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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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5 Ideas to Spark Your Career Growth Quickly

Lot of job prospects are available for cloud computing skill sets. Every analyst firm, from Gartner to IDC to Forrester and many others have released relative numbers claiming that cloud computing will grow revenues in the gazillions over the next five to ten years, creating millions of direct programmer jobs and many new jobs we don't even know about yet.
cloud computing

The future of cloud computing

It is surely lead the market, since all the digital technologies using cloud computing. So, the prospects are bright. Huge opportunities ahead for cloud computing engineers

According to research sponsored by Microsoft, and conducted by IDC in 2012, spending on public and private IT cloud services will generate nearly 14 million jobs worldwide from 2011 to 2015. 

And according to the 2012 Gartner CIO Agenda Report, the top three priorities for that year were analytics and business intelligence, mobile technologies, and cloud computing.

 Read more: Learn Cloud
  • Regardless of the industry, the technological transformations have been astounding, with all things now social, mobile, and cloud computing, just to name a few tech fields.
  • And what's been cool to watch is how these technologies have helped to innovate the very talent-acquisition and talent-management software systems that are used to recruit, hire, onboard, and develop tech pros like you. 
  • These technologies are all about getting to the "short list" of qualified applicants faster and more accurately, as well as managing more accurately, faster, and better all the employee life-cycle data.
  • Cloud computing hasn't completely replaced legacy ERP software systems like Oracle or SAP but there's a reason Oracle and SAP have been buying up the cloud-based companies that have gotten the formula right. It's why Workday, a totally cloud-based human capital management platform, is taking on the big boys by going public as well this year.

Promising Careers

  1. Cloud Computing
  2. Robotics
  3. Internet of Things
  4. Genetic Engineering
  5. Mobile Technologies
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