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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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Resume: How to Prepare Quickly Online

I shared five ideas to prepare resume online. Surely, you can impress you HR and interviewer.
  1. Create an online resume or portfolio. We developed an open-source tool so that anyone can build a digital resume on their own domain. (It’s free.) 
  2. Don’t just showcase your relevant work experience; showcase your personality. 
  3. Set up a professional email, preferably at your own domain name. 
  4. Empower others to spread the message for you (Social media)
  5. Think outside the box to creatively get the attention of decision makers.

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