cs508 GDB 4 february 2020

[Mehran Dhillo]

As you know C# and JAVA both are virtual machine based languages, Java’s virtual machine name is Java Virtual Machine (JVM) and C#.NET names it as Common Language Runtime (CLR).

Compare both virtual machines to check which one is better than other, write at least two valid reasons in either case to support your answer.

[aashi]

A virtual machine (VM) is a virtual emulation of a computer operating system. Beyond that, though, there are two different implementations of this kind of system abstraction.

System virtual machines exist as fully-functional operating systems and are typically created as a substitute for using a physical machine.

The Common Language Runtime (CLR) and Java Virtual Machine (JVM) are both process virtual machines.

Top similarities between the CLR and JVM include:

• Both Virtual Machines (VMs)
• Both include garbage collection
• Both employ stack-based operations
• Both include runtime-level security
• Both have methods for exception handling

Top differences between the CLR and JVM include:

• CLR was designed to be language-neutral, JVM was designed to be Java-specific
• CLR was originally only Windows-compatible, JVM works with all major OSs
• CLR uses a JIT compiler, JVM uses a specialized JIT compiler called Java HotSpot
• CLR includes instructions for closures, coroutines and declaration/manipulation of pointers, the JVM does not
• JVM is compatible with more robust error resolution and production monitoring tools

 

The CLR and JVM are both virtual machines and they both perform platform-independent operations, namely, executing compiled source code. Essentially, these virtual machines both act as an intermediary step between the programmer’s source code and the system’s machine code, allowing for greater usability by various types of processors. In the image below, you can see how the high-level functions of the two are practically identical.

[Ubaid-Ul-Hassan]

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