What concept dictates what portions of code can access a variable, depending on where created?

What concept dictates what portions of code can access a variable, depending on where created?

• A. Global vs Local
• B. Variable Type
• C. Variable Lifetime
• D. Variable Scope

Answer: (D)

Scope is the set of places in a program where a variable can be accessed after it’s created. It determines which parts of your code can read or modify that variable. If you declare a variable inside a function, only the code inside that function can see it, so it’s local to that function. If you declare it at the top level, it’s global and can be accessed from anywhere after its declaration. Some languages also have block-level scope inside loops or conditionals, but the core idea is that scope governs visibility. This is different from lifetime—the duration the memory for the variable exists—or from its data type, which is about what kind of value it holds. Knowing how scope works helps you predict where a variable can be used and prevents errors from accessing variables outside their intended area.

Scope is the set of places in a program where a variable can be accessed after it’s created. It determines which parts of your code can read or modify that variable. If you declare a variable inside a function, only the code inside that function can see it, so it’s local to that function. If you declare it at the top level, it’s global and can be accessed from anywhere after its declaration. Some languages also have block-level scope inside loops or conditionals, but the core idea is that scope governs visibility. This is different from lifetime—the duration the memory for the variable exists—or from its data type, which is about what kind of value it holds. Knowing how scope works helps you predict where a variable can be used and prevents errors from accessing variables outside their intended area.