Which of the following statements is INCORRECT?

Question

BlackTom AI · Accepted Answer

Here we go through each statement to identify which one is incorrect.
Option 1: 'Changing a variable's name doesn't affect code execution.' At first glance, one might think renaming has no effect, but in practice, a variable's name must be consistently updated wherever it is referenced. If references are not updated correctly, code can fail to compile or behave wrongly. Therefore, as a general rule, changing a variable name can affect execution unless all usage sites are properly updated—so the statement is misleading and can be considered incorrect in many real-world contexts.
Option 2: 'Writing readable code helps other people to understand it.' This is widely accepted as true. Readable code communicates intent more clearly, easing maintenance, collaboration, and future changes. There’s strong consensus that readability improves long-term quality, so this option is correct.
Option 3: 'Complex programs are always bug free by design.' This is definitively false. No matter how well designed, complex software tends to have bugs due to numerous interacting components, edge cases, and evolving requirements. The word 'always' makes this statement untenable and incorrect.
Option 4: 'Writing readable code makes it less likely to introduce bugs.' This is generally true for many reasons: clearer structure helps developers spot mistakes, better naming reduces confusion, and simpler, well-documented code tends to have fewer defects. Thus, this statement is correct.
In summary, the statements that are incorrect are those that make absolute or misleading claims about code renaming effects (Option 1) and about bugs being absent in complex systems (Option 3). The other two options align with best practices in software development.

Which of the following statements is INCORRECT?多项选择题

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