Microprocessor
At the beginning of a fetch cycle, the contents of the program counter are

 incremented by one.
 transferred to address bus.
 transferred to memory address register .
 transferred to memory data register.

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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

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

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