Microprocessor
PUSH B instruction in 8085 microprocessor causes

 the contents of register B & C to be copied in the stack
 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
 registers B & C to be cleared

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Microprocessor
Assertion (A): Negative values of incremental operator in DO loop are allowed in Fortran 77 but not in earlier versions of Fortran. Reason (R): Fortran 77 has better array facilities than earlier versions of Fortran.

A is correct R is wrong
A is wrong R is correct
Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A

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Microprocessor
The stack pointer register in a microprocessor

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

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