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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…

13 Must Read Analytics Blogs for all data professionals

Data science and analytics both are in the same group. In the broad sense, we can call it as data science. To update your knowledge, you need to read the below top 13 blogs.

13 must read blogs

Top 13 Blogs on Data Analytics

  1. ApplyBigAnalytics- Best blog from India
  2. Analytics Talk
  3. Business week Business exchange
  4. Crazy Egg 
  5. Google Analytics
  6. SEO Takeways
  7. HubSpot
  8. KissMetrics
  9. MixPanel
  10. Occam's Razor
  11. Online Behavior
  12. Search Engine Watch
  13. Web Analytics World

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