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
Which of the following is not true during the execution of an interrupt service routine, which does not contain any EI instructions

 all interrupts except non-maskable interrupt are disabled
 the microprocessor can be interrupted by a non-mask able interrupt
 the microprocessor cannot be interrupted by any mask able interrupt
 the microprocessor cannot be interrupted by any interrupt

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