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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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SAP HANA top Career Options to Find in Job Market

SAP HANA converges database and application platform capabilities in-memory to transform transactions, analytics, text analysis, predictive and spatial processing so businesses can operate in real-time. I have listed the areas on available careers for SAP HANA.

SAP HANA 

It has completely transformed the database industry by combining database, data processing, and application platform capabilities in a single in-memory platform.

The platform also provides libraries for predictive, planning, text processing, spatial, and business analytics -- all on the same architecture.

This makes it possible for applications and analytics to be rethought without information processing latency, and sense-and-response solutions can work on massive quantities of real-time data for immediate answers without building pre-aggregates.

Simply put -- this makes SAP HANA the platform for building and deploying next-generation, real-time applications and analytics

Operational Analytics

With transactional and analytical data stored together, SAP HANA provides on-the-fly analysis so you can make real-time decisions.

Big Data Capabilities

Crunch petascale data volumes for quick, accurate answers to sophisticated business problems.

Predictive, Spatial and Text Analysis

A powerful suite of predictive, spatial and text analytics libraries can run across multiple data sources

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