it needs to transfer between mappers and reducers which is a potential bottleneck. A custom implementation of which of the following interfaces is most likely to reduce the amount of intermediate data transferred across the network?



A. Writable
B. WritableComparable
C. InputFormat
D. OutputFormat
E. Combiner
F. Partitioner
Ans: e




Question #2 

Where is Hive metastore stored by default ?


A. In HDFS
B. In client machine in the form of a flat file.
C. In client machine in a derby database
D. In lib directory of HADOOP_HOME, and requires HADOOP_CLASSPATH to be modified.
Ans: c




Question…
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Hyperion: How to Learn as Alternative for Mainframe

Oracle Hyperion is a reporting tool. Its applications are Capital management, Asset planning, Workforce planning and more.

#Hyperion Career for Mainframe programmers:
Photo Credit: Srini

Books to Read on Hyperion

The Oracle Hyperion Financial Reporting 11 covers all basics to learn financial reporting using Hyperion tool.

The popular contents are

  • Explore Grids and the Point of View
  • Create Functions and Formulas
  • Master Conditional Formatting and Conditional Suppression
  • Create Dynamic Books and Batches
  • Import Reporting Content into MS Office with Oracle Smart View

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