Microprocessor
The execution of RST n instruction causes the stack pointer to

 decrement by two
 remain unaffected
None of these
 increment by two

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Microprocessor
The stack pointer register in a microprocessor

 counts the number of programs being executing on the microprocessor
 holds the address of the top of the stack
 keeps the address of the next instruction to be fetched
 counts the number of instructions being executing on the microprocessor

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