Which of the following statements is not true regarding global variables?

Question

BlackTom AI · Accepted Answer

The provided data for this question is incomplete: the answer_options array is empty, so there are no listed statements to analyze besides the single item in the answer field. In a typical multiple-choice setup, we would restate the full question and all options, then evaluate each option's truth value.

From the single given statement in the answer field: 'b. Global variables are accessed by functions defined before their declaration.' we can discuss general concepts about global variables to assess why such a statement might be considered not true, though keep in mind the lack of other options prevents a complete itemized analysis.

- In many programming languages, the ability of a function to access a global variable does not depend on whether the function is declared before or after the global variable in the source file. For example, in Python, global variables defined at module level are accessible to all functions within the module regardless of the textual position of those function definitions relative to the global variable, as long as the variable is in scope at runtime. If a function only reads a global and does not assign to it, you typically do not need a 'global' declaration inside the function.

- However, in languages like C or C++, the order of declarations and definitions can matter because the compiler needs to know about a variable before it is used in a function. If a global variable is defined after a function that uses it, the code may require a prior declaration (a 'extern' declaration in a header, or a forward declaration) so the compiler knows it exists. So, in such languages, the statement could be contextually true or false depending on language rules and how declarations are arranged.

- Given the wording 'accessed by functions defined before their declaration,' the phrase is ambiguous and potentially misleading without specifying the programming language. In languages with single-pass compilation or without proper forward declarations, this could be false if a function attempts to use a global variable before it has been declared.

Because the options are missing, we cannot definitively classify which statements are true or false beyond this single item, nor can we contrast it with other options that would typically appear in such a question. If the goal is to determine not-true statements about global variables, we would normally evaluate each option for consistency with the specific language rules in use and explain why each incorrect option is misleading or inaccurate in that context.

CPT111W PRINSIP PENGATURCARAAN (PRINCIPLES OF PROGRAMMING)

Which of the following statements is not true regarding global variables?

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