Which statement about global scope is true?

• A. Variables declared in a function are accessible everywhere.
• B. Variables declared at the top level are accessible throughout the program.
• C. Global scope prevents variable shadowing.
• D. Global variables are always stored on the stack.

Answer: (B)

Global scope means a variable is defined outside of any function, so it is visible from anywhere in the program after its declaration. That’s why top-level declarations are accessible throughout the program, which is exactly what the true statement is saying. Variables inside a function stay local to that function and aren’t accessible globally. You can also have shadowing: a local variable with the same name as a global can hide the global within that local scope. And where global variables live isn’t fixed across languages; they aren’t typically stored on the stack, but rather in a separate area reserved for global data.