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What is java virtual machine...Could u please give me the detials for the same

Java Virtual Machine abbreviated as JVM is an abstract computing machine with three notions namely specification, implementation and instance.

Specification of JVM describes what is required of JVM implementation. If there is only one specification, it means that all implementation are interoperable. Implementation is a computer program that meets the requirement of specification.

Instance of JVM is generally a process that executes a computer program compiled into Java bytecode.

Overview of architecture of JVM:

Oracle corporation owns the trademark Java and is responsible for distributing Java Virtual Machine implementation.