C code to differentiate between Harvard and vON nUEMAN aRCHI

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1.How can I differentiate between Harvard and Von Nueman Architecture using C code
2.C code to check whether a controller is 8, 16 or 32 bit
3.a memory cell in ROM went bad in the runtime. Wat software protection will u do to overcome this? Assume an automotive application

4.what is the process happening inside the debugger