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When we are working with an application on your computer, you open it, do some changes and then you close it. This is much like a Session.
With the release of Hadoop 2, however, YARN was introduced, which open doors for whole new world of data processing opportunities.
Mapper class is responsible for providing implementations for mapping jobs in MapReduce.
HDFS is one of the two main components of the Hadoop framework; the other is the computational paradigm known as MapReduce.
A dynamic-link library (DLL) is a module that contains functions and data that can be used by another module (application or DLL).
Inheritance means parent class property access child class like methods, members etc, and also reused code.
Interfaces define properties, methods, and events, which are the members of the interface. Interfaces contain only the declaration of the members. It
A Method without any method body is known as an abstract, what the method contain only declaration without any implementation & should be declare by o
Method overriding is a feature that allows you to invoke functions (that have same signatures) that belong to different classes in the same hierarchy
Method overloading is a feature which allows a class to have two or more methods having same name but different signature means (multiple behavior but
In HDFS, the Data block size needs to be large enough to warrant the resources dedicated to an individual unit of data processing On the other hand.
Hadoop has gone through some big API change in its 0.20 release, which is the basic interface in the 1.0 version .
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