Microprocessor
S0 and S1 pins are used for

 serial communication
None of these
 indicating the processor’s status
 acknowledging the interrupt

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

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Microprocessor
The stack pointer register in a microprocessor

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

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