Monthly Archive: November 2014
1.When is the earliest point at which the reduce method of a given Reducer can be called? A. As soon as at least one mapper has finished processing its input split. B. As soon as …
In this tutorial, it shows the use of java.lang.Comparable and java.util.Comparator to sort a Java object based on its property value. Java provides some inbuilt methods to sort primitive types array or Wrapper classes array …
Serialization in java is a mechanism of writing the state of an object into a byte stream. What is Serialization? – Serializable is a marker interface. When an object has to be transferred over a …
The object cloning is a way to create exact copy of an object. For this purpose, clone() method of Object class is used to clone an object. The java.lang.Cloneable interface must be implemented by the …
Immutable class is a class which once created, it’s contents can not be changed. Immutable objects are the objects whose state can not be changed once constructed. e.g. String class An immutable class is one …
