Exam PCEP-30-02 topic 2 question 87 discussion

A does not match because it changes the order of operations by prioritizing addition/subtraction. B will produce a syntax error, as it includes 2 open parentheses, but 3 closing parentheses. C will produce a syntax error, as it includes 3 open parentheses, but 2 closing parentheses. This leaves D as the correct answer.

The expression in the function is: value = a + b * c - d According to the order of operations (PEMDAS/BODMAS), multiplication is performed before addition and subtraction. Therefore, the expression can be rewritten with parentheses to make the order of operations explicit: value = a + (b * c) - d This matches option B: B. (a + (b * c)) - d) So, the correct answer is: B. (a + (b * c)) - d)

I would say D is the correct answer, as in B and C are each a parentheses missing.

B is correct. Multiplication has higher precedence than addition and substraction. Then for addition and substraction with the same precedence, left associativity is applied.

value = 1 + 2 * 3 - 4 print(value) #3 value = (1 + (2 * 3)) - 4 print(value) #3 Hence B is correct

Why does the system say that the correct answer is B? It means the system answers can't be trusted?

b is the correct answer According to the order of operations (PEMDAS/BODMAS), multiplication is performed before addition and subtraction. Specifically: Multiplication: b * c Addition: a + (result of b * c) Subtraction: (result of a + b * c) - d

Answer D is correct. None of the above. A is wrong since multiplication has higher precedence than addition/subtraction B has a closing ")" too much C has an opening "(" too much