Answer-01
I have learned from this experiment stack operation. How to do stack memory addressing,data are stored and removed form stack memory.In this mode, operand is at the top of the stack.this instruction will POP top two items from the stack, add them, and will then PUSH the result to the top of the stack.
Answer-02
In gathering dialect programming we have as it were four registers AX, BX, CX and DX . But when we require a parcel of registers for putting away factors these four registers are not sufficient. So we ought to reuse these registers once more and once more. This will be done by putting away the display esteem of a enroll within the stack fragment. at that point we will reuse our AX, BX, CX and DX.