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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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Social Media Jobs You need to look in

Social media has transformed the way people socialize, network and stay in touch.
Social Media Jobs
Social Media Jobs
Social media is more than liking or retweeting a post; it's a new, cutting-edge marketing medium with unlimited potential. According to Constant Contact's Small Businesses: Then and Now Survey conducted in May 2013, social media marketing has exploded, with 87 percent of small businesses using social media as a marketing tool today.

Since social media marketing requires a combination of analytical skills, good communication and performing extensive research, you can bet business, communications and English-related degrees are good candidates for 2014 social media job openings.

Explore the new frontier of marketing with these six up-and-coming social media positions:
  1. Search engine optimization (SEO) specialist
  2. Social media strategist
  3. Online community manager
  4. Social media marketing manager
  5. Social media marketing coordinator
  6. Blogger or social media copywriter

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