Java interview Questions and Answers

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History of java:                Java  is a programming language was written by  James Gosling  along with his team. His team is calle...

JVM (Java Virtual Machine)        Java Virtual Machine is an abstract machine. It provides the runtime environment and executing java by...

Object-Oriented Programming:                                 OOPs is a programming language using  objects and classes instead of ac...

Java String                 The collection of characters is known as String . In java String is a class and it is a reference data type...

Java array        An array is used to store collection of same data type variables. Java arrays can hold Homogeneous data only. In arr...

Java threads: Life cycle of thread:                 There are four states in thread lifecycle new (start) ,runnable , non-runnable (w...