What is the main role of the Java Virtual Machine in executing Java programs?

Java Virtual Machine (JVM) is a software environment that executes Java bytecode. The main roles of JVM:

• Platform independence: JVM allows Java programs to run on different operating systems and hardware platforms without changing the code.
• Bytecode execution: the Java compiler converts source code into bytecode, which is interpreted or compiled into machine code by JVM during runtime.
• Memory management: JVM is responsible for allocating and freeing memory, including garbage collection.
• Security: JVM isolates program execution and controls access to system resources.
• Performance optimization: through JIT compilation (Just-In-Time), JVM converts bytecode into native code to speed up execution.

Thus, JVM acts as an intermediary layer between the Java program and the operating system, ensuring portability, security, and execution efficiency.