Consider the following code segment:

x = 5
y = 7
z = x - y * 2

After this code segment executes, the value of z is:

Question

Consider the following code segment:

x = 5
y = 7
z = x - y * 2

After this code segment executes, the value of z is:

BlackTom AI · Accepted Answer

To evaluate the expression correctly, we need to follow the standard order of operations: multiplication before subtraction.
Option 1: 5. This would imply either ignoring the multiplication or misplacing the operation, which is not consistent with x - y * 2 since y * 2 equals 14, not 0 or 5.
Option 2: 7. This would suggest adding or subtracting something that cancels out the 7, but the expression x - y * 2 cannot yield 7 given x = 5 and y = 7 when applying multiplication first.
Option 3: -9. Here’s why it’s correct: compute y * 2 = 7 * 2 = 14, then subtract from x: x - 14 = 5 - 14 = -9. This follows the proper arithmetic rule and the given values.
Option 4: -4. This could arise if you incorrectly did (x - y) * 2 = (5 - 7) * 2 = (-2) * 2 = -4, which is a violation of the standard precedence rules. It demonstrates a common mistake of applying subtraction before multiplication.

Fal25_CS003C_74229 Ch. 2 Pre-Quiz (Remotely Proctored)

Consider the following code segment: x = 5 y = 7 z = x - y * 2 After this code segment executes, the value of z is:

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Fal25_CS003C_74229 Ch. 2 Pre-Quiz (Remotely Proctored)

Consider the following code segment: x = 5 y = 7 z = x - y * 2 After this code segment executes, the value of z is:

查看解析

登录即可查看完整答案

类似问题

Question at position 10 In the following expression, which will be the second calculation run by MATLAB? X = (2+4)^2*(1+3)/2 ^2(2+4)(1+3)*

What value would the variable x have after the following line of code: x = 1 < 8 + ~10 > 5 Note - The values of x shown below are logical 0 (False) and logical 1 (True)

Which operator has the lowest precedence?

Which operator has the lowest precedence?

The cell containing the formula =5*10-2 > 100/2+2 will evaluate to TRUE.

If programmers create a code using several mathematical operations in Java, how can they specify the part of the expression they want carried out first?

What will be the value of the following Python expression?print(4 + 3 % 5)

What will be the value of the following Python expression?print(4 + 3 % 5)

更多留学生实用工具

希望你的学习变得更简单

Question at position 10 In the following expression, which will be the second calculation run by MATLAB? X = (2+4)^2(1+3)/2 ^2(2+4)(1+3)