Operands

Question 1
The arithmetic expression : (a + b) * c - d / e * * f is to be evaluated on a two-address machine, where each operands, the number of registers required to evaluate this expression is ______. The number of memory access of operand is __________.
A
3 , 4
       Compiler-Design       Operands       Gate-1991
Question 1 Explanation: 
** is used for exponentiation.
So, in total 3 registers are required and 6 memory operations in total to fetch all operands.
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