How would you evaluate the expression (A*(B+C)/D-G) using preorder traversal in a programming language of your choice?

To evaluate the expression (A*(B+C)/D-G) using preorder traversal in a programming language such as Python, you can use a stack data structure. Here is an example of how you can achieve this:

```python
def evaluate_expression(expression):
stack = []
operators = set(['+', '-', '*', '/'])
for char in reversed(expression):
if char not in operators:
stack.append(char)
else:
operand1 = stack.pop()
operand2 = stack.pop()
stack.append(str(eval(operand1 + char + operand2)))

return int(stack.pop())

expression = "(A*(B+C)/D-G)"
result = evaluate_expression(expression)
print(result)
```

In this code snippet, the `evaluate_expression` function uses a stack to process the expression in preorder traversal. It iterates over the expression characters in reverse order and performs the operations based on the encountered operators. Finally, the function returns the result of the evaluated expression.

When implementing this solution in an interview setting, be sure to explain your approach clearly and discuss any optimizations or considerations you have made.