Microprocessor
Program counter in a digital computer

 Counts the number of times a subroutine is called.
 Counts the number of times the loops are executed.
 Counts the numbers of programs run in the machine.
 Points the memory address of the next instruction to be fetched.

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Microprocessor
PUSH B instruction in 8085 microprocessor causes

 the contents of registers B & C to be transferred in the stack and and the registers get cleared
 the contents of register B only to be copied in the stack
 the contents of register B & C to be copied in the stack
 registers B & C to be cleared

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